Thread: Whatisit ?

A hand turning device for a chuck?
But 3mt seems to big for that

Is there any feature in the end of the main shaft?

It's for turning valve seat and valve insert cutters by hand, it should have a 3/8" hole up the middle for pilots. Not a #3 MT, # 2 I think from memory.

+1 for valve seat cutter mandrel. They come in a variety of sizes dependent on the diameter of the cutter.
The hollow end is for fitting the dummy valve stem.

Roger

Mine has a bit of flight rust on it

I hope you don't mind Kenny, but you have started thread to good for me to ignore.

I got this with the Antrac, it is MT4, with a MT3 "inner". I'm guessing it is a floating reamer holder or something. It uses 3 ball bearings to lock the inner in place, which is fairly loose fit (1mm play maybe).

Ew

Originally Posted by Techo1

It's for turning valve seat and valve insert cutters by hand, it should have a 3/8" hole up the middle for pilots. Not a #3 MT, # 2 I think from memory.

on the money there. Used one hundreds of times,hard going with blunt cutters on stellite seats blisters plus. Cheers john.

Originally Posted by .RC.

Mine has a bit of flight rust on it

rusty cutter is a 70 deg throat cutter. 15 deg for crowning ,45 to true the seat and 70 deg to throat the seat. synchro seating made these redundant with a 1 hlf degree difference by grinding to make a nice narrow seat.Me being old school still like to lap in syncro seat meat a sharp clout of the valve on its seat and refit spring retainer and collets.I like a good show with blue to check that valve face is dead centre.is the seat that conducts the valve head heat build up not the stem.FYinfo John. cheers all.

Originally Posted by Ueee

I hope you don't mind Kenny, but you have started thread to good for me to ignore.

I got this with the Antrac, it is MT4, with a MT3 "inner". I'm guessing it is a floating reamer holder or something. It uses 3 ball bearings to lock the inner in place, which is fairly loose fit (1mm play maybe).

Ew

your guess is right Ewan.John.

Thanks guys for your answers.. I am now the proud owner of a handle !!

Cheers .. Ken.

Originally Posted by j.ashburn

is the seat that conducts the valve head heat build up not the stem.FYinfo John. cheers all.

John, would I be correct in assuming that with sodium cooled valves, it is the stem which conducts the heat away, rather than the seat? No personal experience with Sodium cooled valves, but I did have both Renault R10 and Honda motor cycle engines to overhaul, and as I recall, the spec called for 30°and 60° angles to be cut on the seats, with a narrow, (1/32" wide from memory) seat cut at 45°. Goodness, I was only 22 or 23 then.
And Kenny, the W&B is indeed Warren & Brown, they made heaps of valve and seat cutting gear in Australia, and were eventually taken over by Repco I believe, (or maybe Sidchrome, but I think Repco).
Rob.

Think W&B have been cut loose again more recently, (management buyout or something?) and their main business seems to be
communications and fibre optic technology. However, they still support spares for their workshop equipment, sell their torque wrenches and distribute a few lines of service tools. They have a fairly informative website worth a visit. Regards, Combustor.