H718-2RZ C/P4

Features of H718-2RZ C/P4

Using high-purity bearing steel produced in Europe, with special heat treatment, cold treatment and material modification technology, the fatigue life of this series of bearings is greatly improved.

Applications

This type of bearing has a wide range of applications; it is mainly used for high-speed, high-precision rotation and other working conditions.

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Parameter

Bearing code

Model	Dimensions			15°		25°		Cage material
	Dimensions			Speed limit		Speed limit
	Inside diameter	Outer diameter	Height	Rated load	Grease Oil	Rated load	Grease Oil
	Inside diameter	Outer diameter	Height	Cr Cor	Grease Oil	Cr Cor	Grease Oil
H71800C/P4-2RZ	10	19	5	1.8 1.1	74000 119000	1.7 1.1	69000 109000	Bakelite
H71801C/P4-2RZ	12	21	5	2.0 1.4	69000 109000	1.9 1.3	62000 94000
H71802C/P4-2RZ	15	24	5	2.2 1.8	59000 89000	2.1 1.2	53000 79000
H71803C/P4-2RZ	17	25	5	2.3 1.9	52000 79000	2.1 1.8	49000 74000
H71804C/P4-2RZ	20	32	7	3.9 3.4	44000 66000	3.7 3.2	39000 59000
H71805C/P4-2RZ	25	37	7	4.2 4.1	37000 55000	3.9 3.9	33000 49000
H71806C/P4-2RZ	30	42	7	4.4 4.8	31000 47000	4.1 4.5	27000 42000
H71807C/P4-2RZ	35	47	7	4.6 5.5	25000 39000	4.3 5.2	23000 37000
H71808C/P4-2RZ	40	52	7	4.8 6.2	23000 37000	4.5 5.8	19000 33000
H71809C/P4-2RZ	45	58	7	4.9 6.7	19000 33000	4.6 6.3	17000 29000
H71810C/P4-2RZ	50	65	7	7.4 10.0	17000 29000	6.9 9.5	15000 25000
H71811C/P4-2RZ	55	72	9	10.2 13.8	15000 25000	9.6 13.1	14000 23000
H71812C/P4-2RZ	60	78	10	13.4 18.0	14000 23000	12.6 17.0	13000 21000
H71813C/P4-2RZ	65	85	10	13.4 18.8	13000 21000	12.6 17.8	12000 19000
H71814C/P4-2RZ	70	90	10	13.8 20.3	12000 19000	13.0 19.1	11000 18000
H71815C/P4-2RZ	75	95	10	14.2 21.7	11000 18000	13.3 20.5	10000 17000
H71816C/P4-2RZ	80	100	10	14.5 23.1	10000 17000	13.6 21.8	8500 15000
H71817C/P4-2RZ	85	110	13	21.5 32.2	9000 16000	20.2 30.5	8000 14000
H71818C/P4-2RZ	90	115	13	21.7 33.5	8500 15000	20.4 31.6	7500 13000
H71819C/P4-2RZ	95	120	13	21.9 34.7	8000 14000	20.6 32.8	7500 13000
H71820C/P4-2RZ	100	125	13	22.5 37.0	7500 13000	21.2 34.9	7000 12000
H71821C/P4-2RZ	105	130	13	22.7 38.3	7500 13000	21.3 36.1	7000 12000
H71822C/P4-2RZ	110	140	16	31.8 51.6	7000 12000	29.9 48.7	6500 11000
H71824C/P4-2RZ	120	150	16	33.1 56.9	6000 10000	31.3 53.7	5700 9000
H71826C/P4-2RZ	130	165	18	38.7 67.6	5700 9000	36.3 63.8	5000 8000
H71828C/P4-2RZ	140	175	18	44.8 79.2	5000 8000	42.0 74.7	4600 7500
H71830C/P4-2RZ	150	190	20	51.2 92.0	4600 7500	48.0 86.8	4000 6500
H71832C/P4-2RZ	160	200	20	52.4 97.7	4000 6500	49.2 92.2	3800 6000
H71834C/P4-2RZ	170	215	22	66.5 123.4	3800 6000	62.4 116.5	3300 5300
H71836C/P4-2RZ	180	225	22	159.7 249.1	3500 5700	150.6 235.9	3000 5000
H71838C/P4-2RZ	190	240	24	159.7 249.2	3501 5700	150.6 235.10	3001 5000
H71840C/P4-2RZ	200	250	24	159.7 249.3	3502 5700	150.6 235.11	3002 5000
H71844C/P4-2RZ	220	270	24	159.7 249.4	3503 5700	150.6 235.12	3003 5000
H71848C/P4-2RZ	240	300	28	159.7 249.5	3504 5700	150.6 235.13	3004 5000
H71852C/P4-2RZ	260	320	28	159.7 249.6	3505 5700	150.6 235.14	3005 5000
H71856C/P4-2RZ	280	350	33	159.7 249.7	3506 5700	150.6 235.15	3006 5000
H71860C/P4-2RZ	300	380	38	159.7 249.8	3507 5700	150.6 235.16	3007 5000	Copper
H71864C/P4-2RZ	320	400	38	159.7 249.9	3508 5700	150.6 235.17	3008 5000
H71868C/P4-2RZ	340	420	38	159.7 249.10	3509 5700	150.6 235.18	3009 5000
H71872C/P4-2RZ	360	440	38	159.7 249.11	3510 5700	150.6 235.19	3010 5000
H71876C/P4-2RZ	380	480	46	159.7 249.12	3511 5700	150.6 235.20	3011 5000
H71880C/P4-2RZ	400	500	46	159.7 249.13	3512 5700	150.6 235.21	3012 5000
H71884C/P4-2RZ	420	520	46	159.7 249.14	3513 5700	150.6 235.22	3013 5000
H71888C/P4-2RZ	440	540	46	159.7 249.15	3514 5700	150.6 235.23	3014 5000
H71892C/P4-2RZ	460	580	56	159.7 249.16	3515 5700	150.6 235.24	3015 5000
H71896C/P4-2RZ	480	600	56	159.7 249.17	3516 5700	150.6 235.25	3016 5000
H718/500C/P4-2RZ	500	620	56	159.7 249.18	3517 5700	150.6 235.26	3017 5000

