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POWER DOWNFEED
Manufacturer's ref. Qty.
1
20102
2
20234
3
20243
4
20242
5
20241
6
7
20247
8
9
20239
10
20240
11
20244
12
20245
13
20203
14
20237
15
20236-2
16
20236-1
17
20231
18
20235
19
20232
20
20223
21
6003
22
20215
23
20220
24
20222
25
26
20304
27
28
20217
29
20218
30
20219
31
20221
32
20216
33
34
35
36
POWER DOWNFEED NOTES
Numbers in the following refer to the power downfeed
components list.
Quill travel
The quill is prevented from rotating by a dog screw lo-
cated on the left side of the gearbox casting (accessible
through a hole at lower right of the return spring hous-
ing). The dog screw (not shown on the parts diagrams)
also limits downward quill motion; it runs in a slot milled
in the outer wall of the quill, about 5 inches long. The
screw is screwdriver-adjustable, and is locked in place
by a 7 mm nut (use a thin-wall box wrench).
Power downfeed OFF
. If the power downfeed is OFF, handwheel 59 and
shaft 46 are stationary, holding worm gear 6 station-
ary.
PM-940M 0-206 v.indd
Description
1
Power feed gearbox
1
Quill pinion shaft
1
Depth collar
1
Clutch actuator
1
Ramp pin
1
Pin: 6 x 12
1
Ball-headed pin
2
Pin: 4 x 10
1
Clutch hub
1
Tabbed nut
1
Downfeed lever hub
2
Washer
2
Downfeed lever
1
Clutch base ring
1
Bushing
1
Worm gear (driven by #46)
Clutch dog
2
Screw
2
Spring
2
1
Shaft
2
Ball bearing
1
Sliding shaft (rate selection)
1
Spring
1
Pivoting key (gear picker)
2
Pin: 2 x 10
1
Worm gear (power feed input)
1
Key: 8 x 16
4
Washer
1
Gear
1
Gear
1
Gear
1
Collar
2
Screw: M4 x 6
1
Retaining ring: 35
Key: 4 x 8
2
Screw: M4 x 12
3
Manufacturer's ref. Qty.
37
20202
38
20201
39
40
41
42
43
20303
44
20206
45
20204
46
20233
47
20306
48
49
20228
50
20229
51
20230
52
20106
53
20227
54
20305
55
56
57
20107
58
20226
59
20105
60
61
62
63
20307
64
20301
65
66
67
20246
68
20308
69
70
71
2. In the Power-OFF mode, the quill can be operated
drill-press style provided levers 3 are pivoted inward.
Downward motion of the quill is stopped by pins 8, one
on the gearbox casting , the other on depth collar 3.
3. In the Power-OFF mode, the quill can also be po-
sitioned by the fine control handwheel, provided levers
3 are pivoted outward. Tongues on 3 (engaged in the
annular groove in 4) push clutch actuator 4 to the left;
the mitered end of 4 drives clutch dogs 7 apart to en-
gage the inner ratchet of worm gear 6. Quill motion is
now imparted by the handwheel, via output shaft 46 and
worm gear 6.
Power downfeed ON
4. The power downfeed system is turned ON by cam-
shaft 58 (Headstock-); this raises gear 40, same dia-
gram, to engage the smaller of the two spindle drive
33
Description
1
Pinion shaft (feed rate)
1
Knob, feed engage
1
Steel ball: 8
2
Retaining ring: 12
1
Spring
1
Screw: M6 x 20
1
Label disc
2
Knurled pin
1
Stop screw
1
Worm shaft
1
Bushing
1
Key
1
Gear
1
Gear
1
Gear
1
Bushing
Front cover
1
Bushing
1
Screw: M6 x 12
1
2
Screw: M6 x 25
1
Bushing
1
Feed dial
1
Handwheel
1
Handle
1
Screw: M5 x 8
1
Thumbscrew: M5 x 12
1
"0" plate
2
Knob
2
Rivet: 2 x 5
1
Oil cup
1
Special screw
2
Pin
1
Clamp lever
Screw: M6 x 50
4
Taper pin: 6 x 60
2
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