Barber Colman 6-16 gear hobber #5491

Machine specifications:

For Barber Colman 6-16 gear hobber


Maximum diameter work-piece............ 6"  (152.4mm)

Maximum diametral pitch (module)....... 16 DP  (1.6 module)

Maximum hob diameter................... 3"  (76mm)

Maximum length of hob.................. 3"  (76mm)

Maximum hob swivel range............... +/- 45-degrees

Maximum hob-shift travel............... 1.5"  (38.1mm)

Max. distance work-spindle face to  

tailstock center....................... 21.75"  (552.45mm)

Distance work-spindle face to  

centerline of hob-spindle, Max......... 18.75"  (476.25mm)

centerline of hob-spindle, Min......... 2.25"  (57.15mm)

Distance centerline of work-spindle to 

centerline of hob-spindle, Max......... 3.375"  (85.725mm)

centerline of hob-spindle, Min......... 0.25"  (6.35mm)

Maximum Hob Slide Travel............... 16.5"  (419mm)

Hob Speeds, Range...................... 133 to 533 rpm

Feeds, Range, Inch Per Revolution...... .015 to .150 IPR

Work-spindle overall diameter.......... 3.625"  (92.075mm)

Counter-bore diameter.................. 1.75/1.7515"

Counter-bore diameter.................. (44.45/44.4882mm)

Bore diameter for shafts 12"  

(304.8mm)length........................ 1.5"  (38.1mm)

Bolt circle diameter................... 3"  (76mm)

Index worm gear pitch diameter......... 5.7"  (144.7mm)

Max./Min. number of teeth cut.......... 300 to 4 teeth

Main drive motor....................... 2 HP1200 rpm

Coolant pump motor..................... .25 HP  3600 rpm

Lubrication pump motor................. 1/20 H  1800 rpm

Machine overall length................. 71.5"  (1803mm)

Machine overall width.................. 20.07"  (510mm)

Machine overall height................. 70"  (1778mm)

Machine overall weight (approx.)....... 2,750Lbs(1,250 kG)


Machine equipped with

hob arbor

end bearing

work arbor

change gears