View Full Version : Help me identify a drill chuck taper.

04-30-2008, 06:17 PM
I have been given a Tauco Bench drill recently. The chuck however was damaged so I will be replacing it. However I don't know what taper the chuck arbour is.
The old chuck is a Jacobs and has no. 6A special stamped on it.

I have tried a chuck from my milling machine with a B16 taper on it but that doesn't seem to fit too well.

Can anyone help me identify the taper on the drill - are there measurements which would help me identify it?

04-30-2008, 06:49 PM

04-30-2008, 06:51 PM
The 6A is obsolescent, but it will probably be a standard Jacobs taper. What are the large and small diameters and length of taper?

04-30-2008, 06:53 PM
Excellent - thank you very much