Yrt325 P4 Rotary Table Bearing for CNC Machine

Product Description

 

Name	Roatry Table Bearing
Seires	YRT/YRTS/YRTC/YRTM/ZKLDF Series
Brand	MONTON
Model	YRT325
d	325mm
D	450mm
H	60mm
H1	40mm
C	20mm
D1	415mm
J1	430mm
Ring Material	Gcr15/ Carbon Steel
Cage Material	Brass cage/Nylon cage
dynamic load  Ca	275kN
static load Coa	1930kN
dynamic load  Cr	120KN
static load Cor	345KN
Limiting speed	170 r/min
Sealed	No seals
Weight	25KG
Bearing Arrangement	Radial/Axial direction
Design Structure	Cylindrical roller
Precision	P4/P2
Quality standard	ISO9001: 2000/SGS
Package	single Wooden case
Original	Luoyang
Service	OEM
Delivery date	Accord to order qty, usually 5-35 days
Application	High precision CNC turntables, indexing heads, mili tary radars, aviation, aerospace, and areas requiring high precision in measurement and testing.

Axial/radial bearings

Axial/radial bearings are double direction axial bearings for screw mounting, with a radial guidance bearing. These ready-to-fit,greased units are very rigid, have high load carrying capacity and run with particularly high accuracy. They can support radial forces, axial forces from both directions and tilting moments free from clearance. The bearings are available in several series. For applications with low speeds and small operating durations, such as indexing tables and swivel type milling heads, the most suitable bearings are generally series YRT and YRTC.

For the bearing arrangements of direct drive axes, there is the series YRTS. Due to their high limiting speeds and very low, uniform frictional torque across the whole speed range, these bearings are particularly suitable for combination with torque motors. For higher accuracy requirements, these bearings are also available with restricted axial and radial runout accuracy.

YRT bearing table

bearing type	Dimensions								Basic load rating				Limiting speed	Bearing frictional torque	weight
									axial		radial
	d	D	H	H1	C	D1	J	J1	dynamic load	static load	dynamic load	static load
	unit: mm								Ca	Coa	Cr	Cor	grease
									KN				r/min	Nm	Kg
YRT80	80	146	35	23.35	12	130	92	138	56	255	42.5	100	530	3	2.4
YRT100	100	185	38	25	12	160	112	170	76.5	415	47.5	120	430	3	4.1
YRT120	120	210	40	26	12	184	135	195	102	540	52	143	340	7	5.3
YRT150	150	240	40	26	12	214	165	225	112	630	56	170	320	10	6.2
YRT180	180	280	43	29	15	244	194	260	118	710	69.5	200	280	12	7.7
YRT200	200	300	45	30	15	274	215	285	120	765	81.5	220	260	14	9.7
YRT260	260	385	55	36.5	18	345	280	365	160	1060	93	290	200	20	18.3
YRT325	325	450	60	40	20	415	342	430	275	1930	120	345	170	40	25
YRT395	395	525	65	42.5	20	486	415	505	300	2280	186	655	140	55	33
YRT460	460	600	70	46	22	560	482	580	355	2800	200	765	120	70	45
YRT580	580	750	90	60	30	700	610	720	490	4250	228	965	80	140	89
YRT650	650	870	122	78	34	800	680	830	1040	8000	490	1800	65	200	170
YRT850	850	1095	124	80.5	37	1018	890	1055	1000	8650	455	1730	50	300	253
YRT950	950	1200	132	86	40	1130	990	1160	1290	11400	530	2040	40	600	312
YRT1030	1030	1300	145	92.5	40	1215	1075	1255	1380	12000	620	2650	35	800	375
YRT1200	1200	1490	164	108	56	1410	1240	1445	1435	12850	745	2800	25	1000	450

Axial angular contact ball bearings

Axial angular contact ball bearings ZKLDF are low-friction, ready-to-fit, pregreased bearing units with high accuracy for very high speeds, high axial and radial loads and high demands on

tilting rigidity.Axial angular contact ball bearings are particularly suitablefor precision applications involving combined loads. Their preferred areas of use are bearing arrangements in rotary tables with a main

spindle function, for example in combined milling and turning, as well as in milling, grinding and honing heads and in measurement and testing equipment.

Axial/radial bearings with angular measuring system

Axial/radial bearings with angular measuring system YRTM and YRTSM correspond in mechanical terms to series YRT and YRTS, but are additionally fitted with an angular measuring system. The measuring system can measure angles to an accuracy of a few angular seconds by non-contact, magneto-resistive means.

Further information on axial/radial bearings with absolute value angular measuring systems YRTMA and YRTSMA can be found in special publication SSD 30.
 

Features 

Axial radial bearings YRT, YRTC and YRTS and axial angular contact ball bearings ZKLDF are ready-to-fit high precision bearings for high precision applications with combined loads. They can support radial loads, axial loads from both sides and tilting moments without clearance and are particularly suitable for bearing arrangements with high requirements for running accuracy.

Due to the fixing holes in the bearing rings, the units are very easy to fit.

The bearings are radially and axially preloaded after fitting.

The mounting dimensions of all series are identical.