Model	Dimensions			15°		25°		Cage Material
	Inner Diameter	Outer Diameter	Height	Limit Speed		Limit Speed
	Inner Diameter	Outer Diameter	Height	Cr Cor	Grease Oil	Cr Cor	Grease Oil
71836C	180	225	22	159.7 249.1	3500 5700	150.6 235.9	3000 5000	Bakelite
71838C	190	240	24	159.7 249.2	3501 5700	150.6 235.10	3001 5000	Bakelite
71840C	200	250	24	159.7 249.3	3502 5700	150.6 235.11	3002 5000	Bakelite
71844C	220	270	24	159.7 249.4	3503 5700	150.6 235.12	3003 5000	Bakelite
71848C	240	300	28	159.7 249.5	3504 5700	150.6 235.13	3004 5000	Bakelite
71852C	260	320	28	159.7 249.6	3505 5700	150.6 235.14	3005 5000	Bakelite
71856C	280	350	33	159.7 249.7	3506 5700	150.6 235.15	3006 5000	Bakelite
71860C	300	380	38	159.7 249.8	3507 5700	150.6 235.16	3007 5000	Copper
71864C	320	400	38	159.7 249.9	3508 5700	150.6 235.17	3008 5000	Copper
71868C	340	420	38	159.7 249.10	3509 5700	150.6 235.18	3009 5000	Copper

Introduction

Introduction of H718-2RZ C/P4

In the use of common CNC computer engraving machines, the spindle motor as an important part is also prone to failure. One of the common problems is the bearing of the spindle motor. Due to the long-term high-speed operation of the spindle motor, a little carelessness will cause damage to the bearing of the spindle motor.
The reasons for the bearing problems of the spindle motor are as follows:
That is, the heat dissipation of the water-cooled spindle or the air-cooled electric spindle is not timely, and the residual heat causes damage to the bearing.
The second is that the dynamic balance of the electric spindle is not good, which causes uneven force on the bearing during high-speed operation, causing bearing wear.
The third is the excessive force applied to the bearing during the use of the engraving machine spindle.
As a sales of engraving machine bearings, we do not recommend customers to replace or engraving machine spindle motor bearings by themselves. The engraving machine spindle motor looks simple in principle, but it is a precision part. Even if the bearing and other parts are simply replaced, the spindle cannot be calibrated. The dynamic balance of the motor. The repaired spindle will not last long, so it is recommended to find a regular manufacturer for repair.

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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