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USER MANUAL OS 353CV 81 Mirka
Mirka ^® Orbital Sander
70 mm x 198 mm (3 x 8"), 75 mm x 100 mm (3 x 4")
& 81 mm x 133 mm (3 x 5")

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Exterior view of a MIRKA industrial sandblasting machine (no signage or text on body)
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Stylized illustration of a bulldog in aggressive posture (no text or symbols)Mirka ^® Orbital Sander
70 mm x 198 mm (3 x 8"), 75 mm x 100 mm (3 x 4") & 81 mm x 133 mm (3 x 5")
ar 10-13
Original Instructions
Parts List - Mirka© OS 70x198mm
| Item | P/NDescription | Qty. | |
| 1MPA0040 EXTERNAL RETAINING RING 1 | |||
| 2MPA0021 BEARING - 2 SHIELDS 1 | |||
| 3MPB0017 REAR ENDPLATE 1 | |||
| 4 MPA0005 CYLINDER ASSEMBLY 1 | |||
| 5 MPA0042 O-RING 1 | |||
| 6MPB0005 ROTOR 1 | |||
| 7 MPA0010 VANE 5 | |||
| 8 MPA0041 WOOD RUFF KEY 1 | |||
| 9 MPB0016 FRONT ENDPLATE 1 | |||
| 10 MPA0019 BEARING - 2 SHIELDS | 1 | ||
| 11 MPA0045 O-RING 1 | |||
| 12MPA0001 LOCK RING | 1 | ||
| 13MPB0531 SHAFT BALANCER 1 | |||
| 14 MPA0122 FILTER | 1 | ||
| 15 MPA0121 DUCK BILL CHECK VALVE | 1 | ||
| 16MPA0120 VALVE RETAINER | 1 | ||
| 17 MPA0090 RETAINING RING 1 | |||
| 18 MPA0938 DOUBLE ROW ANGULAR CONTACT BEARING - 1 SEAL | 1 | ||
| 19 MPA0016 SPACER 0.2 THK | 1 | ||
| 20 MPA0017 BELLEVILLE WASHER 1 | |||
| 21MPA0018 RETAINING RING 1 | |||
| 22MPA0113 SPINDLE ASSEMBLY | 1 | ||
| 23MPA0079 SPACER 0.2 THK | 1 | ||
| 24 MPA0080 SPACER 0.4 THK | 1 | ||
| 25 MPA1697 THROTTLE LEVER | 1 | ||
| 26MPA0031 LEVER SPRING PIN | 1 | ||
| 27 | MPA0288 GRIP, 2 1/2 in. | OPT | |
| MPA0289 GRIP, 2 3/4 in | OPT | ||
| MPA0290 GRIP, 3 in. | 1 | ||
| 28 MPA0015 VALVE SLEEVE | 1 | ||
| 29 MPA0227 HOUS NG | 1 | ||
| 30 MPA0008 VALVE STEM ASSEMBLY | 1 | ||
| 31MPA0043 O-RING 1 | |||
| 32MPB0014 SPEED CONTROL | 1 | ||
| 33 MPA0039 INTERNAL RETAINING RING | 1 | ||
| 34 MPA0768 SCREW | 4 | ||
| 35 MPA0076 WASHER 0.8 THK 4 | |||
| 36MPA0071 THREADED INSERT | 2 | ||
| 37 MPA0770 SCREW | 2 | ||
| 38 | MPD0051 NON-VACUUM SHROUD | 2 | |
| 39 MPA0169 SHROUD SEAL | 1 | ||
| 40 | MPD0052 CVDB SHROUD | 1 | |
| 41 | MPC0230 PAD SUPPORT | 2 | |
| 42 MPA0766 SCREW | 4 | ||
| 43 | MPB0534 PAD BACKING | 1 | |
| 44 MPA0767 SCREW | 4 | ||
| 45 MPA0078 SCREW | 1 | ||
| 46 | N/A | SCREEN ABRASIVE MOLDED INSERT PAD LAYOUT | 1 |
| 47 MPA0864 HEX WRENCH | 1 | ||
| 48 MPA0032 MUFFLER INSERT (for 10,000 RPM Machines) | 2 | ||
| 49 MPA0038 MUFFLER PLATE | 1 | ||
| 50 MPA0166 MUFFLER HOUSING | 1 | ||
| 51 MPA0009 VALVE SEAT | 1 | ||
| 52 | MPA0007 VALVE | 1 | |
| 53 MPA0014 VALVE SPRING | 1 | ||
| 54 MPA0013 INLET BUSHING ASSEMBLY | 1 | ||
| 55 MPA0044 O-RING 2 | |||
| 56 MPA0722 10,000 RPM DB RETAINER | 1 | ||
| 57 | MPA0410 ASSEMBLY FOR 1 in./28 mm HOSE SuperVAC DB SWIVEL EXHAUST FITTING | 1 | |
| 58 | MPA0409 ASSEMBLY FOR 3/4 in./19 mm HOSE SuperVAC SWIVEL EXHAUST FITTING | OPT | |
| 59 MPA0778 1 in./28 mm HOSE SEAL | 1 | ||
| 60 MPA0854 3/4 in./19 mm HOSE SEAL | OPT | ||
| 61 | MPA0931 MIRKA 1 in./28 mm HOSE SEAL TAG W/INSTRUCTION | 1 | |
| 62 | MPA0092 1 in./28 mm OS SuperVAC CV SWIVEL EXHAUST ASSEMBLY | 1 | |
| 63 | MPA0298 OS SuperVAC 3/4 in. CV SWIVEL EXHAUST ASSEMBLY | OPT | |
| 64 MPA0048 FLANGED NUT | 1 | ||
| 65 MPA0047 WASHER | 1 | ||
| 66MPA0769 SCREW | 1 | ||
| 67 | MPA0300 ∅ 3/4 in. VAC HOSE TO ∅ 3/4 in. x 1 in./28 mm ADAPTER COUPLING AND AIRLINE ASSM | OPT | |
| 68 | MPA0412 ∅ 1 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY | 1 | |
| MPA0411 ∅ 3/4 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY | OPT | ||
| 69 MPA0465 10 PACK OF VACUUM BAG INSERTS | 1 | ||
| 70 MPA0658 VACUUM BAG | 1 | ||
| 71 MPA2541 FRONT BEARING DUST SHIELD | 1 | ||
| 72 MPA2542 SPINDLE BEARING DUST SHIELD | 1 | ||

