PD 250/E - Metal Lathe PROXXON - Free user manual and instructions
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| Product type | Metal lathe |
| Brand | PROXXON |
| Model | PD 250/E |
| Distance between centers | 250 mm |
| Height of centers | 70 mm |
| Height above bed | 43 mm |
| Clamping capacity (internal jaws) | 2 – 27 mm (max. 75 mm) |
| Clamping capacity (external jaws) | 25 – 71 mm |
| Cross slide travel | 60 mm |
| Top slide travel | 45 mm |
| Rotational speed | 400 – 1600 rpm (adjustable by belt) |
| Automatic feed | 0.05 or 0.1 mm/rev (depending on gears) |
| Metric threading | Pitch: 0.5 ; 0.625 ; 0.7 ; 0.75 ; 0.8 ; 1.0 ; 1.25 ; 1.5 mm |
| Bed material | Ribbed grey cast iron with polished prismatic guides |
| Chuck | 3-jaw (standard capacity 35 mm, max 68 mm with reversed jaws) |
| Tailstock | Yes, with MK1 taper |
| Chuck guard | With automatic motor cut-off |
| Noise level | May exceed 85 dB(A) – wear hearing protection |
| Included accessories | Rotating tailstock center, tool holder, tool set, set of change gears, timing belt |
| Power supply | Mains (230 V ~ 50 Hz estimated) |
Frequently Asked Questions - PD 250/E PROXXON
How to adjust the rotational speed?
Loosen the locking screw of the gearbox cover, then open the flap. Loosen the V-belt tensioner, move the belt to the desired pulley combination (see table on the cover), then retighten the belt. Close the flap. The speed range covers 25% to 100% of the base speed, e.g., from 400 to 1600 rpm.
How to change the chuck jaws?
Disconnect the power. Using the chuck key, move the jaws outward until they can be removed. Reverse or replace the jaws respecting the markings (numbers 1, 2, 3) to ensure centering. Reassemble the jaws in numerical order, then tighten the chuck with the key.
How to perform threading?
Mount the change gears according to the table for the desired pitch (e.g., 1.0 mm for M6). Clamp the workpiece and position the threading tool at 90°. Start the machine in forward, advance the tool with the cross slide and engage the automatic feed. After the desired length, switch off, retract the tool, and reverse the direction to return to the starting position. Repeat until the desired thread depth is reached.
How to use the automatic feed?
Ensure the machine is stopped. Turn the feed switch to the right to activate it. The bed then moves from right to left (in normal operation). To stop, turn the switch to the left. Ensure that the tool or bed does not touch the chuck or tailstock.
How to install the tailstock center in the tailstock?
Extend the spindle sleeve about 10 mm by turning the handwheel. Firmly insert the tailstock center (MK1 taper) into the sleeve. Tighten the sleeve clamping screw if necessary. To remove, turn the handwheel to the left until it stops, then force an extra turn to dislodge the taper.
How to adjust the guide clearance?
Loosen the lock nuts of the slide adjusting screws. With a hex key, tighten the adjusting screws evenly until play is eliminated. Hold the screws in position and retighten the lock nuts. Check that the slide moves easily and without play.
What accessories are available for the PD 250/E?
Optional accessories include: turning between centers attachment (no. 24014), 4-jaw chuck (no. 24036), collet chuck with collets (no. 24038), chuck mount (no. 24020), and a steady rest. These accessories allow drilling, milling, grooving, or machining of various shaped parts.
How to clean and maintain the lathe?
Always unplug the device before any maintenance. Remove chips with a brush or dustpan – do not use compressed air. Clean the exterior with a soft cloth and mild soap. Regularly lubricate all moving parts, spindles, and guides. Power cord replacement must be done by a professional.
What are the essential safety instructions?
Always wear safety glasses and hearing protection (noise level >85 dB(A)). Remove the chuck key after tightening. Do not wear loose clothing or jewelry. Ensure the chuck guard is down during work; the motor stops automatically if it is raised. Keep children away. Do not overload the machine.
How to calculate the required rotational speed?
Use the formula: Rotational speed (rpm) = (Cutting speed (m/min) × 1000) / (π × Workpiece diameter (mm)). Example: for a 20 mm diameter workpiece and a cutting speed of 50 m/min, the calculated speed is 796 rpm. Then set the next higher available speed (1600 rpm) and use the variator to lower it to the desired value.
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