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Pratt Burnerd/Atlas Rotary 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

PRATATLAS ATLB42 ROTAIR COLLETCHK TECHSPEC DIMDWR.png
New Field
Collet Chuck
ATL207-B42
Specifications
ATL207-B42-1
Collet Chuck Order No. with Mount:
A
197mm (7.76")
Screw Hole/ MTG bolts
11mm (0.43") x 3 - M10 xP1.5 x 3
ATL207-B42
B
155mm (6.10")
Collet Type
B42 Collets
Straight Recess Mount
C
42mm (1.65")
Max. RPM
2500
Type A Mount
ATL207-B42A5
ATL207-B42A6
ATL207-B42A8
D
4.5mm (0.18")
Sleeve Stroke
4mm (0.16")
Type D Mount
E
138mm (5.43")
Air Pressure
3-8 kg/cm2 (42-114 psi)
ATL207-B42D4
ATL207-B42D5
ATL207-B42D6
ATL207-B42D8
F
77mm (3.03")
Through Hole Dia
42mm (1.65")
Other Mounts
G
146mm (5.748")
Chuck Weight
17kg (37 lbs.)
ATL207-B4244-4�-Taper
ATL207-B4245-2-3?16-10
ATL207-B4246-2-3?8-6
H
172mm (6.77")
Grip Force
12,258 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.)

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