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G 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 G E G B J 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 F A C L K TO INLET TO VACUUM SYSTEM FOR CENTRAL VAC ITEM TORQUE SETTING Nm (in.-lbs.) 12 6.2 - 7.3 (55 - 65) 31 2.2 - 2.8 (20 - 25) 40 2.8 - 3.4 (25 - 30) 42 2.8 - 3.4 (25 - 30) 43 10.7 - 11.8 (95 - 105) 48 1.8 - 2.3 (16 - 20) 52 6.8 - 8.1 (60 - 72) 55 4.0 - 5.4 (36 - 48) 68 3.4 - 3.9 (30 - 35)| ITEM | TORQUE SETTING Nm (in.-Ibs.) |
| 12 | 6.2 - 7.3 (55 - 65) |
| 31 | 2.2 - 2.8 (20 - 25) |
| 40 | 2.8 - 3.4 (25 - 30) |
| 42 | 2.8 - 3.4 (25 - 30) |
| 43 | 10.7 - 11.8 (95 - 105) |
| 48 | 1.8 - 2.3 (16 - 20) |
| 52 | 6.8 - 8.1 (60 -72) |
| 55 | 4.0 - 5.4 (36 - 48) |
| 68 | 3.4 - 3.9 (30 - 35) |
Parts List - Mirka© OS 75x100mm
| Item Part No. Description Qty. | |||
| 1MPA0040 RETAINING RING 1 | |||
| 2MPA0021 BEARING1 | |||
| 3MPB0017 REAR ENDPLATE 1 | |||
| 4 MPA0005 CYLINDER ASSEMBLY 1 | |||
| 5 MPA0042 O-RING 1 | |||
| 6MPB0005 MACHINED ROTOR 1 | |||
| 7 MPA0010 VANE 5 | |||
| 8 MPA0041 KEY 1 | |||
| 9 MPB0016 FRONT ENDPLATE 1 | |||
| 10 | MPA0019 BEARING1 | ||
| 11 | MPA0045 ORING 1 | ||
| 12 | MPA0001 LOCK RING | 1 | |
| 13 | MPB0102 3 mm (1/8 in.) ORBIT AirSHIELDTM SHAFT BALANCER | 1 | |
| 14 | MPA0122 FILTER | 1 | |
| 15 | MPA0121 VALVE | 1 | |
| 16 | MPA0120 RETAINER | 1 | |
| 17 | MPA0107 RETAINING RING 1 | ||
| 18 | MPA0162 BEARING1 | ||
| 19 | MPA0196 HIM | 1 | |
| 20 | MPA0161 BEARING1 | ||
| 21 | MPA0108 SHIM | 1 | |
| 22 | MPA0126 WASHER | 1 | |
| 23 | MPA0177 RETAINING RING 1 | ||
| 24 | MPA0163 SPINDLE ASSEMBLY | 1 | |
| 25 | MPA0080 SPACER (0,4 mm thick) | 1 | |
| 26 | MPA0079 SPACER (0,2 mm thick) | OPT | |
| 27 | MPA1697 LEVER | 1 | |
| 28 | MPA0031 PIN | 1 | |
| 29 | MPA0288 65 mm GRIP (2 12 in.) | OPT | |
| MPA0289 70 mm GRIP (2 34 in.) | OPT | ||
| MPA0290 75 mm GRIP (3 in.) 1 | |||
| 30 | MPA0015 SLEEVE | 1 | |
| 31 | MPA0768 SCREW | 4 | |
| 32 | MPA0076 WASHER | 4 | |
| 33 | MPA0743 HOUSING | 1 | |
| 34 MPC0162 SEAL | 1 | ||
| 35 | MPA0008 VALVE STEM ASSEMBLY | 1 | |
| 36 | MPA0043 ORING 1 | ||
| 37 | MPB0014 SPEED CONTROL | 1 | |
| 38 | MPA0039 RETAINING RING 1 | ||
| 39 MPC0018 MINI PAD SUPPORT ASSEMBLY | 2 | ||
| 40 | MPA0766 SCREW | 4 | |
| 41 | MPB0101 PAD BACKING | 1 | |
| 42 | MPA0767 SCREW | 4 | |
| 43 | MPA0078 SCREW | 1 | |
| 44 | NA SEE LITERATURE FOR PADS (type/size determined by model) | 1 | |
| 45 | MPA0864 2.5 mm HEX WRENCH (supplied with each tool) | 1 | |
| 46 | MPA0032 MUFFLER | 2 | |
| 47 | MPA0038 PLATE | 1 | |
| 48 | MPA0166 MUFFLER HOUSING | 1 | |
| 49 | MPA0009 SEAT | 1 | |
| 50 | MPA0007 VALVE | 1 | |
| 51 | MPA0014 VALVE SPRING | 1 | |
| 52 | MPA0013 INLET BUSHING | 1 | |
| 53 | MPB0069 SNAP-IN VACUUM COVER PLATE | 1 | |
| 54 MPC0017 SNAP IN EXHAUST ADAPTER | 1 | ||
| 55 | MPA0722 DB RETAINER | 1 | |
| 56 | MPA0044 ORING 2 | ||
| 57 | MPA0410 28 mm (1 in.) HOSE SuperVACTM DB SWIVEL EXHAUST ASSEMBLY | 1 | |
| 58 | MPA0409 19 mm ( 34 in.) HOSE SuperVACTM DB SWIVEL EXHAUST ASSEMBLY | OPT | |
| 59 | MPA0778 28 mm (1 in) HOSE SEAL | 1 | |
| 60 | MPA0854 19 mm ( 34 in.) HOSE SEAL | OPT | |
| 61 | MPA0856 MIRKA 34 in (19 mm) HOSE SEAL TAG WITH INSTRUCTION | OPT | |
| MPA0931 MIRKA 1 in (28 mm) HOSE SEAL TAG WITH INSTRUCTION | 1 | ||
| 62 | MPA0412 ∅ 28 mm (1 in.) VAC HOSE TO ∅ 28 mm (1 in.) DOUBLE BAG FITTING AND AIRLINE ASSY. | 1 | |
| MPA0411 ∅ 19 mm ( 34 in.) VAC HOSE TO ∅ 19 mm ( 34 in.) DOUBLE BAG FITTING AND AIRLINE ASSEMBLY | OPT | ||
| 63 | MPA0300 ∅ 19 mm ( 34 in.) HOSE TO ∅ 34 in. x ∅ 28 mm (1 in.) HOSE ADAPTER COUPLING AND AIRLINE ASSY. | OPT | |
| 64 | MPA0298 SuperVACTM CV 19 mm ( 34 in.) CV SWIVEL EXHAUST ASSEMBLY | OPT | |
| 65 | MPA0092 SuperVACTM CV 28 mm (1 in.) CV SWIVEL EXHAUST ASSEMBLY | 1 | |
| 66 | MPA0048 NUT | 1 | |
| 67 | MPA0047 WASHER | 1 | |
| 68 | MPA0769 SCREW | 1 | |
| 69 | MPA0658 VACUUM BAG | 1 | |
| 70 | MPA0465 10 PACK OF VACUUM BAG INSERTS | 1 | |
| 71 | MPA2541 FRONT BEARING DUST SHIELD | 1 | |
| 72 | MPA2543 SPINDLE BEARING DUST SHIELD | 1 | |

