HC719-EDLR-P4S Series

Features of HC719-EDLR-P4S Series

We produce and sell HC719-EDLR-P4S series high-speed spindle bearings, which have been adjusted, matched or grouped, with a contact angle of α = 25°, with ceramic balls, restricted tolerances, for direct oil feed through the outer ring, with embedded O type lock up.

Applications

The scope of application is wide. Our products survive by quality, develop by reputation, and win the market by service.

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Parameter Introduction Quality Standard

Parameter

Model	d	D	B
Model	mm	mm	mm
HC71903-EDLR-T-P4S	17	30	7
HC71904-EDLR-T-P4S	20	37	9
HC71905-EDLR-T-P4S	25	42	9
HC71906-EDLR-T-P4S	30	47	9
HC71907-EDLR-T-P4S	35	55	10
HC71908-EDLR-T-P4S	40	62	12
HC71909-EDLR-T-P4S	45	68	12
HC71910-EDLR-T-P4S	50	72	12
HC71911-EDLR-T-P4S	55	80	13
HC71912-EDLR-T-P4S	60	85	13
HC71913-EDLR-T-P4S	65	90	13
HC71914-EDLR-T-P4S	70	100	16
HC71915-EDLR-T-P4S	75	105	16
HC71916-EDLR-T-P4S	80	110	16
HC71917-EDLR-T-P4S	85	120	18
HC71918-EDLR-T-P4S	90	125	18
HC71919-EDLR-T-P4S	95	130	18
HC71920-EDLR-T-P4S	100	140	20
HC71921-EDLR-T-P4S	105	145	20
HC71922-EDLR-T-P4S	110	150	20
HC71924-EDLR-T-P4S	120	165	22
HC71926-EDLR-T-P4S	130	180	24
HC71928-EDLR-T-P4S	140	190	24
HC71930-EDLR-T-P4S	150	210	28
HC71932-EDLR-T-P4S	160	220	28
HC71934-EDLR-T-P4S	170	230	28
HC71936-EDLR-T-P4S	180	250	33
HC71938-EDLR-T-P4S	190	260	33
HC71940-EDLR-T-P4S	200	280	38
HC71944-EDLR-T-P4S	220	300	38
HC71948-EDLR-T-P4S	240	320	38

Quality Standard

Rockewell Bearings has added parameters that are not defined by ISO/ABEC for customers, including preload tolerances, functional tests, traceability and micron codes, cleanliness, raceway curvature, balls, etc. and roundness, surface processing (function And non-functional surfaces), steel specifications, cage trim and design, and installation chamfering. The definition of these parameters improves the quality of precision angular contact ball bearing products, thereby improving the performance of machine tool spindles.
The element of precision angular contact ball bearings is the cage, which is very important for machine tool bearings. The performance of the cage will affect the stability of machine tool bearings under high-speed rotation. The standard cage produced by Rockewell is made of phenolic resin. The internal design and the tolerance of the pocket gap are tight and the guide surface is controlled to ensure the stability of the cage during high-speed operation, lubrication and dynamic load.
The two elements of precision angular contact ball bearings are cleanliness, which is very important for precision angular contact ball bearings. Generally, the parts of the bearing products must be cleaned with a multi-solvent for 3 hours to prevent impurities from entering the bearing and prevent inherent pollution sources. In addition, the non-working surface of the bearing must be ground to ensure that the bearing is free of impurities before leaving the factory. Therefore, the bearing products produced by Rockewell can increase the normal operating time of the machine tool.
There are two main structural design methods for precision angular contact ball bearings: the high-rigidity WI series and the high-speed HX series to meet the requirements of different applications. The basic, open Rockewell bearing design has a higher spindle speed and greater dynamic radial stiffness, so the spindle can cut more material in a shorter time while ensuring excellent finished product tolerances. These improvements are attributed to the combination of the ball body and the precision engineering design of the raceway profile, which improves the processing rate.

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