Here is a list of all the postings Tim Reynolds 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Help with odd milling machine spindle taper|
Hi Tony, I know the post is quite old now but you may still be checking...….
I also have an Adcock & Shipley 1AD and it is similarly equipped with the mystery taper that you refer to. I believe it is known as '1 3/8" N.S.' (N.S. for 'Non Stick' and is described in British Standard BS 739: 1937 as '2 5/16" Nominal'. It is also described here:
I have searched for more than twenty years for tooling and turned up precisely nothing.
I think you have two options:
1) I have turned up an adapter to convert the taper down to 30 INT. I can then mount a 30 INT Autolock chuck. It's relatively easy to do although it may compromise the accuracy a little. The taper is the same gradient (7 in 24) in the two sizes.
2) There is a modern CNC fitting, BT35 that is close, a bit bigger but should fit. Again it's 7 in 24 gradient but due to the increased size,it may need a drive adapter to engage the drive pegs. There are many fittings available from Lyndex-Nikken in the States:
I'm hoping to be able to use a BT35 to 3MT adapter and then use standard MT tooling.
Stick with the 1AD! They're solid, well made and accurate and have survived the years well.
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