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H 1 2 3 5 6 8 9 J 10 11 12 73 13 14 16 B 20 74 22 24 26 E 27 28 30 31 32 33 34 35 36 37 H 38 39 F 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 60 59 C D L 61 62 63 TO INLET TO VACUUM SYSTEM FOR CENTRAL VAC TO INLET TO VACUUM SYSTEM FOR CENTRAL VAC G ITEM TORQUE SETTING Nm (in-lbs.) 12 6.2 - 7.3 (55 - 65) 36 2.2 - 2.8 (20 - 25) 39 2.2 - 2.8 (20 - 25) 44 2.8 - 3.4 (25 - 30) 46 2.8 - 3.4 (25 - 30) 47 10.7 - 11.8 (95 - 110) 52 1.8 - 2.3 (16 - 20) 56 6.8 - 8.1 (60 - 72) 58 4.0 - 5.4 (36 - 48) 70 3.4 - 3.9 (30 - 35)| ITEM | TORQUE SETTING Nm (in.-lbs.) |
| 12 | 6.2 - 7.3 (55 - 65) |
| 36 | 2.2 - 2.8 (20 - 25) |
| 39 | 2.2 - 2.8 (20 - 25) |
| 44 | 2.8 - 3.4 (25 - 30) |
| 46 | 2.8 - 3.4 (25 - 30) |
| 47 | 10.7 - 11.8 (95 - 110) |
| 52 | 1.8 - 2.3 (16 - 20) |
| 56 | 6.8 - 8.1 (60 - 72) |
| 58 | 4.0 - 5.4 (36 - 48) |
| 70 | 3.4 - 3.9 (30 - 35) |
Parts List - Mirka© OS 81x133mm
| Item | P/NDescription Qty. | ||
| 1 | MPA0040 RETAINING RING 1 | ||
| 2MPA0021 BEARING1 | |||
| 3MPB0017 REAR ENDPLATE 1 | |||
| 4 MPA0042 O-RING 1 | |||
| 5 MPA0005 CYLINDER ASSEMBLY 1 | |||
| 6MPB0005 ROTOR 1 | |||
| 7 MPA0010 VANE 5 | |||
| 8 MPA0041 KEY1 | |||
| 9 MPB0016 FRONT ENDPLATE 1 | |||
| 10 MPA0019 BEARING1 | |||
| 11MPA0045 O-RING 1 | |||
| 12MPA0001 LOCK RING | 1 | ||
| 13 | MPB0179 | 3 mm (1/8 in.) ORBIT AirSHIELDTM SHAFT BALANCER | 1 |
| 14 MPA0122 FILTER | 1 | ||
| 15 | MPA0121 | VALVE | 1 |
| 16MPA0120 RETAINER | 1 | ||
| 17 MPA0090 RETAINING RING 1 | |||
| 18 MPA0035 BEARING1 | |||
| 19 MPA0193 SHIM | 1 | ||
| 20 MPA0020 BEARING1 | |||
| 21MPA0016 SHIM | 1 | ||
| 22MPA0017 WASHER | 1 | ||
| 23MPA0018 RETAINING RING 1 | |||
| 24 MPA0113 SPINDLE ASSEMBLY | 1 | ||
| 25 MPA0079 SPACER (0.2 mm thick) | OPT | ||
| 26MPA0080 SPACER (0.4 mm thick) | 1 | ||
| 27 MPA1697 LEVER | 1 | ||
| 28 MPA0031 PIN | 1 | ||
| 29 | MPA0288 65 mm GRIP (21⁄2 in.) | OPT | |
| MPA0289 70 mm GRIP (23⁄4 in.) | OPT | ||
| MPA0290 75 mm GRIP (3 in.) 1 | |||
| 30 MPA0015 SLEEVE | 1 | ||
| 31MPA0227 HOUSING | 1 | ||
| 32MPA0008 VALVE STEM ASSEMBLY | 1 | ||
| 33MPA0043 O-RING 1 | |||
| 34 MPB0014 SPEED CONTROL | 1 | ||
| 35 MPA0039 RETAINING RING 1 | |||
| 36MPA0768 SCREW | 4 | ||
| 37 MPA0076 WASHER | 4 | ||
| 38 MPA0071 THREADED INSERT | 2 | ||
| 39 MPA0770 SCREW | 2 | ||
| 40 | MPD0004 | SHROUD (Right Hand and NV Left Hand) | 2 |
| 41 MPA0444 SHROUD SEAL | 1 | ||
| 42 | MPD0005 CV/DB SHROUD | 1 | |
| 43 | MPC0089 PAD SUPPORT ASSEMBLY | 2 | |
| 44 MPA0766 SCREW | 4 | ||
| 45 | MPC0115 PAD BACKING | 1 | |
| 46 MPA0767 SCREW | 4 | ||
| 47 MPA0078 SCREW | 1 | ||
| 48 | NA | SEE LITERATURE FOR PADS (type/size determined by model) | 1 |
| 49 MPA0864 2.5 mm HEX WRENCH (supplied with each tool) | 1 | ||
| 50 MPA0032 MUFFLER | 2 | ||
| 51 MPA0038 PLATE | 1 | ||
| 52 MPA0166 MUFFLER HOUSING | 1 | ||
| 53 MPA0009 SEAT | 1 | ||
| 54 | MPA0007 | VALVE | 1 |
| 55 MPA0014 VALVE SPRING | 1 | ||
| 56 MPA0013 INLET BUSHING | 1 | ||
| 57 MPA0044 O-RING 2 | |||
| 58 MPA0722 DB RETAINER | 1 | ||
| 59 | MPA0410 | ∅ 28 mm (1 in.) HOSE SuperVACTM DB SWIVEL EXHAUST ASSEMBLY | 1 |
| 60 MPA0409 ∅ 19 mm (3⁄4 in.) HOSE SuperVACTM DB SWIVEL EXHAUST ASSEMBLY | OPT | ||
| 61MPA0778 28 mm (1 in) HOSE SEAL | 1 | ||
| 62 | MPA0856 Mirka 19 mm (3⁄4 in.) HOSE SEAL TAG WITH INSTRUCTION | OPT | |
| MPA0931 Mirka 28 mm (1 in.) HOSE SEAL TAG WITH INSTRUCTION | 1 | ||
| 63MPA0854 19 mm (3⁄4 in) HOSE SEAL | OPT | ||
| 64 | MPA0412 | ∅ 28 mm (1 in.) VAC HOSE TO ∅ 28 mm (1 in.) DOUBLE BAG FITTING AND AIRLINE ASSY. | 1 |
| MPA0411 | ∅ 19 mm (3⁄4 in.) VAC HOSE TO ∅ 19 mm (3⁄4 in.) DOUBLE BAG FITTING AND AIRLINE ASSEMBLY | OPT | |
| 65 | MPA0300 | ∅ 19 mm (3⁄4 in.) HOSE TO ∅ 19 mm (3⁄4 in.) x ∅ 28 mm (1 in.) HOSE ADAPTER COUPLING AND AIRLINE ASSY. | OPT |
| 66 | MPA0092 | SuperVACTM CV ∅ 28 mm (1 in.) CV SWIVEL EXHAUST ASSEMBLY | 1 |
| 67 MPA0298 SuperVACTM CV ∅ 19 mm (3⁄4 in.) CV SWIVEL EXHAUST ASSEMBLY | OPT | ||
| 68 MPA0048 NUT | 1 | ||
| 69 MPA0047 WASHER | 1 | ||
| 70 MPA0769 SCREW | 1 | ||
| 71 MPA0658 VACJUM BAG | 1 | ||
| 72 MPA0465 10 PACK OF VACUUM BAG INSERTS | 1 | ||
| 73 MPA2541 | FRONT BEARING DUST SHIELD | 1 | |
| 74 MPA2542 | SPINDLE BEARING DUST SHIELD | 1 | |



