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Old 01-03-2018, 12:41 AM   #1 (permalink)
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Pump rod thread sizing???

Are the female ends that connect to the ram on the pump arm all 6/32? Regardless of year or manufacturer, or do they vary?

Just want to make sure the Resurrection ram rod will thread properly into the arm that I have. It threads on easily to all of my other rams, but the Resurrection ram gets difficult to turn after a few turns in, and I don't want to damage or cross thread anything.
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Old 01-03-2018, 08:36 AM   #2 (permalink)
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The "correct" thread for the 1/8" diameter ram shaft is 5-40. Some rams/pump arms are threaded 5-40 and others are threaded the "incorrect" 6-32 threads.

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Old 01-03-2018, 01:19 PM   #3 (permalink)
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So the safest bet without screwing up my new ram threads would probably get bolts with both threading and seeing which one works.

Time for a trip to Home Depot.
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Old 01-03-2018, 01:44 PM   #4 (permalink)
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You will have trouble locating 5-40 bolts. They are uncommon in general application stores.

If you have a set of calipers you could measure the ID of the hole or the OD of the rod to determine the size.

Thread chart links...

Internal (female)

External (male)

A 5-40 threaded hole should measure between .0979" and .1062", internally.
A 5-40 threader rod should measure between .1191" and .125", externally.

A 6-32 threaded hole should measure between .1040" and .1140", internally.
A 6-32 threaded rod should measure between .1312" and .1390", externally.

(If I somehow managed to misread those charts, please correct me... I am at work, without measuring tools to test with.)

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Old 01-03-2018, 06:05 PM   #5 (permalink)
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It's 5-40. The 6-32 bolt I used threaded in as much as the Resurrection ram did, so I am assuming (the mother of all F-ups) that it is 6-32 as well. I haven't been able to find any info on the Resurrection ram threading online, so it may be time to call Empire/KEE/G.I.Sports/Tippmann
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Old 01-04-2018, 09:24 PM   #6 (permalink)
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Probably best to just pick up a pump arm from empire. That will be the easiest route. Than you know your good to go. Thatís what I would do.


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Old 01-04-2018, 11:33 PM   #7 (permalink)
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The Resurrection pump arm is too short for a traditional mechanical cocker. I had already thought of doing that because it seemed to be a simple solution.
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Old 01-04-2018, 11:35 PM   #8 (permalink)
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Inception would probably work then. Designed by the same guy, at least.
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Old 01-14-2018, 01:44 AM   #9 (permalink)
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Well, I found a second email from GI Sports that I guess I never opened, and they state that the Resurrection ram is threaded "6-32 UNC-2A Thread". Extra pump arm I finally found in the parts bin was 6-32 as well, so there is my final answer.
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