The use of SCHNEEBERGER linear guideways and recirculating units makes it possible to build cost-effective linear guideway systems.
✔ Improved running smoothness due to damping elements (Type SKD)
✔ Unlimited stroke length for vacuum applications (Type SKC)
✔ High precision and long-lasting design
✔ Space-saving constructions with evenly distributed load capacity
✔ Suitable for dry-running and minimal lubrication applications
✔ Compatibility with SCHNEEBERGER linear guides Type R and RD
The recirculating unit Type SK is equipped with balls and is suitable for low to medium loads. When combined with SCHNEEBERGER linear guides of Type R and/or RD, space-saving designs with evenly distributed load capacities in all directions can be realized. This ball recirculating unit stands out due to its high precision and durability.
The circulating unit type SKC was developed for minimal lubrication, vacuum and cleanroom applications. Together with SCHNEEBERGER linear guideways type R or RD, this ball circulating unit enables unlimited travel. Thanks to the special material combination of coated steel, ceramic and Teflon® balls, the unit is particularly suitable for dry running.
The ball circulating unit type SKD is equipped with damping elements that ensure improved smooth running. This ball circulating unit is suitable for low to medium loads and is used in combination with SCHNEEBERGER linear guideways type R or RD. The additional damping elements reduce noise and optimize smooth running without significantly affecting load capacity.
All three types - SK, SKC and SKD - are based on the ball circulation unit principle and are designed for use with SCHNEEBERGER linear guides of type R or RD. However, they differ significantly in their design and suitability for specific areas of application.
The SK is the classic standard version and is suitable for small to medium loads. Its compact design allows for space-saving constructions that can withstand loads in all directions. The SK stands for high precision, reliability and long service life.
The SKC was specially developed for applications where conventional lubrication is not possible or desirable. This includes cleanrooms, vacuum systems or environments with special hygiene requirements. Thanks to a material combination of coated steel, ceramic and Teflon balls, the SKC is suitable for dry running and minimal lubrication, offering a very long service life even without lubricants.
The SKD type is equipped with integrated damping elements that provide noticeably improved smooth running. The load capacity remains unchanged, but noise emissions are significantly reduced. This variant is particularly suitable for applications where smooth operation and low vibration are important.
The SKC is designed for use in sensitive environments where traditional lubrication must or should be avoided. These include cleanrooms, vacuum systems and areas with special hygiene requirements such as medical technology, semiconductor manufacturing or the food industry.
Thanks to the use of Teflon balls and a combination of coated steel and ceramic components, the SKC is ideal for dry running. This means it remains functional even without external lubricants while maintaining high guiding accuracy. Its specific design makes it particularly resistant to wear and corrosion.
Another advantage of the SKC is the possibility of unlimited stroke. Combined with SCHNEEBERGER linear guides of type R or RD, the circulation unit can be used continuously over long distances without compromising its function or accuracy. This makes it a particularly flexible solution for linear technology applications in demanding environments.
The SKC also helps reduce maintenance requirements, as no relubrication is necessary. At the same time, the risk of contamination from lubricants is completely avoided.
The SKD circulation unit differs from the standard SK version mainly due to its integrated damping elements. These components were developed to improve the smoothness of the ball circulation unit and to reduce noise during operation.
The damping elements act directly in the ball circulation mechanism. They absorb part of the occurring vibrations, thus enabling smoother movement without significantly impairing the basic function or load-bearing capacity of the unit. This makes the SKD particularly suitable for applications where low noise levels or low-vibration operation are important.
Typical fields of application include precision machinery, laboratory environments or sensitive production areas where machine components should operate as quietly and smoothly as possible. The quiet operation is also important in manufacturing processes with high demands on repeatability and process stability.
Despite the additional damping, the mechanical load capacity remains at a high level, making the SKD a robust and durable solution for demanding industrial applications. At the same time, wear is reduced, leading to a longer service life and lower maintenance costs.
The term “unlimited stroke” refers to the ability of SCHNEEBERGER's ball circulation units to move over any length without compromising their function. This is made possible by combining them with type R or RD linear guides, which allow continuous guiding over several meters.
The SK, SKC and SKD circulation units are designed to move continuously along the guideway. The balls circulate in a closed loop inside the housing, enabling uniform and precise motion across the entire length of the rail.
Unlimited stroke means that the mechanical travel distance is not limited by the design of the circulation unit. This is especially beneficial in machines with long axes, such as those used in automation, machine tools or transport and positioning systems.
This characteristic makes SCHNEEBERGER's circulation units a highly flexible and powerful component in the field of linear technology. Depending on the application, they can be individually adapted and installed in any number on the guideway.
The SK, SKC and SKD circulation units are fully compatible with SCHNEEBERGER's linear guides of type R and RD. These guides form the basis for highly precise linear motion and are available in various sizes and lengths.
