Hex Bore Agricultural Bearing - Factory Quality Assurance, CE Certified

• Customization: Available
• Aligning: Non-Aligning Bearing
• Separated: Unseparated
• Model NO.: W208PP8 W209ppb2 W209ppb4 W210ppb2 W210ppb5 205krr
• Feature: Vacuum, Magnetically, Low Temperature, Corrosion Resistant, High Temperature, High Speed
• Rows Number: Single
• Raceway: Deep Groove Raceway
• Material: Chrome Steel
• Bearing Block Model: Round/Square Hole/ Hex Hole/ Disc Harrow Agricultu
• Factory or Trader: Factory
• Quality Guarantee: at Least One Year
• Certification: ISO9001, Ts16949, CE
• Types: Round/Square Hole/ Hex Hole/ Disc Harrow Agricultu
• Recommended Models 1: Gw208ppb5 Gw208ppb6 Gw208ppb8 Gw208PP17 Gw208ppb17
• Recommended Models 2: 204krrb2 205kpp2 205krr2 205kppb2 205krrb2
• Recommended Models 3: 204krr3t 205kr4 206kr7 206krr8 207krr 208krr
• Recommended Models 4: Wir212-39, W214ppb2, Gc211-32-Nlc, SA207 SA208
• Vibration & Noisy: Z1, Z2, Z3; V1, V2, V3
• Size: Both Metric and Imperial Size Are Available.
• OEM Available or Not: Available
• Relative Products: Pillow Block Bearing, Insert Bearing, Ball Bearing
• Application: Farm Equipment Machinery
• Brand: Allfine / ATS / OEM Brand
• Samples: Free Sample
• Transport Package: Plastic Bag+Colorful Individual Box+ Outside Cart
• Specification: depend on the bearing models
• Trademark: ALLFINE or OEM
• Origin: China
• HS Code: 84832000
• Production Capacity: 500000pieces/Month

Product Description

Why choose us?

- Boasting over three decades of unparalleled expertise in the manufacturing and exportation of high-quality bearings.

- Proudly holding ISO9001, TS16949, and SGS certifications, a testament to our unwavering commitment to excellence.

- Rigorous 100% inspection of every product ensures an impressive ZERO defective rate, providing you with peace of mind.

- Comprehensive 1-2 year quality warranty on all our bearings, reinforcing our dedication to customer satisfaction.

- Exceptional 24/7 pre-sales and after-sales support, ensuring your needs are met with the utmost care and attention.

- Vast inventory allows for prompt, on-time deliveries, meeting your demands without delay.

- Unbeatable pricing with special discounts available for large volume orders, delivering value at every step.

Product Description

With an illustrious legacy spanning over three decades, Shandong Allfine Bearings stands as a beacon of excellence in the realm of bearing manufacturing. Boasting 17 state-of-the-art production lines, our expertise in crafting precision bearings is unparalleled.

At Allfine factory, our expansive repertoire includes over 4,000 models of both industrial and agricultural bearings. Proudly stamped with the Allfine brand, each bearing is backed by our unwavering commitment to quality with a minimum one-year warranty.

We specialize in an array of agricultural bearings, meticulously designed to cater to diverse needs, including: Round Bore Series, Square Bore Series, Hex Bore Series, Disc Harrow 200 Series, UEL Series, AEL Series, SA Series, ER Series, SB Series, CSB Series, etc. Additionally, our pillow block bearings (Chumeceras) remain a flagship product, showcasing our innovative edge in bearing solutions.

Detailed Photos

Shandong Allfine Auto Parts Co., Ltd. proudly manufactures a diverse range of agricultural bearings, ensuring each product meets the highest standards of quality and performance.

Our extensive lineup includes: - Round bore with spherical outer diameter, - Square bore with spherical outer diameter, - Round bore with cylindrical outer diameter, - Square bore with cylindrical outer diameter, - Flanged disc units with round bore, - Flanged disc units with square bore. All our bearings are crafted with precision to support your agricultural needs efficiently.

Square Bore agricultural bearings  (GW series)
Item	d (mm)	D (mm)	Be (mm)	Bi  (mm)	NTN
GW208PPB5	29.972	80	21	36.525	1AS08-1 5/32D1
GW208PPB6	26.162	80	21	36.525
GW208PPB8	29.972	80	30.175	36.525	2AS08-1 1/8 D1
GW208PP17	29.972	85.738	30.175	36.525
GW208PPB17	29.972	85.738	30.175	36.525
GW209PPB5	32.776	85	30.175	36.525
GW209PPB8	32.776	85	22	36.525
GW210PP4	29.972	90	30.175	30.175	7AS10-1 1/8 D1
GW210PPB4	29.972	90	30.175	30.175
GW211PP3	39.89	100	33.325	33.325	7AS11-1 1/2 D1
GW211PPB3	39.89	100	33.325	33.325	3AS11-1 1/2 D1
GW211PP5	38.89	101.6	36.525	44.45
GW211PP17	38.89	100	33.325	44.45
GW211PPB17	38.89	100	33.325	44.45
GW214PPB4	52.2	125	39.675	39.675	3AS14-2D1
GW216PP2	58.8	140	30	63.5

