*myaeroexpo

NT-C_EN

Product catalog summary

Overview:
This document provides technical specifications and features of SMW-AUTOBLOK's high precision power chucks, specifically the NT-C series with sizes ranging from Ø170 to Ø400 mm. These chucks are designed for large batch production, high-speed machining, and handling fragile parts.

Specifications:

Available sizes: NT-C 170, NT-C 215, NT-C 260, NT-C 315, NT-C 400.
Number of jaws: 3.
Radial jaw stroke and axial piston stroke vary by model.
Max. draw pull and gripping force are specified for each model.
Max. speed ranges from 3200 to 6500 r.p.m. depending on the model.
Weight and moment of inertia are provided for each model.

Technical Features:

Centrifugal force compensation ensures consistent performance.
Chucks are fully sealed and require low maintenance due to proofline® technology.
Center bore available for coolant and/or air.
Chuck body and internal parts are case-hardened for durability.

Safety and Usage Recommendations:

When using taller or heavier jaws, reduce draw pull and rotating speed accordingly.
Static and dynamic gripping forces are measured with standard soft top jaws.
For internal clamping, reduce the draw pull by 30%.

Ordering Information:

Standard equipment includes a 3-jaw chuck and mounting bolts.
Ordering example provided: 3 jaw chuck NT-C 215 / A6.

Diagrams and Data:

Gripping force diagrams are included to illustrate performance across different speeds.
Detailed dimensional data and mounting specifications are provided for each model.

Conclusion:
The NT-C series chucks are engineered for precision and efficiency in demanding machining environments, offering robust features and safety measures to enhance operational performance.

Catalog excerpts

High precision power chucks Ø 170 - 400 mm ■ Centrifugal force compensation ■ Closed center ■ 3 jaws ■ proofline® chucks = fully sealed – low maintenance Application/customer benefits • For large batch production • For high speed machining and for fragile parts • Fully sealed, ideal for dry machining of castings and forgings or if high TONGUE & GROOVE pressure coolant is used NT-C: TONGUE & GROOVE master jaws (American Standard) Technical features • Centrifugal force compensation • Constant gripping force with permanent grease lubrication • Center bore for coolant and / or air • Chuck body and internal parts case hardened • proofline® chucks = fully sealed – low maintenance Standard equipment p ro o f l i n e s e r i e s ® fully sealed – low maintenance Ordering example 3 jaw chuck Mounting bolts Actual gripping force diagrams 235 220 FG Gripping force (total on 3 jaws) (kN) FG Gripping force (total on 3 jaws) (kN) The data in the diagrams refer to 3 jaw chucks, newly maintained according to their service manuals using SMW-AUTOBLOK K67 grease. The static and dynamic gripping forces have been measured using standard soft top jaws, placed in a position not exceeding the outer diameter of the chuck. Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly. Technical data SMW-AUTOBLOK Type Axial piston stroke Recommended actuating cylinders Max. speed Weight (without top jaws) * For internal clamping reduce the draw pull by 30%. on request: Tooling Standard

Open the catalog to page 1

High precision power chucks Ø 170 - 400 mm ■ Centrifugal force compensation ■ Closed center ■ 3 jaws ■ proofline® chucks = fully sealed – low maintenance TONGUE & GROOVE ISO-A Direct mounting Subject to technical changes. For more detailed information please ask our customer service. SMW-AUTOBLOK Type Max. Chuck open Max. / min. Chuck fully closed Radial jaw stroke

Open the catalog to page 2