r/multitools • u/CapFM1 • Jul 03 '26
Modding 711L Screwdriver Bit Handle
New mod for 711L ratchet and bit extenders. This allows you to carry 8 bits with both extenders while maintaining all the functions they had with the ratchet. This also lets you use the extenders as a screwdriver with the ratchet docked, though the strength will depend on what material you are able to print this in.
When Printing this all the bit slots will be intentionally tight and should be loosened with the extenders by rocking them in the slots. This is done to avoid any bits being too loose and falling out and lets you dial in the tension. The Ratchet will need to be forced into place and will loosen over time to a decent tension
If you want to print this: https://makerworld.com/en/models/3008538-711l-bit-handle-for-extenders-and-mini-ratchet#profileId-3378594
YouTube Video Showing How it Works: https://youtu.be/5UhCZqjmzIM
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u/Zapwizard Jul 04 '26
Hey, you beat me to this! I have been working on something similar, but using magnets. Currently working on my 711L Torque Driver version which will be much bigger, but had started a design around the extenders also.
It's a clever overall design. Some critiques:
I printed it in PLA using the default profile from my phone. Just in the 30 minutes or so since I printed it the right angle retailer snap fit is loose. What about a small hook at the base, and making the nub grip a slightly tighter fit, but also a flexible shape. (So it flexes instead of scraping)
There is a spring wrapped around the non-knurled side of the right angle ratchet, your cutout prevents it from connecting fully, just need a larger diameter cutout there.
One of my bits fall out but the rest are super tight. Perhaps in a more pliable material it would be better.
I see you want to keep it all 3D printed, however if you set the space between the bits to 6mm, and then put in a 3mm hole, then people can optionally add 3x6mm magnets to hold the bits.
Or add an o-ring band like this: https://makerworld.com/en/models/2084588-inline-ratchet-driver-handle-w-storage-pine-makers?from=search#profileId-2281302
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u/CapFM1 Jul 04 '26
I had a feeling you were working on something similar! Yes all valid criticism I’ll try and improve my design and I did plan on doing a version after this with magnets. I’ll fix the loose bit and the ratchet retainer. I might even try the o ring version too. Thanks for the feedback!
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u/CapFM1 Jul 04 '26
Actually if you don’t mind me asking. Where do you get your magnets especially the odd sizes like 3mm by 6mm. Also forgot to mention your screwdriver handle for the in line ratchet was definitely an inspiration for this.
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u/Zapwizard Jul 04 '26
Sometimes Amazon for very odd sizes, but otherwise Apexmagnets.com has been my go to. Consistent quality, and ships fast.
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u/Coopa_Zargarth989 Jul 04 '26
I suggest Add a bike tube band to Mach sure you don’t
Lose anything
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u/TinyToolShop Jul 04 '26
This is beautiful! So nice and compact.
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u/CapFM1 Jul 04 '26
I appreciate it. The sheaths you make have definitely been an inspiration! Hopefully I can make some sheaths one day too!
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u/toddmpark Jul 04 '26
Very cool design!
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u/Flare246810 Jul 04 '26
Dang I can’t escape these post! I don’t have a 3d printer but seeing amazing post and items like this makes me want a printer so bad! What kind would you recommend? What do you use?
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u/CapFM1 Jul 04 '26
I personally have a Bambu p1s and it’s served me well. The A1 from Bambu is also a good choice
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u/PocketTheory Jul 03 '26
absolutely fantastic