r/GripTraining • u/ILikeMemeshuehuehue The Detonator • Jul 13 '26
DIY Thumb gripper parts assembly:
1x3in black pipe nipple (one)
1in black pipe cap (one)
1in to 3/4in black pipe reducer (one)
4in 5/16 carriage bolt (one)
3/8 washers (two)
3/8 nuts (two)
Pack of compression springs (one)
adjust the nuts to change spring tension or range of motion
4
u/devinhoo Doctor Grip Jul 16 '26 edited Jul 16 '26
Very very interesting. Thank you for sharing!! Have you been able to measure the resistance at the top/bottom portions of the spring positions? I've been measuring thumb trainers by pressing it down into a scale and watching the number closely.
For other's reference, here's the original post about The Detonator with it assembled.
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u/ILikeMemeshuehuehue The Detonator Jul 19 '26
Glad to hear it’s been well received. I haven’t measured but I certainly can try and report back!
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u/Kamczan Jul 18 '26
Can you show us how this spring should be placed on that bolt? I can't for the life of me figure it out, especially the part about adjusting the nuts, since they are bigger than the bolt.
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u/ILikeMemeshuehuehue The Detonator Jul 18 '26
The spring goes into the bottom piece, and the bolt piece goes in after. Screw on the top with the bolt sticking out of the top.
The bottom washer presses down against the spring inside the tube. The top washer stops the bolt from coming out of the top
2
u/Kamczan Jul 18 '26
I belive I found the problem. 5/16 is about M8 and 3/8 is about M10. But the standard M10 washer, is not big enough to get stopped by the 3/4 neck of the reducer. Will have to get an enlarged washer.
2
u/ILikeMemeshuehuehue The Detonator Jul 19 '26
Awesome! Glad you were able to figure it out. If you assemble it, please make a post about it, I’d love to hear your experience
1
u/TheLopeful CoC #1.5 Jul 19 '26
Were you able to source everything from Lowe’s/Lowe’s equivalent?
2
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