Precision matthews PM-833TV

27
PM-833TV 4-13-21V1.indd Copyright © 2021 Quality Machine Tools, LLC
INSTALLING THE HEADSTOCK POWER FEED
The Precision Matthews Headstock Power Feed kit is specif-
ically engineered for the PM-833TV mill, Figure 1. Power re-
quired is 110V, 60 Hz.
Figure 1 Headstock (Z-axis) Power Feed unit
Installation of the headstock power feed is straightforward,
calling for only a small number of standard shop tools. A drill
press (with vise) is highly desirable for the accurate drilling
of two holes for roll pins. Except for the motor unit itself, plus
roll pins and 3 x 15 mm keys, Figure 3 shows the main parts
included in the kit.
Instructions in the manufacturer's manual do not apply to the
PM-833TV. Use the manual only as a reference for parts and
electrical.
Replacement
gear shaft &
extender
Power feed
stop assembly
Shims
Two sets of large and small shims in
4 thicknesses: 0.008", 0.16", 0.024",
plus 0.004" copper. The keyed spac-
er washer is 0.075". Also included:
1/4-20 x 1" cap screws, quantity 2.
Surplus These parts, if
included in the kit, are not
needed in this installation
Brass bevel gear & replacement collar
Gear shafts compared
Suggested procedure
1. Remove the Z-axis crank handle, together with the dial,
black knurled ring, and threaded (black) bushing, Figure 2.
Only the dial is reused.
2. Remove the main ange, with gear shaft, Figure 6.
3. Using a soft mallet, tap the gear shaft clear of the main
ange.
Figure 3 Parts supplied in kit
Replacement crank
handle (freewheels
when released)
Figure 2 Removed hand crank components