Paul, is the RB part a comparable product. A casting versus billet
 CNC with what looks like a replaceable insert.

 Steve Carlisle

 No but the RB housings works on the TTC. And they are lighter.

 IMHO cast iron is not the best. The best would be 4130 Heat Treated
 and hard chrome plated.

 Paul Lamar

Hi Paul,
I spoke to Promaz a few hours ago and they are working on aluminum rear
housings now and expect the first next week. They are planning center
housings next and expect the whole set in about 3 months. The large 20B
center housing is scheduled for production later in the year. The cast iron
insert is hardened but Promaz did not say what hardening process is used.
Maybe if we made our own 4130 insert, Promaz would install it. I can ask
later when they sort out their present engineering plans.
Rs,
Dave Mccandless  in Perth

Just a thought,
The RB side plates have been around for some time and are tried and tested.
Not so many in aircraft but plenty in race cars and drag cars.
Cast iron can be induction hardened as many of the older lathe beds were, it
can also be chilled hardened as used for blasting media.
Andrew Campbell.


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