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MILLERS, THREAD

32" x 106" Lees-Bradner #HT12x102, extra lrg.cap.thread miller, tailstock, follow rest

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LEES BRADNER THREAD AND WORM MILLING MACHINE
MODEL #HT12x102
S/N #HT878
New:1941

SPECIFICATIONS:
Capacity between Centers 106"
Swing over Bed Ways 32"
Swing over Cutter Carriage (Max. Diam. Cap.) 20"
Min. Longitudinal Dist., Nose of Work Spindle to
Center of Cutter Swivel Head 7"
Max. Longitudinal Dist., Nose of Work Spindle to
Center of Cutter Swivel Head 60"
Min. Axial Distance, Centerline of Work Spindle
to Centerline of Cutter Spindle 0"
Max. Axial Distance, Centerline of Work Spindle
to Centerline of Cutter Spindle 9-1/12"
Floor Space 4'1"W x13'L
Net Weight 10,000 lbs.
Capacity thru Work Spindle, Follow Rest, & Collet 6"
Max. O/S Diam., Sgl(Disc Type) Thrd Milling Cutter 7"
Max. O/S Diam., Ring (Hob)Type Thrd Milling Cutter 3-7/8"
Min. Effective Root Diameter of Cutter 2-7/8"
Distance, Centerline of CUtter Spindle to Front
Face of Cutter Head 1-3/8"
Max. Width, ring type cutter, using std. cutter Spindle
and cutter spindle outer support, no offset of hub 1-1/4"
Bore of Cutter, for standard cutter spindle 1-3/4"
Required Keyway of Cutter for Std. Cutter Spindle 1/4"x 1/8" or
7/16"x 3/16"
Pitch of Lead Screw 1/2"
Cutter Spindle Speeds Achieved by Means of a Variable
Speed Drive with a 20/1 Ratio. Speeds from 50 RPM to
200 RPM, or 200 to 800 RPM
Internal Taper in extended Spindle (Available as an extra
for the generation of internal threads), to receive
shank type cutter or cutter arbors for shell type cutter No. 10 B & S
Number of holes in Standard Index Plate 24
Divisions available using standard index plate: 2,3,4,6,9,12,
16,18,24,32,36 and 48.
Min. Lead Generated, Worm & Wheel Dr/Spur Gear Dr. 1/16"/1/32"
Max. Lead Generated, Worm & Wheel Dr/Spur Gear Dr. 60"/1"
Ratio of final drive to work spindle, Worm & Wheel Dr. 24 to 1
Ratio of final drive to work spindel, Spur Gear Drive 4 to 1
Min. Work Spindle Spd, Worm & Wheel/Spur Gear Dr. 1/20th/1/6th
Max. Work Spindle Spd, Worm & Wheel/Spur Gear Dr. 4/8 RPM

* Arbor
* Follow Rest
* Milling Head Only
* Tailstock
* One setup of change gears


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