Automatic Tool Clamping
Our Tool clamping products are now also available in our onlineshop!
In our onlineshop you will find our extensive range of Rotary Unions, Tool Grippers, Unclamping Units, Collets, Clamping Chucks and much more.
We are now offering our range of tool clamping products in our onlineshop!
There you can find Rotary Unions, Tool Grippers, Unclamping Units, Collets, Clamping Chucks and more.
Reliability, safety and a long service life are the main requirements for a tool clamping system. It is also important that the clamping systems can be individually adapted to the specific customer requirements. In this respect, SK and HSK are standardized interfaces for tool change.
With the help of our reliable suppliers, we offer you a wide range of products in the field of tool clamping technology. You can find a part of the assortment directly in our onlineshop. If you have any questions, please do not hesitate to contact us. Simply use our contact form.
SK Clamping Sets
The steep taper is the original among tool interfaces and is still often used today in the machine tool industry for automatic tool change. The SK technology has already proven itself for several decades and is still a practical solution for standard machine tools despite
the increasing spread of the HSK interface.
Here, clamping in the machine tool spindle takes place via a tightening bolt. The shaft is centered in the sleeve exclusively via the taper surface. As a result, the use of the steep taper adapter is limited to a speed of 12,000 rpm. The most common form of steep taper is the DIN 69871 Form A with trapezoidal groove and orientation groove. The main features of an SK tool clamping system include:
- Tightening bolt
- no face contact
- wide distribution
- simple manufacturing
- self centering
There are 6 main sizes: SK 30, SK 35, SK 40, SK 45, SK 50, SK 60. Although the SK interface allows automatic tool change, it is not able to fully exploit the possibilities of modern machine tools. At high revolutions, the spindle mandrel loses stability, concentricity, power transmission and positional accuracy. In addition to chatter marks on the surface of the workpiece, this also results in reduced dimensional accuracy on the component and shortened tool life. Due to these shortcomings, the hollow shank taper system (HSK) was developed.
In our product range, we offer various SK tool clamping sets from renowned manufacturers, such as OTT-JAKOB Spanntechnik or Ortlieb Präzisionssysteme GmbH & Co. KG.
SK Clamping Sets
The steep taper is the original among tool interfaces and is still often used today in the machine tool industry for automatic tool change. The SK technology has already proven itself for several decades and is still a practical solution for standard machine tools despite the increasing spread of the HSK interface.
Here, clamping in the machine tool spindle takes place via a tightening bolt. The shaft is centered in the sleeve exclusively via the taper surface. As a result, the use of the steep taper adapter is limited to a speed of 12,000 rpm. The most common form of steep taper is the DIN 69871 Form A with trapezoidal groove and orientation groove. The main features of an SK tool clamping system include:
- Tightening bolt
- no face contact
- wide distribution
- simple manufacturing
- self centering
There are 6 main sizes: SK 30, SK 35, SK 40, SK 45, SK 50, SK 60. Although the SK interface allows automatic tool change, it is not able to fully exploit the possibilities of modern machine tools. At high revolutions, the spindle mandrel loses stability, concentricity, power transmission and positional accuracy. In addition to chatter marks on the surface of the workpiece, this also results in reduced dimensional accuracy on the component and shortened tool life. Due to these shortcomings, the hollow shank taper system (HSK) was developed.
In our product range, we offer various SK tool clamping sets from renowned manufacturers, such as OTT-JAKOB Spanntechnik or Ortlieb Präzisionssysteme GmbH & Co. KG.
Manufacturer article number: 9510410822
Manufacturer article number: 9510154032
Manufacturer article number: 9510135632
Manufacturer article number: 9510148532
HSK Clamping Sets
The hollow shaft-taper is standardized in DIN 69893. This is a development of the steep taper system, which has become more and more widespread in industrial applications in recent years. The suitability of the HSK tool clamping set for high spindle speeds and the possibility of a fast tool change has helped the HSK interface to gain a position of precedence over the SK interface. In direct comparison to the SK interface, the HSK interface has significantly higher radial and axial rigidity. The bending stiffness is also significantly greater. Further advantages can be seen in the lower mass and overall length. This leads to simplified and faster tool changes.
