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Metric X-type Thin Wall Four Point Contact Ball Bearings

Metric X-type Thin Wall Four Point Contact Ball Bearings,integrating crossed contact structure, metric precision manufacturing, and thin-wall enhancement technology, achieve a 35% increase in axial stiffness and 80% higher rotational speed while being 40% lighter, ideal for high-precision, lightweight applications in robotics, aerospace, and other advanced industries.

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	Type	Main dimensions			Rated load		Rated speed
					Dynamics	Static	Speed limit
Mail		d[mm]	D[mm]	B[mm]	C[kN]	C₀[kN]	[r/min]
	LKJG200XPO	508	558	25	383070.0	130240.0	-
	LKJG200XPO 2RS	508	558	25	383070.0	130240.0	-
	LKJG180XPO	457	508	25	346620.0	121840.0	-
	LKJG180XPO 2RS	457	508	25	346620.0	121840.0	-
	LKJG160XPO	406	457	25	310130.0	113130.0	-
	LKJG160XPO 2RS	406	457	25	310130.0	113130.0	-
	LKJG140XPO	355	406	25	273630.0	152950.0	-
	LKJG140XPO 2RS	355	406	25	273630.0	152950.0	-
	LKJU120XPO	304	323	12	66140.0	19650.0	-
	LKJG120XPO	304	355	25	237140.0	94590.0	-
	LKJU120XPO 2RS	304	323	12	66140.0	19650.0	-
	LKJG120XPO 2RS	304	355	25	237140.0	94590.0	-
	LKJU110XPO	279	298	12	60810.0	18580.0	-
	LKJU110XPO 2RS	279	298	12	60810.0	18580.0	-
	LKJU100XPO	254	273	12	55430.0	17470.0	-
	LKJU100XPO 2RS	254	273	12	55430.0	17470.0	-
	LKJUO90XPO	228	247	12	50100.0	16310.0	-
	LKJUO90XPO 2RS	228	247	12	50100.0	16310.0	-
	LKJUO80XPO	203	222	12	44760.0	15160.0	-
	LKJUO80XPO 2RS	203	222	12	44760.0	15160.0	-

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Innovative X-Contact Geometry

Crossed four-point contact design (combined contact angles α=35°/55°) increases axial stiffness by 18% over conventional four-point bearings
Optimized stress distribution ensures maximum contact stress <1,800MPa under radial load P_r=8.5kN

Metric Precision Manufacturing

Full compliance with ISO 492:2018 metric standards (bore d=10-100mm, OD D=26-150mm)
Raceway roundness error ≤1.2μm, rotational accuracy meeting P4 class (GB/T 307.1)

Thin-wall Enhancement Technology

0.8-1.5mm ultra-thin rings (wall thickness/diameter ratio <0.03) treated with vacuum quenching + ion nitriding
Dynamic stiffness K_r=1,200N/μm at rotational speed n=12,000rpm

Application

The bearings can be used in the following industries

Industrial Robotics: SCARA robot wrist joints (repeatability ±0.02mm)
Aerospace: Satellite solar panel drives (15-year service life / 5×10^5 cycles)
Precision Metrology: CMM rotary tables (runout ≤3μm)
Medical: Da Vinci surgical robot arms (10^6 fatigue cycles under alternating loads)