Lathe SOW.pdf
PDF 202 KB Posted
- Attached to
- Colchester Lathe maintenance
- Solicitation number
- 70Z02426Q0000179
About this file
This is a Statement of Work (SOW) for maintenance and adjustment services on a Clausing Colchester lathe. The technician will perform eight specific service tasks to restore the lathe to proper operating condition.
The required services include: changing lubricants (5 gallons of Mobil DTE 24 and 1 gallon of Mobil Vactra No. 2); replacing drive belts by removing the headstock cover and rear guard, relieving tension, installing new belts, and re-tensioning the motor with clutch mechanism adjustment (1/8 turn clockwise recommended); leveling the lathe using a precision machinist level (.05MM) on the bed ways by adjusting feet or shims in both longitudinal and transverse directions; adjusting the headstock alignment to achieve minimal runout ideally under 0.0001"–0.0002" using a dial indicator; adjusting cross-slide backlash by modifying the brass nut mounting screws to reduce movement from approximately .100 inches to .020 inches or less; adjusting the clutch by running the lathe at 1,600 RPM for 30 minutes warm-up, then tapping the clutch collar to advance the adjustment pin through notch sequences one notch at a time; and adjusting the brake by holding the inner nut steady, loosening the outer lock nut, and tightening the inside nut clockwise to reduce braking time.
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Other files
| File | Type | Posted |
|---|---|---|
| Lathe SOW.pdf | ||
| DEI FAR Clause.pdf | ||
| Lathe WD.pdf | ||
| Clauses new.pdf |
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Text version
1. Statement of Work for Clausing Colchester Lathe. (SOW) The technician will provide these services:
CHANGE LUBRICANTS 5 GALLONS OF MOBIL DTE 24 and 1 GALLON OF MOBIL VACTRA NO. 2 DRIVE BELTS Access the Drive: Remove the top headstock cover and the rear guard to expose the countershaft and motor assembly. Relieve Tension: Release the variable speed control lever and turn the motor mount tension screw to slacken the belt. Remove Old Belt from the pulleys. Install New Belt: Place the new belt over the pulleys.
Adjust Tension: Re-tension the motor and, if necessary, adjust the clutch mechanism (1/8 turn clockwise is often recommended to tighten)
LEVEL LATHE Use a precision machinist level (.05MM) on the bed ways, adjusting the feet or using shims to ensure the lathe is level both longitudinally and transversely. The process involves placing the level near the headstock and tailstock, ensuring consistent readings across the bed.
ADJUST HEADSTOCK Aligning the lathe headstock involves loosening the mounting bolts and using adjustment screws to pivot the headstock, aiming for minimal runout (ideally under 0.0001"–0.0002") using a dial indicator.
Check the alignment with a test bar or by making test cuts, ensuring the headstock is parallel to the bed ways.
ADJUST BACKLASH OUT OF CROSS SLIDE Grasp the cross-slide at either end and try to slide it back and forth.
You will probably feel a movement of about .100 inches or more. By performing the adjustment described here you should be able to reduce this movement to about .020 or less.
The cross-slide lead screw engages with a rectangular brass nut attached to the underside of the cross-slide by two hex screws. A third hex screw presses against the top of the brass nut to adjust its height.
By adjusting this middle screw and the two mounting screws, you can adjust the brass nut to minimize backlash in the cross-slide.
ADJUST CLUTCH Warm-up: Some manufacturers suggest running the lathe for 30 minutes at roughly 1,600 RPM before adjusting to ensure the metal has expanded to its operating temperature. There will be a series of holes in the clutch collar. Begin to adjust the clutch by tapping it gently with the screwdriver. As you turn the clutch, the pin should fall into the next notch in the sequence. adjust the clutch by one notch at a time. The adjustment pin should reset at every step, requiring you to loosen it before adjusting it another notch.
ADJUST BRAKE Hold the inner nut steady and loosen the outer lock nut.
Tighten: Turn the inside nut clockwise. Even a half-turn can reduce braking time by approximately 1 second.
File details come from the government source that posted it. Updated .