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Exploded view diagram of a mechanical component showing internal parts (no text or symbols)A MPA0805
10,000 opm Muffler Kit
Code: 8993017211

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Pure mechanical diagram showing a series of concentric circular components without any text, numbers, or symbols.B MPA0806
OS Spindle Bearing Kit
Code: 8993019411

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Technical line drawing of a mechanical component with no visible text or symbolsC MPA0798
Air Inlet Kit
Code: 8993018811

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Pure mechanical assembly diagram showing shafts and housing (no text or symbols)D MPA0932
DB Swivel Fitting Kit
Code: 8993011311

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Technical line drawing of a mechanical component with no visible text or symbolsE MPA0994
Cylinder & O-ring Kit
Code: 8993009211

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Two concentric circular diagrams with internal lines, no text or symbols presentF MPA0993
Lock Ring & O-ring Kit
Code: 8993007911

G MPA3207
CV Swivel Fitting Kit
Code: 8991600311

H MPA0799
Endplate Bearing Kit
Code: 8993019811

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Technical diagram showing a multi-step assembly of a cylindrical component with internal components and a separate final view.| MPA0800
Speed Valve Kit
Code: 8993019011

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Technical line drawing of a mechanical component with no visible text or symbolsJ MPA0801
Code: 8993017711
Rotor, Vanes & Key Kit

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Abstract arrangement of black circular and rectangular shapes on white background (no text or symbols)KMPA1672
Screw Kit
Code: 8993015511

L MPA2697
DB Retainer Kit
Code: 8991600911
| إ Courار المطابقةMirka Ltd.66850 Jeppo, Finland(.ni 5 x .ni 3) mm 331 x mm 18 & (.ni 4 x .ni 3) mm 001 x mm 57 ,(ni 8 x .ni 3) mm 891 x mm 07En ISO : En ISO 00001 و 12100:2010EC/2006/42 EN ISO 28927-3:2009 و EN ISO 15744:2008 EN ISO 11148-8:2011 و | ||
MIRKA 04.06.2020 Jeppo | ||
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National Standards Institute, Inc.; 1430 Broadway; New York,
.New York 10018
Stefan Sjöberg, Executive Vice President

Brugervejledning
Declaration of conformity
Mirka Ltd.
FI-66850 Jeppo, Finland
declare on our sole responsibility that the products 70 mm x 198 mm (3 in. x 8 in.), 75 mm x 100 mm (3 in. x 4 in.) & 81 mm x 133 mm (3 in. x 5 in.) 10,000 OPM Orbital Sanders (See "Product Configuration/Specifications" table for particular model) to which this declaration relates are in conformity with the following standard(s) or other normative document(s): EN ISO 12100:2010, EN ISO 11148-8:2011, EN ISO 15744:2008 & EN ISO 28927-3:2009 in accordance with the regulation 2006/42/EC.
Jeppo 04.06.2020
MIRKA
Place and date of issue Company Stefan Sjöberg, CEO

Operator Instructions
Includes – Please Read and Comply, Proper Use of Tool, Work Stations, Putting the Tool Into Service, Operating Instructions, Product Configuration/Specifications Tables, Parts Page, Parts List, Sander Spare Parts Kits, Troubleshooting Guide.
Important
Read these instructions carefully before installing, operating, servicing or repairing this tool. Keep these instructions in a safe accessible location.

text_image
C€Manufacturer/Supplier
Mirka Ltd.
66850 Jeppo, Finland
Tel: +358 20 760 2111

