Super-Heavy Load (Four-Way Equal Load) Model SVS for Machine Tools｜LM Guide｜Product Information

Types

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Basic load rating (kN): Basic dynamic load rating 37 to 208 / Basic static load rating 52.2 to 269
Sizes : 25,30,35,45,55,65

Basic load rating (kN): Basic dynamic load rating 43.7 to 260 / Basic static load rating 66.1 to 370
Sizes : 25,30,35,45,55,65

Basic load rating (kN): Basic dynamic load rating 37 to 208 / Basic static load rating 52.2 to 269
Sizes : 25,30,35,45,55,65

Basic load rating (kN): Basic dynamic load rating 43.7 to 260 / Basic static load rating 66.1 to 370
Sizes : 25,30,35,45,55,65

Basic load rating (kN): Basic dynamic load rating 68.6 to 136 / Basic static load rating 88.6 to 180
Sizes : 35,45,55

Basic load rating (kN): Basic dynamic load rating 86.1 to 164 / Basic static load rating 123 to 237
Sizes : 35,45,55

Basic load rating (kN): Basic dynamic load rating 68.6 to 136 / Basic static load rating 88.6 to 180
Sizes : 35,45,55

Basic load rating (kN): Basic dynamic load rating 86.1 to 164 / Basic static load rating 123 to 237
Sizes : 35,45,55

Features

Structure and Features

Models SVR and SVS have higher rigidity and load-bearing capacity than other models in the Caged-Ball LM Guide series. In addition, they maintain the highly reliable performance of the LM Guide through a wide range of enhanced contamination protection options that take into account the service environments of machine tools and other machinery.

Note: Since models SVR and SVS are very rigid, their structures are easily affected by misalignment of the mounting surface and installation error. If affected by these factors, their service life may be shortened or their motion may be disrupted. When considering using these models, contact THK.

Super-Heavy Load and Increased Damping

The raceway of models SVR and SVS adopt a deep circular-arc groove with a curvature approximate to the ball diameter. Since the ball contact area increases as the applied load increases, a large load carrying capacity is achieved and damping is also improved.

Increased Contamination Protection Performance

The protector’s improved ability to remove foreign material strengthens its contamination protection performance. In addition, use of a side scraper reduces the entrance of foreign material into the LM block, thus maintaining the LM Guide performance for a long period even in adverse environments.

High Rigidity

Models SVR and SVS achieve the highest rigidity among the Caged Ball LM Guide series. Both the radial type Model SVR and the four-way equal load type Model SVS are available for the same size. Depending on the intended use, you can select either type.

Wide Array of Options

Various options are available, including an end seal, inner seal, side seal, Laminated Contact Scraper LaCS, protector, side scraper, and Cap GC, to cope with diversified service environments.

Models SVR/SVS Contamination Protection Performance Evaluation

Models SVR/SVS maintain their performance under severe conditions with fine particles or liquid contamination.

Test conditions

Item		Description
Tested model		SVS45LR1TTHHYYC1+2880LP×2set
Maximum speed		200 m/min
Stroke		2,500 mm
Grease used		THK AFB-LF Grease
Environmental conditions	Foreign material	Type: Metal powder (atomized powder) (particle diameter: 125 μm or less)
	Foreign material	Amount: 0.4 g/20 min
	Coolant	Water-soluble coolant
	Coolant	Amount: 0.2 cc/10 s

Models SVR and SVS with accessories (TTHHYY option)

TTHHYY Option:
	Double seals, Laminated Contact Scraper LaCS, protector, side scraper

Test result

Models SVR and SVS maintain their performance even after traveling 3,000 km under severe conditions with exposure to coolant and contamination.

Detailed information for each model number

Dimensional drawing/Dimensional table

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Products	Contents
LM Guide	LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc.
Ball Screw	Axial clearance, maximum manufacturing length of shaft, etc.
Actuator	Movable part mass, etc.

Standard Lengths and Maximum Lengths of LM Rails