Type R is the classic version of a flat guideway with a hardened surface and high geometric accuracy. It offers uniform load capacity in all directions and features a compact, space-saving design. This guide is ideal for applications with high demands on precision, repeatability and load capacity.
Type RD is based on the same profile as type R but additionally features a sealing strip. This prevents the ingress of dirt, dust or liquids into the guide zone, thus increasing the system's service life and reliability - especially in industrial environments with high loads.
All three circulation unit types can be combined with both guide types. The SK offers a standard solution for a wide range of applications, the SKC is suitable for special environments such as cleanrooms or dry operation, and the SKD offers additional comfort through reduced vibrations. This allows a technically and economically optimal solution to be configured for each application.
All three types - SK, SKC and SKD - are based on the ball circulation unit principle and are designed for use with SCHNEEBERGER linear guides of type R or RD. However, they differ significantly in their design and suitability for specific areas of application.
The SK is the classic standard version and is suitable for small to medium loads. Its compact design allows for space-saving constructions that can withstand loads in all directions. The SK stands for high precision, reliability and long service life.
The SKC was specially developed for applications where conventional lubrication is not possible or desirable. This includes cleanrooms, vacuum systems or environments with special hygiene requirements. Thanks to a material combination of coated steel, ceramic and Teflon balls, the SKC is suitable for dry running and minimal lubrication, offering a very long service life even without lubricants.
The SKD type is equipped with integrated damping elements that provide noticeably improved smooth running. The load capacity remains unchanged, but noise emissions are significantly reduced. This variant is particularly suitable for applications where smooth operation and low vibration are important.
The SKC is designed for use in sensitive environments where traditional lubrication must or should be avoided. These include cleanrooms, vacuum systems and areas with special hygiene requirements such as medical technology, semiconductor manufacturing or the food industry.
Thanks to the use of Teflon balls and a combination of coated steel and ceramic components, the SKC is ideal for dry running. This means it remains functional even without external lubricants while maintaining high guiding accuracy. Its specific design makes it particularly resistant to wear and corrosion.
Another advantage of the SKC is the possibility of unlimited stroke. Combined with SCHNEEBERGER linear guides of type R or RD, the circulation unit can be used continuously over long distances without compromising its function or accuracy. This makes it a particularly flexible solution for linear technology applications in demanding environments.
The SKC also helps reduce maintenance requirements, as no relubrication is necessary. At the same time, the risk of contamination from lubricants is completely avoided.
The SKD circulation unit differs from the standard SK version mainly due to its integrated damping elements. These components were developed to improve the smoothness of the ball circulation unit and to reduce noise during operation.
The damping elements act directly in the ball circulation mechanism. They absorb part of the occurring vibrations, thus enabling smoother movement without significantly impairing the basic function or load-bearing capacity of the unit. This makes the SKD particularly suitable for applications where low noise levels or low-vibration operation are important.
Typical fields of application include precision machinery, laboratory environments or sensitive production areas where machine components should operate as quietly and smoothly as possible. The quiet operation is also important in manufacturing processes with high demands on repeatability and process stability.
Despite the additional damping, the mechanical load capacity remains at a high level, making the SKD a robust and durable solution for demanding industrial applications. At the same time, wear is reduced, leading to a longer service life and lower maintenance costs.
The term “unlimited stroke” refers to the ability of SCHNEEBERGER's ball circulation units to move over any length without compromising their function. This is made possible by combining them with type R or RD linear guides, which allow continuous guiding over several meters.
The SK, SKC and SKD circulation units are designed to move continuously along the guideway. The balls circulate in a closed loop inside the housing, enabling uniform and precise motion across the entire length of the rail.
Unlimited stroke means that the mechanical travel distance is not limited by the design of the circulation unit. This is especially beneficial in machines with long axes, such as those used in automation, machine tools or transport and positioning systems.
This characteristic makes SCHNEEBERGER's circulation units a highly flexible and powerful component in the field of linear technology. Depending on the application, they can be individually adapted and installed in any number on the guideway.
The SK, SKC and SKD circulation units are fully compatible with SCHNEEBERGER's linear guides of type R and RD. These guides form the basis for highly precise linear motion and are available in various sizes and lengths.
Type R is the classic version of a flat guideway with a hardened surface and high geometric accuracy. It offers uniform load capacity in all directions and features a compact, space-saving design. This guide is ideal for applications with high demands on precision, repeatability and load capacity.
Type RD is based on the same profile as type R but additionally features a sealing strip. This prevents the ingress of dirt, dust or liquids into the guide zone, thus increasing the system's service life and reliability - especially in industrial environments with high loads.
All three circulation unit types can be combined with both guide types. The SK offers a standard solution for a wide range of applications, the SKC is suitable for special environments such as cleanrooms or dry operation, and the SKD offers additional comfort through reduced vibrations. This allows a technically and economically optimal solution to be configured for each application.
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