Required Personal Safety Equipment
Safety Glasses Breathing Masks
Safety Gloves Ear Protection
WARNING
Always wear required personal safety protection in accordance with manufacturer's instructions and local/national standards while using this tool.
- Do not use a power tool if you are tired or under the influence of drugs, alcohol or medication.
- Read the Materials Safety Data Sheet (MSDS) for the working surface.
- Use the tool with dust extraction. A suitable dust extraction unit will reduce hazardous dust.
- Do not overreach. Keep proper footing and balance at all times.
- Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts.
Loose clothes, jewellery or long hair can be caught in moving parts. - If any physical hand/wrist discomfort is experienced, stop working and seek medical attention.
Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibrations. - Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.
• The tool is not electrically insulated. Check work area for live electricity, gas pipes, etc. before operation.
CAUTION
- Prevent unintentional starting.
- Remove pad wrench before connecting the tool to the air supply.
- Keep work area clean and well lit.
• Always ensure that the work piece to be sanded is firmly fixed. - Before changing abrasive always disconnect the air supply.
Additional safety warnings
- Read all instructions before using this tool. All operators must be fully trained in usage and safety of this tool.
- All maintenance must be carried out by trained personnel. For service, contact Mirka authorized service centre!
• Always wear required safety equipment (see warnings). - The operator must be in a secure position and have a firm grip and footing on a solid floor.
• Always ensure that the work piece to be sanded is firmly fixed. - Check tool, backing pad, hose and fittings regularly for wear.
• Always take care to ensure your safety at work; never carry, store or leave the tool unattended with the air supply connected.
• Vacuum unit dust collection bag should be cleaned or replaced daily. Dust can be highly combustible.
Cleaning or replacing of bag also assures optimum performance. - Do not exceed maximum recommended air pressure of 6.2 bar (90 psi).
• Take care to avoid entanglement of the moving parts of the tool with clothing, ties, hair, cleaning rags, etc. - Keep hands clear of the spinning pad during use.
- If the tool appears to malfunction, remove from use immediately and arrange for service and repair.
- Before changing abrasive always disconnect the air supply. Take care to properly attach and centre the abrasive on the backing pad.
Please Read and Comply with
1) General Industry Safety & Health Regulations, Part 1910, OSHA 2206, available from: Superintendent of Documents; Government Printing Office; Washington DC 20402.
2) Safety Code for Portable Air Tools, ANSI B186.1 available from: American National Standards Institute, Inc.; 1430 Broadway; New York, New York 10018.
3) State and Local Regulations.
Proper Use of Tool
This sander is designed for sanding all types of materials i.e. metals, wood, stone, plastics, etc. using abrasive designed for this purpose. Do not use this sander for any other purpose than that specified without consulting the manufacturer or the manufacturer's authorized supplier. Do not use backing pads that have a working speed less than 10,000 OPM free speed.
Work Stations
The tool is intended to be operated as a hand-held tool. It is always recommended that the tool be used when standing on a solid floor. It can be used in any position, but before any such use, the operator must be in a secure position and have a firm grip and footing, and be aware that the sander can develop a torque reaction. See the section "Operating Instructions".
Putting the Tool into Service
Use a clean lubricated air supply that will give a measured air pressure at the tool of 6.2 bar (90 psig) bar when the tool is running with the lever fully depressed. It is recommended to use an approved 10 mm (3/8 in.) x 8 m (25 ft) maximum length airline. It is recommended that the tool be connected to the air supply as shown in Figure 1.
Do not connect the tool to the airline system without incorporating an easy to reach and operate air shut-off valve. The air supply should be lubricated. It is strongly recommended that an air filter, regulator and lubricator (FRL) be used as shown in Figure 1 as this will supply clean, lubricated air at the correct pressure to the tool. Details of such equipment can be obtained from your supplier. If such equipment is not used then the tool should be manually lubricated
To manually lubricate the tool, disconnect the airline and put 2 to 3 drops of suitable pneumatic motor lubricating oil such as Fuji Kosan FK-20, Mobil ALMO 525 or Shell TORCULA® 32 into the hose end (inlet) of the machine. Reconnect the tool to the air supply and run the tool slowly for a few seconds to allow air to circulate the oil. If the tool is used frequently, lubricate it on a daily basis or lubricate it if the tool starts to slow or lose power. It is recommended that the air pressure at the tool is 6.2 bar (90 psig) while the tool is running. The tool can run at lower pressures but never higher than 6.2 bar (90 psig).
Operating Instructions
1) Read all instructions before using this tool. All operators must be fully trained in its use and aware of these safety rules. All servicing and repairs must be carried out by trained personnel.
2) Make sure the tool is disconnected from the air supply. Select a suitable abrasive and secure it to the backing pad. Be careful and center the abrasive on the backing pad.
3) Always wear the required safety equipment when using this tool.
4) When sanding always place the tool on the work then start the tool. Always remove the tool from the work before stopping. This will prevent gouging of the work due to excess speed of the abrasive.
5) Always disconnect the air supply from the sander before fitting, adjusting or removing the abrasive or backing pad.
6) Always adopt a firm footing and/or position and be aware of the torque reaction developed by the sander.
7) Use only correct spare parts.
8) Always ensure that the material to be sanded is firmly fixed to prevent its movement.
9) Check the hose and fittings regularly for wear. Do not carry the tool by its hose; always be careful to prevent the tool from being started when carrying the tool with the air supply connected.
10) Dust can be highly combustible. The vacuum dust collection bag should be cleaned or replaced daily. Cleaning or replacing the bag also assures optimum performance.
11) Do not exceed the maximum recommended air pressure. Use safety equipment as recommended.
12) The tool is not electrically insulated. Do not use where there is a possibility of coming into contact with live electricity, gas pipes, water pipes, etc. Check the working area before operation.
13) Take care to avoid entanglement of the moving parts of the tool with clothing, ties, hair, cleaning rags, etc. If entangled, it will cause the body to be pulled towards the work and moving parts of the machine and can be very dangerous.
14) Keep hands clear of the spinning pad during use.
15) If the tool appears to malfunction, stop using it immediately and arrange for servicing and repair.
16) Do not allow the tool to free-speed without taking precautions to protect any persons or objects from the loss of the abrasive or pad.

