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THK HSR25LA Linear Guide Bearing Block With Longer Overall LM Block Length

THK HSR25LA Linear Guide Bearing Block With Longer Overall LM Block Length

• THK HSR25LA
• THK Linear Bearing Block
• THK Linear Motion System HSR series
• Linear Motion HSR25LA
• Longer Overall LM Block Length HSR25A
• Linear Guide Standard Ball Profile Rail Series HSR25
• 25 mm Rail ball bearing
• THK HSR25LA Linear Guide Bearing 102.2mm
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THK HSR25LA Linear Guide Bearing Block With Longer Overall LM Block Length

The THK HSR Series of linear motion guides (also known as "LM guides") incorporate linear rolling motion for practical use. In this series, the rows of balls are places at a 45 degree contact angle. The rated loads are uniform as they are applied to the linear motion block in radial, reverse radial and lateral directions. This Linear Motion Guide series can be implemented in all orientations because of this feature. Because this is a full-ball type series, it offered in a wide range of sizes to fit a number of applications, from large scale to small.

Linear Motion HSR25LA.jpg

The THK HSR25 LA is a ball, 4-way equal load type guide block. it has the same cross-sectional shape as model HSR-A, but has a longer overall LM block length (L) and a greater rated load.

25 mm Rail ball bearing.jpg

HSR25LA Linear Guide Block’s feature:

Structure and Features

Balls roll in four rows of raceways precision-ground on an LM rail and an LM block, and end plates incorporated in the LM block allow the balls to circulate.

Each row of balls is placed at a contact angle of 45 degree so that the rated loads applied to the LM block are uniform in the four directions (radial, reverse radial and lateral directions), enabling the LM Guide to be used in all orientations. In addition, the LM block can receive a well-balanced preload, increasing the rigidity in the four directions while maintaining a constant, low friction co efficient. With the low sectional height and the high rigidity design of the LM block, this model achieves highly accurate and stable straight motion.

[4-way Equal Load]

[High Rigidity Type]

Since balls are arranged in four rows in a well-balanced manner, a large preload can be applied and the rigidity in four directions can easily be increased.

[Self-adjustment Capability]

The self-adjustment capability through front-to-front configuration of THK’s unique circular-arc grooves (DF set) enables a mounting error to be absorbed even under a preload, thus to achieve highly accurate, smooth straight motion.

[High Durability]

Even under a preload or excessive biased load, differential slip of balls does not occur. As a result, smooth motion, high wear resistance, and long-term maintenance of accuracy are achieved.

[Stainless Steel Type also Available]

A special type which LM block, LM rail and balls are made of stainless steel is also available.

THK Linear Bearing Block.jpg

Specification of HSR LA series:

Model No.	Outer dimensions			Block dimensions			Rail dimensions		Basic load rating
	Outer dimensions			Block dimensions			Rail dimensions		Radial
	Height	Width	Length	B	C	S	Pitch	d₁xd₂xh	Dynamic	Static
	M	W	L	B	C	S	F	d₁xd₂xh	C	C₀
	mm	mm	mm	mm	mm	mm	mm	mm	kN	kN
HSR20LA	30	63	90	53	40	M6	60	6x9.5x8.5	23.9	35.8
HSR25LA	36	70	102.2	57	45	M8	60	7x11x9	35.2	51.6
HSR30LA	42	90	120.6	72	52	M10	80	9x14x12	48.9	70.2
HSR35LA	48	100	134.8	82	62	M10	80	9x14x12	65	91.7
HSR45LA	60	120	170.8	100	80	M12	105	14x20x17	100	135
HSR55LA	70	140	201.1	116	95	M14	120	16x23x20	148	194
HSR65LA	90	170	245.5	142	110	M16	150	18x26x22	249	323