Ran out of screws?

Ran out of screws?

This topic has 4 replies, 3 voices, and was last updated 12 August 2019 at 19:31 by Brian G.

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12 August 2019 at 18:12 #35582
Brian G
Participant
@briang
Cap screws instead of hex heads on DB10 Super chuck
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12 August 2019 at 18:12 #423782
Brian G
Participant
@briang
We tried fitting the independent 4-jaw that came with my son's lathe today.

The fact we hadn't discovered this until now shows that my doubts about the usefulness of his self-centring 4-jaw were nearly as mistaken as the bill of materials. Luckily I had some suitable hex head screws, so only a few minutes lost.

Brian
12 August 2019 at 18:20 #423784
old mart
Participant
@oldmart
Perhaps they forgot to counterbore the backplate.
12 August 2019 at 18:47 #423791
Howard Lewis
Participant
@howardlewis46836
Face enough off the capscrews, to dispense with the spacers, and allow the backplate to contact the Mandrel flange, and better engage the register?

After all, they are only going to removed / replaced on the odd occasion when the chuck is stripped for cleaning.

Howard
12 August 2019 at 19:31 #423801
Brian G
Participant
@briang
The spacers pass right through the mandrel with the nuts left in place Howard, and a rotating plate with three keyhole slots is used to retain the chuck. Without those caphead screws getting in the way the backplate is hard against the mandrel with a register protruding into the central hole. It is much more convenient than the more usual Chinese flange and nuts, taking well under a minute to swap chucks.

The 3-jaw uses hex head screws that have plenty of room in the recesses, and I used the same both on the self-centering chuck (with a modified Sieg SC6 backplate), and to replace these cap heads. As you said, they aren't going to be removed very often, and there is plenty of room to use a 13mm open end spanner.

Brian
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