How Shrink Fit Tooling Works

Shrink Fit tooling has been the leading choice for any high-speed machining operations. Although some argue that Collect Toolholder are better options, the reality still remains – Shrink Fit tool holders are the best tooling technology for high accuracy and top speed machining.

Shrink Fit Tooling Machine

With amazing features such as outstanding grip power, excellent balance,  good indicator reading, and more. Shrink fit tooling will help you get more work done in little time.
Using the Shrink fit tool holder will create a positive impact on your work as you’ll get high precision in all your projects, increase the lifespan of your tool and spindle, reduce the tool change time, and lower the cost of tool maintenance.
In fact, the shrink fit tooling enables you to create, build, and design customizable holders for all applications. The flexibility and high accuracy of this tooling system are phenomenal.
In this article, we’ll unravel the working formula of the Shrink fit tooling system. A detailed analysis of how this amazing tooling system works will be thoroughly elucidated.

How Shrink Fit Tooling Works

The concept of heat shrinking is being utilized in shrink fit tooling technology to clamp cutting tool shank in high-speed machining. This quick-change tool holding process in high-speed machining in highly efficient and it saves production time for the user.
This process is simple as the shank cutter tool is inserted into the shrink fit tool holder. The interior diameter of the shrink fit tool holder is manufactured to be a little smaller than the diameter of the shank cutting tool.

Working Mechanism

This interior bore of the tool holder is expanded by an input of heat from a heat source. As the bore increases to a sufficient size, the tool cutter automatically slides into the tool holder’s bore. At this point, cooling begins and the bore shrinks, exerting uniform pressure (about 10,000 lbs of force) on the surface of the cutting tool shank. This results in a tremendous gripping strength on the whole surface of the tool shank.


The reverse process is done when the tool is being removed. Shrink Fit Tooling technology makes it possible for tool change to be accomplished within seconds, reducing the tool changing time which in turn improves the productivity during high-speed machining.
Manufacturers find the shrink fit tooling system useful as they’re able to get more work done by reducing the time spent on tool changing. End users, on the other hand, can utilize this amazing technology to greatly increase their productivity.

Heating Systems Used in Shrink Fit Tooling Technology
The three Heating Systems used in shrink fit tooling technology are Open Flame, Induction heating, and hot air.
The Induction heating makes use of high-frequency current that flows through a metal coil. Here, the tool holder is inserted into the metal coil and an induced high-frequency eddy current heats it up as the temperature is greatly increased.

How Shrink Fit Tooling Works image of tools

Infrared temperature sensors are usually installed to monitor the temperature of the tool holder. This serves as a safety measure for the proper control of the tool holder’s temperature and regulating the current in the metal coil. The Induction heating is the best heating system available in the market.
Like the induction heating, the open flame and hot air systems function by heating the surface of the tool holder. The difference lies in the degree to which heat is supplied to the holder.
Unlike the induction heating, the hot air and open flame heat the holder more slowly leading to little temperature variations between the tool cutter and holder. These heating systems are relatively less expensive and more economical than the induction heating.
The cooling system found in the Shrink fit tooling system could be air or liquid filled coolants. These two cooling systems typically function through a 20k to 50k shrink/unshrink cycles.
The Shrink Fit Tooling System has amazing features which includes

Incredible Concentricity
The concentricity of the shrink fit tool is outstanding. The concentricity is below 3 microns. You’re guaranteed 0.00012″ (3 microns) run-out at three times the diameter of the cutting tool. With this high concentricity, the tool cutter and tool holder function like a single piece. This high level of accuracy is repeatable for all operators.

Incredible Balance
In the absence of moving parts, shrink fit holders offers the best balance repeatability of all tool holding system available. The shrink fit holders are designed with the highest accuracy balance standards of G 2.5 at 25,000 RPM. Special designs are also available at a tolerance level of G 1.0 at 30,000 RPM. This gives rise to increased feed rates, speeds, balanced chip loads, and better finishes.

Incredible Rigidity
The cutting tool is gripped 360 degrees on multiple planes around the shank. This results in an extremely high gripping torque that prevents any irregular movement of the cutting tool during roughing or finishing operations. This, in turn, results in the reduction of scrapped pieces.

Tool life Extension
The shrink fit tooling technology extends the tool life by over 100%. The incredible concentricity, gripping force, and balance helps you to increase productivity and ultimately extends the tool life by a wide margin.
Do you want a long lasting tool? Shrink fit tooling technology is highly recommended.

Extremely High-Speed Operation
The Shrink fit tooling is used for any high-speed machining operations. It’s clamping forced coupled with its superior system makes it the best choice for any high-speed machining operations.
Unlike the mill and hydraulic chucks, the shrink fit tooling offers extraordinary concentricity, making it outcompete other brands in the market.

Benefits of the Shrink Fit Tooling Technology
Shrink fit tooling is simply the best and some of its outstanding benefits are
1. Superb Accuracy.
2. High Gripping Torque.
3. Extension outlets that offer you diverse options with standard products.
4. Tool changing time reduction. Tool changing time is greatly reduced, making it possible to change tools within seconds. This, in turn, leads to greater productivity.
5. Setup Cleanliness leading to clean bores and less contamination. This is because the shrink fit tooling is designed to be a sealed system.
6. Outstanding Coolant Options. This aids in cooling and also helps to deliver fine finishing.
7. Cost Reduction. The cost of tool changing is greatly reduced by using this amazing shrink fit tooling system.
8. Availability. The Shrink fit tooling system is readily available and you can place an order. Having this tooling system guarantees quick tool changing and greater productivity.

Although other tool holders are available in the market, the shrink fit tooling makes it easier to change tools at a very fast pace. Thereby reducing the tool changing time as productivity is being increased.
As the most economical tool system, the shrink fit tooling increases tool life, reduces cost, and ultimately help manufacturers and end users get more work done.
As a plant manager, shop owner or manufacturer, the shrink fit tooling will be the best investment you’ll make and it’s guaranteed to boost your productivity.

2017-12-07T17:16:01+00:00 December 7th, 2017|Uncategorized|