Techniks 21003-C | CAT40 Taper x 0.490" Diameter x 45 Degree Retention Knob

Description

Techniks 21003-C is a precision CAT40 retention knob made for secure retention in CAT40 taper holders. This ANSI C retention knob CAT40 coolant-style design accommodates coolant throughout systems and shop automation. The 45° seating angle ensures correct pull geometry for consistent toolholder clamping and concentricity. With a 0.490" neck diameter the retention knob provides a snug fit in CAT40 toolholders for repeatable runout control. Threads are 5/8-11 to match common drawbar standards and ensure reliable torque transfer during spindle clamping. A 0.740" knob diameter gives robust contact for drawbar engagement and longevity under cyclic use. Overall length is 1.50", offering the correct projection to engage modern CAT40 toolholders without interference. Manufacturers and maintenance teams value the Techniks 21003-C retention knob for predictable torque response. The knob’s ANSI C style provides corrosion resistance and dimensional stability in automated tool changes. The CAT40 retention knob torque behaviour integrates smoothly with factory torque settings and procedures. It is suitable for high-speed turning, milling, and automated toolchanger environments requiring secure retention. Use with CAT40 taper holders for optimal clamping performance and to reduce spindle-tool runout during machining. Techniks 21003-C retention knob performance reduces tool slippage risk and improves tool life across production runs. Replacement and inventory planning benefit from the standardized 5/8-11 thread and ANSI C form factor of this knob. Overall, the Techniks 21003-C is a durable, precision CAT40 retention component made for industrial CNC tooling systems.

Product Features and Benefits

ANSI C Coolant-Style Geometry

Techniks 21003-C features ANSI C coolant configuration for sealed coolant paths and compatibility with coolant-through CAT40 toolholders.

45° Seating Angle

The 45° angle ensures repeatable clamp geometry for secure engagement of the CAT40 45° retention knob 0.490".

5/8-11 Standard Threads

Standard 5/8-11 threads deliver secure drawbar connection and predictable techniks CAT40 retention knob torque response.

0.490" Neck Diameter

Precisely controlled 0.490 inch neck diameter for correct press-fit and accurate concentricity in CAT40 taper holders.

Robust 0.740" Knob Diameter

The larger 0.740" knob diameter provides durable contact area for long service life and reduced wear on the retention interface.

Frequently Asked Questions

What taper is the Techniks 21003-C made for?

The Techniks 21003-C is made for CAT40 taper holders and engineered to meet ANSI C coolant retention profiles.

What are the thread specifications of this retention knob?

The retention knob uses standard 5/8-11 threads for compatibility with common drawbar systems in CNC spindles.

How does the 45° angle affect clamping?

The 45° seating angle provides consistent clamp geometry to secure the toolholder and minimize runout under load.

What is the neck diameter of the Techniks 21003-C?

The neck diameter is 0.490", specified to fit and center within CAT40 toolholders precisely.

Is this a coolant-style retention knob?

Yes, the Techniks 21003-C uses an ANSI C coolant-style form, suitable for coolant-through toolholding systems.

Warning:

This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.

For more information, visit www.P65Warnings.ca.gov