We carry many different HSK clamping sets in our product range. Below you will find the different types of OTT-JAKOB Spanntechnik GmbH and Ortlieb Präzisionssysteme GmbH & Co. KG.
HSK Clamping Set types of OTT-JAKOB Spanntechnik GmbH
Typ B
Type B was developed specifically 
for the special demands of the automotive industry. This high performance clamping set meets the requirements of fast and often tool changes. With the help of the positive guidance, parallel displacement of the collets is possible even under difficult operating conditions. The optimized DLC coating achieves the longest possible service life. At the same time, the reduced friction leads to a higher transmission ratio.
Typ C
The HSK variant of type C is suitable for very short tool changing times. The integrated holding function ensures minimization of waiting times during the tool changing process. Similar to type B, the high-quality, optimized DLC coating also ensures long-lasting wear resistance.
Typ D, K and BK
HSK type D is based on type B and offers an even higher transmission ratio with identical internal contour.
Type K represents the most cost-effective solution among the clamping sets. It is mainly used as a basic design in standard applications. Due to the high-quality coating, a long service life can be achieved.
The HSK variant of type BK is used for short spindle lengths.
HSK Clamping Set types of Ortlieb Präzisionssysteme GmbH & Co. KG
ToolGrip HSK
ToolGrip HSK clamping sets have been specially designed for heavy milling and
and HSC machining. They allow significantly higher clamping forces than those recommended by the DIN 69893 standard. In addition to the high clamping forces, its advantages include its short overall length, simple and maintenance-friendly design, and large cooling lubricant passage. The vulcanized 6-piece clamping fingers are designed for a product service life of up to 2 million load cycles. It is possible to increase the service life up to 3 million clamping cycles by a WCH coating.
For maintenance-free operation under the highest loads, the ToolGrip HSK tool clamp with ceramic is the right choice. After initial lubrication, this reliably clamps up to 5 million load cycles without loss of clamping force.
For an even faster tool change, there is the ToolGrip HSK tool clamp with holding function, which holds the released tool in the machine spindle until the tool changer pulls the tool out.
UniGrip HSK
The UniGrip HSK tool clamping set enables highest speeds up to 40,000 min-1. It consists of 8 clamping fingers and a spring retainer which holds the clamping fingers in position. This clamping set is also available as coated or holding version as well as in ceramic.
HSK Clamping Sets
The hollow shaft-taper is standardized in DIN 69893. This is a development of the steep taper system, which has become more and more widespread in industrial applications in recent years. The suitability of the HSK tool clamping set for high spindle speeds and the possibility of a fast tool change has helped the HSK interface to gain a position of precedence over the SK interface. In direct comparison to the SK interface, the HSK interface has significantly higher radial and axial rigidity. The bending stiffness is also significantly greater. Further advantages can be seen in the lower mass and overall length. This leads to simplified and faster tool changes.
We carry many different HSK clamping sets in our product range. Below you will find the different types of OTT-JAKOB Spanntechnik GmbH and Ortlieb Präzisionssysteme GmbH & Co. KG.
HSK Clamping Set types of OTT-JAKOB Spanntechnik GmbH
Typ B
Type B was developed specifically for the special demands of the automotive industry. This high performance clamping set meets the requirements of fast and often tool changes.
With the help of the positive guidance, parallel displacement of the collets is possible even under difficult operating conditions. The optimized DLC coating achieves the longest possible service life. At the same time, the reduced friction leads to a higher transmission ratio.
Typ C
The HSK variant of type C is suitable for very short tool changing times. The integrated holding function ensures minimization of waiting times during the tool changing process. Similar to type B, the high-quality, optimized DLC coating also ensures long-lasting wear resistance.
Typ D, K und BK
HSK type D is based on type B and offers an even higher transmission ratio with identical internal contour. Type K represents the most cost-effective solution among the clamping sets. It is mainly used as a basic design in standard applications. Due to the high-quality coating, a long service life can be achieved. The HSK variant of type BK is used for short spindle lengths.