flowchart
graph TD
A["Air Dryer"] --> B["Regulator"]
B --> C["Lubricator"]
C --> D["Ball Valve"]
D --> E["Filter"]
E --> F["Regulator"]
F --> G["Ball Valve"]
G --> H["To Tool Station"]
H --> I["Drain Leg"]
I --> J["Ball Valve"]
J --> K["To Coupler at or near Tool"]
K --> L["Air Compressor and Tank"]
L --> M["Air Hose"]
M --> N["Air Air Flow"]
N --> O["Air Compressor and Tank"]
O --> P["Air Air Flow"]
P --> Q["Air Dryer"]
Q --> R["Air Compressor and Tank"]
R --> S["Air Air Flow"]
S --> T["Air Compressor and Tank"]
T --> U["Air Air Flow"]
U --> V["Air Dryer"]
V --> W["Air Compressor and Tank"]
W --> X["Air Air Flow"]
X --> Y["Air Dryer"]
Y --> Z["Air Compressor and Tank"]
Z --> AA["Air Air Flow"]
AA --> AB["Air Dryer"]
AB --> AC["Air Compressor and Tank"]
AC --> AD["Air Air Flow"]
AD --> AE["Air Dryer"]
AE --> AF["Air Compressor and Tank"]
AF --> AG["Air Air Flow"]
Technical data
| Mirka® OS 343CV 34 | 3DB 343NV | 353CV 35 | 3DB 383CV | 383DB | |||
| Recommended Airline Size - Minimum | 10 mm 3/8 in | ||||||
| Recommend Maximum Hose Length | 8 meters 25 feet | ||||||
| Air Pressure - Maximum Working Pressure | 6.2 bar 90 psig | ||||||
| Air Pressure - Recommended Minimum | NA | ||||||
Product Configuration/Specifications: 10,000 OPM Orbital Sander
| Product Configuration and Specifications: 10,000 OPM 70 mm x 198 mm (3 in. x 8 in.), 75 mm x 100 mm (3 in. x 4 in.) & 81 mm x 133 mm (3 in. x 5 in.)Orbital Sanders.Note: All vacuum machines use ∅ 28 mm (1 in.) Vacuum hose fittings standard. ∅ 19 mm (3/4 in.) is available. | |||||||||||
| Orbit Vac Type | Pad Size mm (in.) | Model Number | Product Net Weight kg (Pounds) | Height mm (in.) | Length mm (in.) | Power watts (HP) | Air Consumption LPM (scfm) | *Noise Level dBA | *Vibration Level m/s2 | *Uncertainty K m/s2 | |
| 3 mm (1/8 in.) | Central Vacuum | 70 x 198 (3 x 8) | OS383CV 0 | 96 (2.1) | 118 (4.65) | 248 (9.76) | 179 (0.24) | 453 (16) 75 3.3 | 0.83 | ||
| Self-Gen Vacuum | 70 x 198 (3 x 8) | OS383DB 0 | 97 (2.14) | 118 (4.65) | 261 (10.26) | 179 (0.24) | 453 (16) 85 2.8 | 0.77 | |||
| 3 mm (1/8 in.) | Central Vacuum | 75 x 100 (3 x 4) | OS343CV 0 | 72 (1.58) | 83.5 (3.29) | 202.4 (8.0) | 179 (0.24) | 453 (16) 72.5 | 2.80 0.77 | ||
| Self-Gen Vacuum | 75 x 100 (3 x 4 ) | OS343DB 0 | 72 (1.58) | 83.5 (3.29) | 208.9 (8.2) | 179 (0.24) | 453 (16) 80.5 | 2.02 0.70 | |||
| Non-vac | 75 x 100 (3 x 4 ) | OS343NV 0 | 70 (1.55) | 83.5 (3.29) | 139.3 (5.5) | 179 (0.24) | 453 (16) 76.0 | 2.60 1.30 | |||
| 3 mm (1/8 in.) | Central Vacuum | 81 x 133 (3 x 5) | OS353CV 0 | 85 (1.9) | 95 (3.7) | 217 (8.5) | 179 (0.24) | 453 (16) 76.5 | 3.23 0.81 | ||
| Self-Gen. Vacuum | 81 x 133 (3 x 5) | OS353DB 0 | 85 (1.9) | 95 (3.7) | 224 (8.8) | 179 (0.24) | 453 (16) 84.0 | 2.30 0.72 | |||
| The noise test is carried out in accordance with EN ISO 15744:2008 - Hand-held non-electric power tools -- Noise measurement code -- Engineering method (grade 2) and EN ISO 11203:2009 Acoustics-Noise emitted by machinery and equipment-Determination of emission sound pressure levels at a work station and other specified positions from the sound power level.The vibration test is carried out in accordance with EN ISO 28927-3, Hand-held portable power tools - Test method for evaluation of vibration emission - Part 3: Polishers and rotary , orbital and random orbital sanders. | |||||||||||
