SE70129 SHRINK FIT EXTENSION 12mm Shrink Fit Extension

SHRINK FIT EXTENSION | SE70129

Q: 1. What is a Shrink Fit Extension?

A Shrink Fit Extension is an attachment used to extend the reach of cutting tools in CNC machining. It uses shrink-fit technology to hold tools firmly and maintain high accuracy, even at longer overhangs. As a precision tools supplier in the USA, PAC Precision Tools provides extensions designed for stable and precise machining.

Q: 2. Why are Shrink Fit Extensions used in CNC machining?

They are used when tools need extra reach to access deep cavities, pockets, or hard-to-reach areas. Shrink Fit Extensions offer strong clamping, low runout, and excellent rigidity, helping maintain accuracy even during long-reach machining.

Q: 3. Are Shrink Fit Extensions suitable for high-speed machining?

Yes, they are balanced for high-speed operations and provide vibration-free cutting. This helps improve surface finish, reduce chatter, and extend tool life, making them suitable for precision machining and mold-making applications.

Q: 4. What tool shank sizes are supported by Shrink Fit Extensions?

They are compatible with standard h6 tolerance tool shanks. PAC Precision Tools USA offers various bore sizes to fit many carbide tools commonly used in CNC machining.

Q: 5. How do I install a tool into a Shrink Fit Extension?

Use a shrink-fit heating device to heat the extension, which expands the bore. Insert the tool, allow it to cool, and the shrink-fit mechanism will tightly grip the tool shank, providing exceptional holding force and accuracy.

Q: 6. How should I maintain a Shrink Fit Extension?

Clean the bore regularly, remove chips or coolant buildup, and store the extension in a moisture-free environment. Avoid overheating during shrink-fit cycles to maintain precision and prevent material fatigue.

Q: 7. Need help choosing the right Shrink Fit Extension?

For guidance, you can contact us here +1 262-282-2456 or email us at sales@pactoolsusa.com. As a CNC tools distributor in the USA, we can recommend the right extension size for your machine and application.

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$190.00

Chicago, USA Stock -

Canada Stock -

12mm Shrink Fit Extension

Specification

BoreSize: 12mm

ShankSize: 32mm

Delivery and Shipping

US Domestic Shipping Only: We ship exclusively within the United States using UPS as our primary carrier.
Processing Time: Orders are typically processed within 1–2 business days. Orders placed on weekends or holidays will be processed on the next business day.
Delivery Times: Delivery times vary based on the shipping method and destination (estimates are provided at checkout). Please note that carrier delays (e.g., weather or unforeseen issues) are beyond our control.
Costs & Methods: UPS Standard, Expedited, and Express methods are available. Shipping rates are calculated based on weight and destination at checkout.
Tracking & Support: Tracking information will be emailed once shipped. For tracking issues, errors, or damaged/lost packages, contact us at sales@pactoolsusa.com or +1 262-282-2456.

Description

Description

12mm Shrink Fit Extension

Accuracy

PAC Precision Tools Shrink Fit Extensions are designed to extend tool reach while maintaining high concentricity, rigidity, and clamping performance in high-speed CNC machining operations.

They are ideal for precision milling, finishing, and high-speed cutting where extended reach is required without compromising accuracy or stability.

Dimensions

Features

Balanced to 25,000 RPM at G2.5
High clamping force through thermal shrink technology
Excellent concentricity for extended tool reach
Superior rigidity to minimize deflection
Hardness: HRC 56–58
Case Depth: 0.8 mm ± 0.2 mm
Surface Roughness: Ra < 0.0005 mm
Engineered from premium case-hardened alloy steel
Available with through-coolant capability for improved chip evacuation and cooling

PAC Precision Tools, a Shrink Fit Extension distributor in the USA, provides secure tool holding, reduced vibration, improved surface finish, and extended tool life even in demanding high-speed machining environments. Designed for accuracy and stability, they are the ideal solution for deep cavity machining and precision applications.

Frequently Asked Questions

1. What is a Shrink Fit Extension? ▼

A Shrink Fit Extension is an attachment used to extend the reach of cutting tools in CNC machining. It uses shrink-fit technology to hold tools firmly and maintain high accuracy, even at longer overhangs. As a precision tools supplier in the USA, PAC Precision Tools provides extensions designed for stable and precise machining.

2. Why are Shrink Fit Extensions used in CNC machining? ▼

They are used when tools need extra reach to access deep cavities, pockets, or hard-to-reach areas. Shrink Fit Extensions offer strong clamping, low runout, and excellent rigidity, helping maintain accuracy even during long-reach machining.

3. Are Shrink Fit Extensions suitable for high-speed machining? ▼

Yes, they are balanced for high-speed operations and provide vibration-free cutting. This helps improve surface finish, reduce chatter, and extend tool life, making them suitable for precision machining and mold-making applications.

4. What tool shank sizes are supported by Shrink Fit Extensions? ▼

They are compatible with standard h6 tolerance tool shanks. PAC Precision Tools USA offers various bore sizes to fit many carbide tools commonly used in CNC machining.

5. How do I install a tool into a Shrink Fit Extension? ▼

Use a shrink-fit heating device to heat the extension, which expands the bore. Insert the tool, allow it to cool, and the shrink-fit mechanism will tightly grip the tool shank, providing exceptional holding force and accuracy.

6. How should I maintain a Shrink Fit Extension? ▼

Clean the bore regularly, remove chips or coolant buildup, and store the extension in a moisture-free environment. Avoid overheating during shrink-fit cycles to maintain precision and prevent material fatigue.

7. Need help choosing the right Shrink Fit Extension? ▼

For guidance, you can contact us here +1 262-282-2456 or email us at sales@pactoolsusa.com. As a CNC tools distributor in the USA, we can recommend the right extension size for your machine and application.

Official PDF Resource

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High-resolution technical drawings & dimensions
Comprehensive specifications for all series
Sizing charts & spindle compatibility guides

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Why Choose PAC Precision Tools USA?

PAC Precision Tool is a trusted supplier and distributor of reliable, durable, and high-precision tooling solutions in the USA. We support aerospace, automotive, woodworking, metalworking, and manufacturing industries with consistent accuracy and performance.

High-Accuracy & Durable

We maintain strict quality control to ensure every tool meets the highest industry standards, delivering consistent accuracy and performance.

Extensive Product Range

We supply a wide range of precision tools, including Collets, Tool Holders, Bushings, Retention Knobs, CNC Centers, and essential accessories.

Reliable Support

Backed by expert engineers and a customer-focused approach, we are committed to delivering outstanding support for superior performance.

Advanced Sourcing

Sourced from advanced global manufacturers, ensuring smooth operations, reduced downtime, and greater productivity every step of the way.

Our mission is simple: to be your most reliable partner in precision tooling, ensuring smooth operations, reduced downtime, and greater productivity every step of the way.

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