Screw machine replacement parts catalog and code reference drawings for Acme Gridley 3/4" RA-8 multi spindle screw machines. These code reference parts catalog and attachment layout drawing pages below identify and list replacement parts for National Acme built Acme Gridley 3/4" RA-8 automatic 8-spindle lathe screw machines.
This 3/4" RA-8 spare parts catalog section is currently under construction and some catalog pages or parts lists may not yet be active or available to view. Please check back again soon as we are continually expanding our multispindle online parts catalogs.
Feed change gears 100 teeth per set
1-7/8" bore, 10 pitch, 1.06" face
NUMBER OF TEETH | PART NUMBER |
26 | 33393 or NA12-26 |
28 | 33394 or NA12-28 |
30 | 33395 or NA12-30 |
32 | 33396 or NA12-32 |
34 | 38379 or NA12-34 |
36 | 33397 or NA12-36 |
38 | 38267 or NA12-38 |
40 | 33398 or NA12-40 |
42 | 38278 or NA12-42 |
44 | 33399 or NA12-44 |
46 | 38279 or NA12-46 |
48 | 38380 or NA12-48 |
50 | 330760 or NA12-50 |
52 | 38381 or NA12-52 |
54 | 38382 or NA12-54 |
56 | 38273 or NA12-56 |
58 | 38383 or NA12-58 |
60 | 33400 or NA12-60 |
62 | 38275 or NA12-62 |
64 | 38384 or NA12-64 |
66 | 33401 or NA12-66 |
68 | 38277 or NA12-68 |
70 | 330770 or NA12-70 |
72 | 38385 or NA12-72 |
74 | 33402 or NA12-74 |
Spindle speed gears 76 teeth per set
1-1/2"-6 spline, 10 pitch helical, 1.38" face
NUMBER OF TEETH |
PART NUMBER | RH OR LH |
20 | 70241 or NA12-20L | L |
22 | 330792 or NA12-22L | L |
24 | 33802 or NA12-24L | L |
26 | 333341 or NA12-26L | L |
28 | 330812 or NA12-28L | L |
30 | 330822 or NA12-30L | L |
32 | 333351 or NA12-32L | L |
34 | 70248 or NA12-34L | L |
36 | 333361 or NA12-36L | L |
38 | 333371 or NA12-38L | L |
38 | 70250 or NA12-38R | R |
40 | 333381 or NA12-40L | L |
40 | 70251 or NA12-40R | R |
42 | 332840 or NA12-42L | L |
42 | 70252 or NA12-42R | R |
44 | 333000 or NA12-44L | L |
44 | 70253 or NA12-44R | R |
46 | 333401 or NA12-46R | R |
48 | 333010 or NA12-48R | R |
50 | 333020 or NA12-50R | R |
52 | 333411 or NA12-52R | R |
54 | 70258 or NA12-54R | R |
56 | 70259 or NA12-56R | R |
58 | 333210 or NA12-58R | R |
60 | 330942 or NA12-60R | R |
62 | 330952 or NA12-62R | R |
64 | 330962 or NA12-64R | R |
66 | 330972 or NA12-66R | R |
68 | 330982 or NA12-68R | R |
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