ER Collet Chuck Pt. 3

[DaveH]

I made this D1-4 adapter plate a while ago.
   

This ER 25 collet chuck I’m making will fit directly on to the adapter plate.
It is shown in 2 parts Part A & Part B

Part A

A drawing showing what I am going to make.
   

Started with a piece of bar stock 100mm diameter.
   

Turned a portion down to rough size +3mm. So I can hold in the normal 3 jaw mode.
   

Now it can be turned around to face and cut the register.
   

Faced
   

Now to cut the register. This is bored out 55mm diameter x 4mm deep.
Whenever I do a recess like this register I tend to drill a small hole, helps with the boring. (Just me)
This part of the operation is very important. The register needs to be right, constant checking is required, be patient and careful.
   

Here is the register bored out – just possible to see the tip of the hole that was drilled.
   

All the time I was checking that it’s mating part would just fit, just fit, and only just fit, – as tight and as close as you can.
This is a very important part of the operation, it needs to be done with luv and care. They should just go together with no perceptible play.
   

Just cleaned up a little and a chamfer
   

Now it is over to the mill to drill and counter bore 3 holes.
Continued in Part B


DaveH