Axial/radial bearings YRT in the size range of d = 580 mm to d = 1 030 mm have been replaced by YRTC.

Compared with the predecessor product YRT, these bearings have higher rigidity, a higher limiting speed and lower bearing friction.

With angular measuring system 

Axial/radial bearings are also available with an absolute value angular measuring system or have systems with pitch-coded reference marks. The measuring systems can measure angles to an accuracy of a few angular seconds by non-contact means.

Areas of application For standard applications with low speeds and small operatingdurations, such as indexing tables and swivel type milling heads, the most suitable bearings are generally series YRT and YRTC.

For the bearing arrangements of direct drive axes, there is the series YRTS. Due to their high limiting speeds and very low, uniform frictional torque across the whole speed range, these bearings are

particularly suitable for combination with torque motors.

For higher accuracy requirements, these bearings are also available with restricted axial and radial runout accuracy.

Axial angular contact ball bearings ZKLDF are particularly suitable for high speed applications with long operating duration.

They are characterised by high tilting rigidity, low friction and low lubricant consumption.
 

Installation Instructions

 

1. Bearing installation diagram

1.1 Design & Installation Structure with the requirements shown in Figure 1 Retaining screws secure the bearing components during transport. For installing the bearing easier, the screws should be loosened before fitting, and secured again or replaced by positioning screws after fitting.

1.2 The L-section ring can be fitted with unsupported or supported ring.

a) Without supported ring, the bearing type is YRT.

b) With supported ring, the bearing type is YRT…VSP,And the whole surface of L-section should be supported.

1.3 Mounting forces must only be applied to the bearing ring to be fitted, never through the rolling elements.Tighten the fixing screws in crosswise using a torque wrench (shown in figure 2).

1.4 Don't separate or interchanged bearing components during fitting and dismantling.

1.5 Starting friction torque can be 3 to 3.5 times as high as the value of friction torque in the dimension tables.

 

2. Bearing Lubrication Maintenance

YRT Rotary Table bearing use German high quality grease for lubrication, standard oil filling

holes are made on the bearing, lubrication maintenance points are as follows:

2.1 Grease:LUBCON Turmogrease Li 802 EP (Made in German)

2.2 Grease maintenance cycletime: 3-5 months;

2.3 Check the situation of bearing grease regularly, ensure an clean environment to prevent

contaminants from entering the bearing;

2.4 Fill the grease by oil guns or other tools through the oil holes location as shown below:

Machining tolerances for shafts    

 

Bearings	shaft diameter (mm)			roundness(○)	perpendicularity(⊥)	parallelism(∥)	roughness Ra
	Nominal dimension	upper	lower	t1(µm)	t3(µm)	t4(µm)	Ra(µm)
YRT50	50	0	-0.011	4	3	3	0.4
YRT80	80	0	-0.013	5	3	3	0.4
YRT100	100	0	-0.015	6	4	4	0.4
YRT120	120	0	-0.015	6	4	4	0.4
YRT150	150	0	-0.018	8	5	5	0.8
YRT180	180	0	-0.018	8	5	5	0.8
YRT200	200	0	-0.02	10	7	7	0.8
YRT260	260	0	-0.023	12	8	8	0.8
YRT325	325	0	-0.025	13	9	9	0.8
YRT395	395	0	-0.025	13	9	9	0.8
YRT460	460	0	-0.027	15	10	10	0.8
YRT580	580	0	-0.028	16	11	11	1.6
YRT650	650	0	-0.032	18	12	12	1.6
YRT850	850	0	-0.036	20	14	14	1.6
YRT950	950	0	-0.036	20	14	14	1.6
YRT1030	1030	0	-0.045	25	16	16	1.6
YRT1200	1200	0	-0.054	18	18	18	1.6

Machining tolerances for housings

Bearings	(mm)housing diameter			roundness(○)	perpendicularity(⊥)	parallelism(∥)	roughness Ra
	Nominal dimension	upper	lower	t1(µm)	t3(µm)	t4(µm)	Ra(µm)
YRT50	126	+0.018	-0.007	8	5	5	0.8
YRT80	146	+0.018	-0.007	8	5	5	0.8
YRT100	185	+0.022	-0.007	10	7	7	0.8
YRT120	210	+0.022	-0.007	10	7	7	0.8
YRT150	240	+0.022	-0.007	10	7	7	0.8
YRT180	280	+0.025	-0.007	12	8	8	0.8
YRT200	300	+0.025	-0.007	12	8	8	0.8
YRT260	385	+0.029	-0.007	13	9	9	0.8
YRT325	450	+0.033	-0.007	15	10	10	0.8
YRT395	525	+0.034	-0.01	16	11	11	1.6
YRT460	600	+0.034	-0.01	16	11	11	1.6
YRT580	750	+0.038	-0.012	18	12	12	1.6
YRT650	870	+0.044	-0.012	20	14	14	1.6
YRT850	1095	+0.052	-0.014	24	16	16	1.6
YRT950	1200	+0.052	-0.014	24	16	16	1.6
YRT1030	1300	+0.060	-0.016	27	18	18	1.6
YRT1200	1490	+0.068	-0.02	20	20	18	1.6