HSK Clamping Set types of Ortlieb Präzisionssysteme GmbH & Co. KG
ToolGrip HSK
ToolGrip HSK clamping sets have been specially designed for heavy milling and
and HSC machining. They allow significantly higher clamping forces than those recommended by the DIN 69893 standard. In addition to the high clamping forces, its advantages include its short overall length, simple and maintenance-friendly design, and large cooling lubricant passage. The vulcanized 6-piece clamping fingers are designed for a product service life of up to 2 million load cycles. It is possible to increase the service life up to 3 million clamping cycles by a WCH coating.
For maintenance-free operation under the highest loads, the ToolGrip HSK tool clamp with ceramic is the right choice. After initial lubrication, this reliably clamps up to 5 million load cycles without loss of clamping force. For an even faster tool change, there is the ToolGrip HSK tool clamp with holding function, which holds the released tool in the machine spindle until the tool changer pulls the tool out.
UniGrip HSK
The UniGrip HSK tool clamping set enables highest speeds up to 40,000 min-1. It consists of 8 clamping fingers and a spring retainer which holds the clamping fingers in position. This clamping set is also available as coated or holding version as well as in ceramic.
Manufacturer article number: 9560003626
Manufacturer article number: 9560003326
Manufacturer article number: 9560011336
9560000436
9560005226V02
Manufacturer article number: TGC48-16
Rotary Unions
Rotary Unions are 
important machine elements,that transfer liquid or gaseous media from a stationary to a rotating component. With the help of Rotary Unions, it is possible to conduct different types of media through the spindle. A common application is the passage of cooling lubricant to supply an internally cooled tool. In addition, other media such as hydraulic oil, cooling water or compressed air can also be fed into the shaft.
In our product portfolio you will find various single or multi-channel Rotary Unions from OTT-JAKOB Spanntechnik GmbH for use with hydraulics, air, cooling lubricant, MMKS, internal spindle cooling and for cryogenic machining.
Rotary Unions
Rotary Unions are important machine elements,that transfer liquid or gaseous media from a stationary to a rotating component. With the help of Rotary Unions, it is possible to conduct different types of media through the spindle. A common application is the passage of cooling lubricant to supply an internally cooled tool. In addition, other media such as hydraulic oil, cooling water or compressed air can also be fed into the shaft.
In our product portfolio you will find various single or multi-channel Rotary Unions from OTT-JAKOB Spanntechnik GmbH for use with hydraulics, air, cooling lubricant, MMKS, internal spindle cooling and for cryogenic machining.
Rotary Unions by OTT-JAKOB Spanntechnik GmbH
1-Channel Oil
The 1-channel oil rotary union is mounted directly on the spindle shaft and offers a low-cost alternative to hydraulic release of clamping systems.
2-Channel
The 2-channel rotary unions provide a supply of hydraulic oil for releasing the clamping system on one channel, as well as the supply of another medium on the second channel. They are mounted directly on the spindle shaft.
1-Channel GD / 1-Channel GDP
Rotary unions of the types 1-channel GD and 1-channel GDP are characterized by permanently closed sealing surfaces (GD). In addition to the use of all common media, the unique seal set also allows unrestricted dry machining and reduces the amount of leakage to a minimum. The integrated hybrid bearings have low coefficients of friction as well as a longer grease operating life, thus ensuring a long service life at high speeds. With the help of the labyrinth seal, the bearing is effectively protected against contamination, which additionally contributes to a long life expectancy. For easy installation, 360° rotation is possible. All GD rotary unions are available with radial and axial connection. Optimum availability is guaranteed by calculable maintenance cycles.
Rotary Unions by OTT-JAKOB Spanntechnik GmbH
1-Channel Oil
The 1-Channel Oil Rotary Unions is mounted directly on the spindle shaft and offers a low-cost alternative to hydraulic release of clamping systems.
2-Channel
The 2-Channel Rotary Unions provide a supply of hydraulic oil for releasing the clamping system on one channel, as well as the supply of another medium on the second channel. They are mounted directly on the spindle shaft.
1-Channel GD / 1-Channel GDP
Rotary unions of the types 1-channel GD and 1-channel GDP are characterized by permanently closed sealing surfaces (GD). In addition to the use of all common media, the unique seal set also allows unrestricted dry machining and reduces the amount of leakage to a minimum. The integrated hybrid bearings have low coefficients of friction as well as a longer grease operating life, thus ensuring a long service life at high speeds.
