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Atlas Air Powered Front Mount B42 Dead Length Collet Chucks

No Draw-Tube or Air Feed Tubes Required: for Lathes, Rotary Tables and Grinders: Series ATL207-B42

  • No Hydraulic System Required
  • No Draw Tube or Air Feed Tubes Restricting Spindle Bore
  • No Rear Cylinders and Cylinder Adapters
  • Low Cost
  • Easily Convert any Lathe or Grinder into a Production Machine
  • Ideal for Rotary Table Applications
  • Change from Collet Chuck to Standard Chuck Quick and Easy
  • High Speed 2500 RPM
  • High Accuracy Less Than .001” TIR
  • Repeats on Duplicate Parts Plus Minus .0015”
  • Dead Length Design
  • For Best Accuracy Use High Quality CRAWFORD COLLETS
  • Lever or Foot Pedal Actuated
  • Low Maintenance with Oil Mist Lubrication System
  • High Resistance to Coolant and Chip Penetration
  • Uses B42 Collets, Range 1/16″ (1mm) to 1-5/8″ (42.5mm)
  • Available in A, D, L, 4 Degree, Threaded and Straight Recess Mounting


ATL200 MANUAL 2020

Collet ChuckATL207-B42SpecificationsATL207-B42
Collet Chuck Order No. with Mount:
A197mm (7.76")Screw Hole/ MTG bolts11mm (0.43") x 3 - M10 xP1.5 x 3
B155mm (6.10")Collet TypeB42 Collets
Straight Recess Mount
Type A Mount
C42mm (1.65")Max. RPM2500
D4.5mm (0.18")Sleeve Stroke4mm (0.16")
Type D Mount
E138mm (5.43")Air Pressure3-8 kg/cm2 (42-114 psi)
F77mm (3.03")Through Hole Dia42mm (1.65")
Other Mounts
G146mm (5.748")Chuck Weight17kg (37 lbs.)
H172mm (6.77")Grip Force12,258 lbs @ 100 PSI
Collet Chuck Supplied with:
• 2 Filter Bars
• 2 Air Hoses
• 1 Fixing Bracket for Hoses
• 1 Hex Key
• Mounting Bolts
• Users Manual
NOTE: “E” shown is for model ATL207-B42 Collet Chuck with no mounting plate.
Add 3/4" to the “E” dimension for mounting plate. This will vary slightly depending on the mounting required. If an exact “E” dimension is required, consult factory.
OPTIONS: Order No: LEV100 Lever Control Package: (Includes: Lever Control, Line Filter, Lubricator and regulator.)
Order No: FOT200 Foot Pedal Control Package: (Includes: Foot Pedal, Line Filter, Lubricator and regulator.)