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Linear Bearing

Linear bearings are a type of linear motion system used in conjunction with cylindrical shafts for linear travel. Since the load-bearing ball is in point contact with the bearing outer casing, the steel ball rolls with minimal friction resistance. Therefore, linear bearings have low friction and are relatively stable. They do not change with the bearing speed, and can achieve smooth linear motion with high sensitivity and precision. Linear bearing consumption also has its limitations. The most important one is that the bearing has poor impact load capacity and poor load-bearing capacity. Secondly, linear bearings vibrate and make more noise when moving at high speeds. The automatic selection of linear bearings is included. Linear bearings are widely used in sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery.

Design and variation

Product details

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Model number	Basic size			Basic load rating		Rated speed
				Dynamic state	Static	Reference speed	Limiting speed
	d [mm]	D [mm]	B [mm]	C [kN]	C₀ [kN]	[r/min]	[r/min]
LMK60UU	60	90	110
LMK50UU	50	80	100
LMK40UU	40	60	80
LMK35UU	35	52	70
LMK30UU	30	45	64
LMK25UU	25	40	59
LMK20UU	20	32	42
LMK16UU	16	28	37
LMF13UU	13	23	32
LMK12UU	12	21	30
LMK10UU	10	19	29
LMK8UU	8	15	17

Model number	Basic size			Basic load rating		Rated speed
				Dynamic state	Static	Reference speed	Limiting speed
	d [in]	D [in]	B [in]	C [Ibf]	C₀ [Ibf]	[r/min]	[r/min]
LMK60UU
LMK50UU
LMK40UU
LMK35UU
LMK30UU
LMK25UU
LMK20UU
LMK16UU
LMF13UU
LMK12UU
LMK10UU
LMK8UU

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Product type, design and form

Open-type linear bearings

shaped like a straight cylinder, with axial slits on the surface, used in situations where clearance adjustment is required, divided into two types: large opening and small opening

Flange-type linear bearings

With mounting flanges at the end or in the middle, which can be installed with screws, flanges are generally divided into three types: round, square and trimmed.

Straight-cylinder linear bearings

shaped like a cylinder, usually installed with a retaining ring, used in installations with smaller dimensions

Advantage

1. High precision and high sensitivity: Linear bearings adopt point contact design, which enables the steel balls to rotate with minimal friction resistance, thus achieving high-precision and smooth movement. This design not only improves the sensitivity of movement, but also maintains high precision at high speeds. ‌

‌2. Low friction and stability: Linear bearings have low friction resistance, good stability, and do not change with bearing speed. They can provide linear motion with high sensitivity and high precision. ‌

‌3. Easy maintenance and low cost: Linear bearings are easy to assemble and disassemble, simple to maintain, do not require frequent lubrication, and have low cost. ‌

‌4. Compact structure and light weight: Linear bearings have a compact structure, light weight, and small axial size, which are suitable for application scenarios that need to save space and weight. ‌

5. Good wear resistance: Linear bearings are made of high-strength and wear-resistant alloy materials, can withstand large workloads and wear, and have a long service life. ‌

‌6. Applicable to a variety of working conditions: Linear bearings are not only suitable for conventional working conditions, but also can be used under special working conditions such as high temperature and high load, such as continuous casting machines, rolling mills and steel pipe rolling equipment. ‌

Application

Linear bearings are suitable for a variety of industrial fields, such as machine tools, metallurgical machinery, construction machinery, aviation, automobiles, light industry, etc. ‌ Especially performs well in high-speed machining centers, drilling and milling centers, lathes, grinders and other equipment.