All Springer/NP/PCP Air Gun Discussion General > Engineering- Research & Development
Press Tonnage Requirement
Ronno6:
How much arbor press tonnage is required to press 7/32" roll pins?
Trying to come up with a better way to remove/install pump arm pivot pins in Crosman pumpers.....
Back_Roads:
Have you tried a modified chain breaker?
https://www.harborfreight.com/heavy-duty-chain-breaker-66488.html?
Ronno6:
--- Quote from: Back_Roads on November 13, 2021, 08:55:26 PM --- Have you tried a modified chain breaker?
https://www.harborfreight.com/heavy-duty-chain-breaker-66488.html?
--- End quote ---
Yup.
Being a cyclist and bike mechanic I have used those for years.
Removal is not the problem, but rather, installation.
The pump tube on the 2100/2200 etc. is 3/4" in diameter, and the spring pin is 7/8" long.
The chain break doesn't have near the combined capacity.
I am contemplating using a split shaft collar with a cross hole thru it to act as a guide, then using an arbor press to install the pin.
I just need to determine tonnage of the press.....
I am considering just using a dowel pin instead, This would be held in by the "clamshells" at the barrel bands.Those are surprisingly costly.........
Madd Hatter:
That chain breaker is for a motorcycle. I'd have to measure the reach of the breaker I have to be sure I think that one would be big enough.
mikeyb:
I have the 20 ton press from HF and have used it many times for vehicle repairs. Also used it many times to replace electric motor and other large shaft bearings. Used it once to straighten a badly bent 1" steel bar (a big bucket hinge pin) for work, but that seemed too easy for it. I think the only time I stressed it even a little bit was when rebuilding the rear end differential for an old Durango.
More recently I use it to straighten my Hatsan Edge trigger blades, but I think a 16oz hammer could do that job.
https://www.harborfreight.com/20-ton-shop-press-32879.html
Price has gone up as it was less than $150 on sale when I purchased mine a few years back. Now it is overkill for most of my home, hobby, and airgun use.
For your application and all of my current airgun needs, I think the 1 ton HF arbor press could be the ideal tool.
https://www.harborfreight.com/1-ton-arbor-press-3552.html
It is on my current holiday shopping list.
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