9077SF - Grinder MAKITA - Free user manual and instructions
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| Product Type | Angle Grinder |
| Brand | Makita |
| Model | 9077SF |
| Power Source | 120V AC, 7.5 Amps |
| No-Load Speed | 11,000 RPM |
| Wheel Diameter | 4-1/2" (115 mm) |
| Spindle Thread | 5/8"-11 UNC |
| Weight | 4.5 lbs (2.04 kg) |
| Overall Length | 10-1/2" (267 mm) |
| Switch Type | Paddle switch with lock-off button |
| Side Handle | Reversible (Left/Right) |
| Spindle Lock | Yes |
| Protection Guard | Adjustable wheel guard |
| Brushes | Shoe-type, externally accessible |
| Housing | Aluminum gear housing |
| Maintenance | Regular brush inspection and gear grease replacement |
| Safety Compliance | UL listed, OSHA compliant with guard |
| Repairability | Spare parts available via Makita service centers |
Frequently Asked Questions - 9077SF MAKITA
How do I change the grinding wheel on the Makita 9077SF?
First, unplug the grinder. Press the spindle lock to hold the spindle, then use the wrench provided to loosen the lock nut. Remove the old wheel, place the new wheel onto the spindle with the proper flange, and tighten the lock nut firmly. Ensure the wheel is properly rated for the grinder's maximum RPM.
What size grinding wheel does the Makita 9077SF use?
The Makita 9077SF accepts 4-1/2 inch (115 mm) wheels with a 7/8 inch (22.23 mm) arbor hole. Always use wheels rated for at least 11,000 RPM.
Is the Makita 9077SF suitable for cutting metal?
Yes, with the appropriate cutting wheel. Use a 4-1/2 inch metal cutting disc rated for at least 11,000 RPM. Always use the guard and wear safety goggles.
How do I replace the carbon brushes?
Unplug the grinder. Remove the brush caps on both sides of the motor housing (usually with a flathead screwdriver). Pull out the worn brushes, insert new ones (Makita part #CB-22 or equivalent), and tighten the caps. Run the tool for a few minutes to seat the brushes.
What is the no-load speed of the Makita 9077SF?
The no-load speed is 11,000 rotations per minute (RPM). This high speed is ideal for grinding and cutting.
Can I use the grinder with one hand?
The grinder is designed for two-hand operation for safety. Always use the side handle to maintain control. The paddle switch requires constant pressure, reducing accidental starts.
How do I adjust the wheel guard?
Unplug the tool. Loosen the guard adjustment lever (often a screw or clamp). Rotate the guard to the desired position to direct sparks away from you, then re-tighten the lever securely.
What type of grease is recommended for the gear case?
Use Makita grease (part #196812-0) or a high-quality lithium-based grease. Disassemble the gear case, clean old grease, and apply a thin layer to the gears. Reassembly should be done carefully.
Why does my grinder spark excessively?
Excessive sparking may indicate worn brushes, a damaged commutator, or overloading. First, inspect and replace the brushes. If sparking persists, have the tool serviced by a qualified technician.
What safety precautions should I follow?
Always wear safety goggles, gloves, and a dust mask. Use the guard and side handle. Keep the power cord away from the rotating wheel. Never use a damaged wheel. Disconnect power before changing accessories.
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