MECHANICAL PARTS - CHUCKS

Marathon Machine Tools has vast experience in installation of SMW-Autoblok air chucks, indexing chucks and hydraulic chucking systems. Our chucks are widely used in pipe threading operations and in machining different sizes of tees and crosses for the oilfield industry.

Please review our product selection and call us with your application need!

BIG BORE® INCH serration

Front-end pneumatic power chucks with extra large through-hole Ø 5.51” – 22” • standard jaw stroke • 3 jaws

End machining of long tubes with high clamping force at very short clamping cycles

Complete machine spindle bore can be used

Power chuck with built-in pneumatic cylinder. Force transmission via wedge hook.
Air feed via distributor ring and SMW-profile seals, at stopped spindle.
A twin non-return valve in the chuck maintains the air pressure during machining.
Clamping pressure level constantly checked by a safety control system (only for external clamping

3 jaw chuck
2 elbow unions G 3/8”
12 mounting screws (9 for the BB-N 400)
1 lifting eye bolt
1 set T-nuts with bolts
1 set soft top jaws
without distributor ring bracket

BIG BORE® ES INCH serration

Front-end pneumatic power chucks with extra large through-hole Ø 5.51” – 21” • extended jaw stroke • 3 jaws

End machining of long tubes with collars at high clamping force and very short clamping cycles, thanks to the rapid and the clamping stroke

Complete machine spindle bore can be used.

For outside clamping only.

Power chuck with built-in pneumatic cylinder.
Force transmission via wedge hook with 2 inclinations (for rapid and clamping stroke).
Air feed via distributor ring and SMW-profile seals, at stopped spindle.
A twin non-return valve in the chuck maintains the air pressure during machining.
Clamping pressure level constantly checked by a safety control system (only for external clamping
Clamping stroke control (no clamping in rapid stroke) is monitored.

3 jaw chuck
2 elbow unions G 3/8”
12 mounting screws (9 for the BB-N ES 400)
1 lifting eye bolt
1 set T-nuts with bolts
1 set soft top jaws without distributor ring bracket

BIG BORE® BBU-AZ-ES INCH serration

Front-end pneumatic power chucks with extra large through-hole Ø 8-5/8” – 14.37” • self centering or compensating clamping • extended jaw stroke • 3 jaws

End machining of straight or bent tubes.

Tubes can be clamped selfcentering or with radial jaw compensation at bent tubes, using a centering chuck.

No reduction of spindle bore due to selfcontained chuck design.

Built-in pneumatic cylinder for selfcentering or compensating clamping mode
Air feed for both functions via air distributor ring at stopped spindle
Built-in safety valve

Chuck with mounting bolts
1 set of T-nuts with bolts

AXN Automatic indexing chuck

Automatic indexing chucks Ø 8” – 26” • hydraulic clamping and indexing • divisions: 4 x 90° / 8 x 45° / 3 x 120° / 6 x 60° or specials • proofline™ = sealed chucks – low maintenance • 2 jaws

Fully automated and high productivity machining of components with orthogonal axis with 45°, 60° or 120° axis

High productivity for machining of work pieces like valve bodies, spiders or fittings (see below) at high position.

AXN: Automatic indexing chuck with hydraulic clamping and indexing

Rigid holding of the work piece at high revolutions allowing high chip removal rates
High positioning and repeatability precision
Reliable indexing system with constant oil lubricated internal mechanism
Constant and automatic in-process controls for extremely safe machining
Proofline = fully sealed/low maintenance
Components supplied on request
Adapter parts and clamping jaws

SMW CHUCK REPAIR AND REBUILD

Marathon Machine Tools offers air and indexing chuck rebuild services to its customers. A chuck rebuild can be part of a complete machine tool rebuild or an independent service work. Our qualified technicians completely disassemble the chucks and repair or replace worn out parts. Precision grinding services are also offered as part of a total reconditioning.