Specifications subject to change without prior notice.
*The values stated in the table are from laboratory testing in conformity with stated codes and standards, and are not sufficient for risk evaluation. Values measured in a particular work place may be higher than the declared values. The actual exposure values and amount of risk or harm experienced by an individual are unique to each situation and depend upon the surrounding environment, the way in which the individual works, the particular material being worked, work station design as well as upon the exposure time and the physical condition of the user. Mirka, Ltd. cannot be held responsible for the consequences of using declared values instead of actual exposure values for any individual risk assessment.
Further occupational health and safety information can be obtained from the following websites:
https://osha.europa.eu/en
http://www.osha.gov (USA)
Troubleshooting Guide
| Symptom Possible Cause Solution | ||
| Low power and/or low free speed. | Insufficient air pressure. Check air line pressure at the inlet of the Sander while the tool is running at free speed. It must be 6.2 Bar (90 psig/620 kPa). | |
| Clogged Muffler(s). Model: OS 70x198mm | See the “Housing Disassembly” section for Muffler removal. Replace Item 48, Muffler Insert (see the “Housing Assembly” section). | |
| Clogged Muffler(s). Model: OS 75x100mm | See the “Housing Disassembly” section for Muffler removal. Replace Item 46, Muffler Insert (see the “Housing Assembly” section). | |
| Clogged Muffler(s). Model: OS 81x133mm | See the “Housing Disassembly” section for Muffler removal. Replace Item 50, Muffler Insert (see the “Housing Assembly” section). | |
| Plugged Inlet Screen. Clean the Inlet Screen with a clean, suitable cleaning solution. If the Screen cannot be cleaned, replace it. | ||
| One or more worn or broken Vanes. Install a complete set of new Vanes (all vanes must be replaced for proper operation). Coat all vanes with quality pneumatic tool oil. See “Motor Disassembly” and “Motor Assembly”. | ||
| Internal air leakage in the Motor Housing indicated by higher than normal air consumption and lower than normal speed. | Check for proper Motor alignment and Lock Ring engagement. Check for damaged O-Ring in Lock Ring groove. Remove Motor Assembly and Reinstall the Motor Assembly. See “Motor Disassembly” and “Motor Assembly”. | |
| Motor Parts Worn. Overhaul Motor. Contact authorized Mirka Service Center. | ||
| Worn or broken Spindle Bearings. Replace the worn or broken Bearings. See “Shaft Balancer and Spindle Disassembly” and “Spindle Bearings, AirSHIELDTM and Shaft Balancer Assembly”. | ||
| Air leakage through the Speed Control and/or Valve Stem. | Dirty, broken or bent Valve Spring, Valve or Valve Seat. | Disassemble, inspect and replace worn or damaged parts. See steps 2 and 3 in “Housing Disassembly” and steps 2 and 3 in “Housing Assembly”. |
| Vibration/rough operation. Incorrect Pad. Only use Pad sizes and weights designed for the machine. | ||
MIRKA
(FI-66850 Jeppo, Finland)
電話:+358 20 760 2111

