Sometimes have had problems with drills or especially hard tap shanks slipping in keyless chucks. So when I had a bunch of keyless chucks laying around in the shop I decided to test them.
Results were partly surprising.
Tested with 6mm hardened shaft with chuck tightened to both ends, torqued until one of the chucks slips:
From worse to better:
8. 1.5-16mm San-Ou china cheapo keyed chuck
7. 13mm Rِhm 2-part plastic sleeve (possibly Extra-RV 80 but without carbide jaws)
6. 13mm Rِhm 1-part steel sleeve Extra-RV with carbide jaws
5. 13mm Matsushi-ta (older Panasonic cordless original) (edit: stupid censorship system)
4. 13mm Makita (only text to be found says Makita)
3. 10mm Yukiwa-Seiko (made in japan, came with little 10.8v makita)
2. 1-16mm keyless china cheapo bench drill chuck
1. 1.5-16mm San-Ou keyed chuck tightened with unreasonable 1 feet cheater bar
Results were partly surprising.
Tested with 6mm hardened shaft with chuck tightened to both ends, torqued until one of the chucks slips:
From worse to better:
8. 1.5-16mm San-Ou china cheapo keyed chuck
7. 13mm Rِhm 2-part plastic sleeve (possibly Extra-RV 80 but without carbide jaws)
6. 13mm Rِhm 1-part steel sleeve Extra-RV with carbide jaws
5. 13mm Matsushi-ta (older Panasonic cordless original) (edit: stupid censorship system)
4. 13mm Makita (only text to be found says Makita)
3. 10mm Yukiwa-Seiko (made in japan, came with little 10.8v makita)
2. 1-16mm keyless china cheapo bench drill chuck
1. 1.5-16mm San-Ou keyed chuck tightened with unreasonable 1 feet cheater bar
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