mt4.5

[Matt SmithParticipant @mattsmith88420]

Hi there,

Do any of the forum members know of a supplier of the 4.5mt to 3mt spindle adapter sleeves? I noticed some older posts on the subject, are these still available?

Regards,

Matt.

[halfnutParticipant @halfnut]

You don’t see them much anymore. Not that hard to make though. Match the topslide to your lathe spindle taper with a DTI and turn the OD.

Then install it in the spindle taper and drill and bore the 3MT in situ.

Mild steel should be good enough for home use.

[DC31kParticipant @dc31k]

The ones that were around previously were commissioned by someone with a Harrison lathe. You will find further discussion on the Harrison group at groups.io

A 4.5 to 3 adaptor is available from Grizzly in the US as a spare part for one of their lathes. They do not ship overseas, but if you have a contact in the US, that is an option.

https://www.grizzly.com/parts/grizzly-spindle-sleeve-mt-4.5-mt-3/p97302912

The smart money would buy a 5 to 3 adaptor, dial in a male 3MT in a four jaw and then cut only the external 4.5 MT. Less and easier work than trying to cut an internal 3MT.

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