必要な個人用保護具
保護めがね 呼吸マスク
安全手袋 防音保護具

https://osha.europa.eu/en(유럽)
http://www.osha.gov(미국)
문제 해결 가이드
Stefan Sjöberg, Executive Vice President

Gebruiksaanwijzing
1) General Industry Safety & Health Regulations, Part 1910, OSHA 2206, disponível em: Superintendent of Documents; Government Printing Office; Washington DC 20402
2) Safety Code for Portable Air Tools, ANSI B186.1 disponível em: American National Standards Institute, Inc.; 1430 Broadway; New York, New York 10018
3) Regulamentações e legislações locais
https://osha.europa.eu/en (Avrupa)
http://www.osha.gov (ABD)
Declaration of conformityMirka Ltd.66850 Jeppo, Finlanddeclare on our sole responsibility that the products 70 mm x 198 mm (3 in. x 8 in.), 75 mm x 100 mm (3 in. x 4 in.) & 81 mm x 133 mm (3 in. x 5 in.) 10,000 OPM Orbital Sanders (See “Product Configuration/Specifications” table for particular model) to which this declaration relates are in conformity with the following standard(s) or other normative document(s) BS EN ISO 12100:2010, BS EN ISO 11148-8:2011, BS EN ISO 15744:2008, and BS EN ISO 28927-3:2009 in accordance with the Supply of Machinery (Safety) Regulations 2008.Jeppo 14.07.2021MIRKAI Place and date of issue CompanyStefan Sjöberg, CEO | |||
| Operator InstructionsIncludes – Parts Page, Parts List,Sander Spare Parts Kits, PleaseRead and Comply, Proper Use ofTool, Work Stations, Putting the ToolInto Service, Operating Instructions,Product Configuration/SpecificationsTables,Troubleshooting Guide. | ImportantRead these instruc-tions carefully beforeinstalling, operating,servicing or repairingthis tool. Keep theseinstructions in a safeaccessible location. | Importer InformationMirka (UK) LtdSaxon HouseShirwell CrescentFurzton LakeMilton KeynesMK4 1GATel. +44 (0)1908 866100 | ![]() |
| Manufacturer/SupplierMirka Ltd.66850 Jeppo, FinlandTel: + 358 20 760 2111 | Required Personal Safety Equipment Safety Glasses Breathing MasksSafety Gloves Ear Protection | ||
This chapter is an addition to the English language chapter of the manual in order to fulfill the UKCA regulation requirements. Please refer to the English language chapter for more information about your product.

geo
| Location | Marker | | -------- | ------ | | Mirka Ltd | Circle marker (black diamond) | | Finland | Circle marker (black diamond) |Mirka Ltd
Finland
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For contact information,
please visit www.mirka.com
Dedicated to the finish
MIRKA 04.06.2020 Jeppo
Place and date of issue CompanyStefan Sjöberg, CEO
Safety Glasses Breathing MasksSafety Gloves Ear Protection