Hi all,

This afternoon my mini mill (a Chester Champion 16V, 2011 model) had a failure. I lost the ability to move the bed in one direction.

I soon striped the table down and found out I have a very worn cross slide nut. It’s demise has probably been brought forward by the previous owner not adjusting it properly and also my use of a drill as a power feed but let’s not cry about it.

I’m quite looking forward to making a replacement on my lathe, I have a lovely bit of bronze begging to be used. However I am struggling to identify what thread the leadscrew uses. Truth be told I don’t even know if it’s ACME or Trapezoidal. The manual contains no information, I could stick a new lead screw on there but it looks in fine condition. I cannot see any wear.

The diameter of the thread is 13.88mm, it’s 13tpi (counted with callipers, I have no thread gauge for this pitch).

I’m thinking it’s a TR14x2 thread, is there anyway to confirm before I order a tap and find out it’s of no use to me…

Thanks