Broach Cutters
Last updated on
Wednesday, November 21, 2012 05:44:57 AM
Eastern US Time Zone
Broach Cutting Set, Broach Holder & Shim, Bushing, Cutting
Broach Cutting Set
A
duMont broach cutter
Precision Set 00.
There are 15 different combinations for making small keyways & bores.
Set consists of three broaches that cut 1/16", 3/32" & ⅛"
wide key ways &
five, Type A collared bushings for ¼",
5/16", ⅜", 7/16" & ½″
diameter holes.
The L-shaped shim is inserted after the first pass to increase the depth-of-cut.
Use plenty of cutting fluid & remove all chips after each pass.
Key & Keyway Sizes
Larger broaches. 3/16"-B
cutter with its ⅝"-B collared bushing. The 2nd one is a 5/16"-C cutter with a
standard
1-3/16"-C collared bushing & a 30mm-C collared bushing that is sized for the Jet
BD-920N lathe spindle pulley.
The various bushing Types (A, B, C) match the broach cutter base size with a
corresponding bushing channel.
The teeth cut progressively deeper.
Broach Holder & Shim
An adapter was made to hold
the broach
cutter to prevent breakage.
The holder has four, shank-gripping
setscrews (like a
4-jaw chuck).
A fifth setscrew, inside the (smaller)
½" diameter end,
limits shank depth &
movement under cutting pressures.
I use it in the floor drill
press.
Making a 3.25"
cross-slide
knob for the Jet 9x20 lathe.
Precision reamed 5/16" hole.
Bushing
A 5/16" guide bushing inserted into the hole.
Cutting
A 1/16" broach cutter held in the
floor drill press. Use
ample amounts of cutting fluid.
Perfect broach-cut 1/16" keyway to match the Taig OEM
design.
Handle installed on the improved 9x20 lathe
cross slide
using extra Taig mill lead screw parts.
Broach Cutting Set, Broach Holder & Shim, Bushing, Cutting