With the help of the labyrinth seal, the bearing is effectively protected against contamination, which additionally contributes to a long life expectancy. For easy installation, 360° rotation is possible. All GD rotary unions are available with radial and axial connection. Optimum availability is guaranteed by calculable maintenance cycles.
Manufacturer article number: 9525003320
Manufacturer article number: 9510089742
Manufacturer article number: 9525002130
Rotating unions for cooling lubricants by Deublin GmbH
Bearingless rotary unions
The bearingless rotating union demonstrates great compactness and allows for high speed since no bearings are installed, thus reducing overall costs. The standard Deublin designs are available in different versions to suit any machining application. PACH Systems offers the following designs of Deublin rotary unions:
- 1117 Series, 1121 Series, 1124 Series, 1139 Series, 1151 Series, 1154 Series, 1159 Series
Housing supported rotary unions
If release units are equipped with location holes, they require a housing-supported rotary union. This has a leakage line which diverts the leakage and thus prevents flooding of the spindle. PACH Systems distributes the following versions of the housing-supported rotating unions:
- Series 1109, Series 1111, Series 1114
Rotor supported rotary unions
This type of rotating union is attached directly to the machining center with the threaded motor. This facilitates installation and absorbs the pressure load caused by the cooling lubricant. The following series are available from PACH-Systems:
- 1005 series, 1101 series, 1109 series, 1114 series
Multi-Channel rotary unions
To handle high speeds and reduce rotating union wear, they require balanced mechanical seals. Deublin’s standard series of multi-channel rotating unions can handle a wide range of application requirements, including workholding where 1 to 8 channels are required. The following series are available from PACH Systems:
- Series 2620, Series 2630-2650, Series 2606-2608, Series 1379-1479
In addition, you can obtain the following rotary unions from Deublin at PACH-Systems:
Unclamping Units
The respective clamping systems are clamped via 
spring force. For this reason, an external force is required to release the clamping systems, which brings about the release of the tool. In total, the release units are available in three different actuation variants:
- Hydraulic
- Pneumatic
- Electric
The required actuation force depends on the size and technical specifications of the respective clamping system. In order to find an optimum compromise between size and the required release pressure for all clamping systems, the release units are available in different sizes.
Unclamping Units
The respective clamping system are clamped via spring force. For this reason, an external force is required to release the clamping systems, which brings about the release of the tool.
In total, the unclamping units are available in three different actuation variants:
- Hydraulic
- Pneumatic
- Electric
The required actuation force depends on the size and technical specifications of the respective clamping system. In order to find an optimum compromise between size and the required release pressure for all clamping systems, the release units are available in different sizes.
Manufacturer article number: 9510136022
Manufacturer article number: 9510169032V03
Manufacturer article number: 9510169032
Drawbars
Drawbar ES
In the case of the drawbar (ES), the gear is located in a cylinder behind the spindle shaft. 
The position of the gearbox enables simple and uncomplicated position sensing of the clamping system. The ES design is possible for applications with spindle speeds up to 10,000 min-1..
Drawbar IS
To ensure that the steep taper clamping systems also function perfectly at higher speeds, the design of the Integrated Installation Clamp (IS) was made as compact as possible by the gear unit integrated into the spindle shaft. Due to this, rotation speeds far above 10,000 min-1 can also be realized.
Drawbars
Drawbar ES
In the case of the drawbar (ES), the gear is located in a cylinder behind the spindle shaft. The position of the gearbox enables simple and uncomplicated position sensing of the clamping system. The ES design is possible for applications with spindle speeds up to 10,000 min-1..
Drawbar IS
To ensure that the steep taper clamping systems also function perfectly at higher speeds, the design of the Integrated Installation Clamp (IS) was made as compact as possible by the gear unit integrated into the spindle shaft. Due to this, rotation speeds far above 10,000 min-1 can also be realized.
PACH Systems offers you a wide product range in the area of automatic tool clamping. For this purpose we cooperate with our long-term partners. Please let us know your requirements via our contact form. We will be pleased to submit you a non-binding offer or contact you to discuss the details.