Hex Bore Series
Bearing Number			Hex Shaft Size	B     nominal			A nominal			"B" & "A" TOL. -0/ to plus			D					Be nominal			Bi nominal		Be & Bi TOL. +0/ to minus			W
													nominal		TOL. -0/ to minus											nominal			TOL. +0/ to minus
202KRR3			9/16	.6480      16.459			.5630 14.300			.0050 .127			1..3780 35.000		.0005 .013			.4330 11.000			.5120     13.000		.0050 .127			.9720 24.689			.0050 .127
204KPP2			11/16	.7960      20.218			0..6950 17.653			.0050 .127			1..8504 47.000		.0005 .013			.5510 14.000			.8250     20.955		.0050 .127			1..1340 28.804			.0050 .127
204KRR2			11/16	.7960      20.218			.6950 17.653			.0050 .127			1..8504 47.000		.0005 .013			.5510 14.000			.8250     20.955		.0050 .127			1..1340 28.804			.0050 .127
204KRRB2			11/16	.7960      20.218			.6950 17.653			.0050 .127			1..8504 47.000		.0005 .013			.5510 14.000			.8250     20.955		.0050 .127			1..1340 28.804			.0050 .127
205KPP2			7/8	1..0100      25.654			.8760 22.250			.0050 .0127			2..0472 52.000		.0005 .013			.5910 15.000			1..0000     25.400		.0050 0.127			1..3340 33.883			.0050 .127
205KRR2			7/8	1..0100      25.654			.8760 22.250			.0050 .127			20.472 52.000		.0005 .013			.5910 15.000			1..0000     25.400		.0050 .127			1..3340 33.883			.0050 .127
205KPPB2			7/8	1..0100      25.654			.8760 22.250			.0050 .127			20.472 52.000		.0005 .013			.5910 15.000			1..0000     25.400		.0050 .127			1..3340 33.883			.0050 .127
205KRRB2			7/8	1..0100      25.654			.8760 22.250			.0050 .127			20.472 52.000		.0005 .013			.5910 15.000			1..0000     25.400		.0050 .127			1..3340 33.883			.0050 .127
206KRR6			1	1..1520      29.261			1..0010 24.425			.0050 .127			2..4409 62.000		.0005 .013			.6300 16.000			.9450     24.000		.0050 .127			1..5940 4.488			.0050 .127
206KRRB6			1	1..1520      29.261			1..0010 24.425			.0050 .127			2..4409 62.000		.0005 .013			.6300 16.000			.9450     24.000		.0050 .127			1..5940 4.488			.0050 .127
G207KPPB2			1 1/8	1..2980      32.969			1..1260 28.600			.0050 .127			2..8346 72.000		.0005 0.013			.7480 19.000			1..4840     37.694		.0050 0.127			1..8430 46.812			.0050 .127
207KRRB9			1 1/8	1..2980      32.969			1..1260 28.600			.0050 .127			2..8346 72.000		.0005 0.013			.7480 19.000			1..4840     37.694		.0050 0.127			1..8430 46.812			.0050 .127
207KRRB12			1 1/8	1..2980      32.969			1..1260 28.600			.0050 .127			2..8346 72.000		.0005 0.013			.7480 19.000			.9840     25.000		.0050 0.127			1..8430 46.812			.0050 .127
GW208PPB22			1 1/4	1..4500      36.830			1..2550 31.877			.0050 .127			3..1496 80.000		.0005 0.013			.8270 21.000			1..4380     36.520		.0050 0.127			2..0840 52.934			.0050 .127
W208KRRB6			1 3/8	1..5870      40.301			1..3760 34.950			.0050 .127			3..1496 80.000		.0005 .013			.8270 21.000			1..4380     1.438		.0050 0.127			2..0840 52.934			.0050 .127
W208PPB16			1 1/4	1..4500      36.652			1..2510 31.775			.0050 .127			3..1496 80.000		.0005 .013			.7090 18.000			1..4380     36.520		.0050 0.127			2..0840 52.934			.0050 .127
G209KPPB2			1 1/2	1..7300      43.942			1..5010 38.125			.0050 .127			3..3465 85.000		.0005 .0015			.7480 19.000			1..1810     30.000		.0050 .152			2..3050 58.547			.0050 .127
209KRRB2			1 1/2	1..7300      43.942			1..5010 38.125			.0050 .127			3..3465 85.000		.0005 .0015			.7480 19.000			1..1810     30.000		.0050 .127			2..3050 58.547			.0050 .127
GC211-32-NLC			1 3/4	2..0200      51.308			1..7510 44.475			.0050 .127			3..9370 100.000		.0006 .015			.9840 25.000			2..2500     57.150		.0060 .152			2..7461 69.750			.0050 .127

AGRICULTURAL BEARING 200 Series
Bearing Number			d					D				Bi					Be					W					W1
			nominal		TOL. +0/ to minus			nominal			TOL. +0/ to minus	nominal			TOL. +0/ tominus		nominal			TOL. +0/ to minus				TOL. +0/ to minus					TOL. +0/     tominus
203KR2			.6253 15.883		.0003 .008			1..5748 40.000			.0005 .013	.5510        14.000			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
BB203KRR2			.6400 16.260		.0050 .127			1..5748 40.000			.005 .013	.7200        18.288			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
203KRR2			.6400 16.260		.0050 .127			1..5748 40.000			.0005 .013	.7200        18.288			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
203KKRR2FD			.6400 16.260		.0050 .127			1..5748 40.000			.0005 .013	.7200        18.288			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
203KRR5			.5150 13.081		.0050 .127			1..5748 40.000			.0005 .013	.7200        18.288			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
203KRR7			.6693 17.000		.0003 .008			1..5748 40.000			.0005 .013	.6540        16.612			.0050 .127		.4720    12.000			.0050 .127		.9620      24.435		.0008 .020			--     .		--  .
204KR2			.7505 19.063		.0005 .013			17.805 45.225			.0005 .013	.6100        15.494			.0050 .127		.6100    15.494			.0050 .127		1..1310      28.727		.0008 .020			--     .		--  .
204KRR3			.7874 20.000		.0004 .010			1..8504 47.000			.0005 .013	.6990        17.755			.0050 .127		.5510    14.000			.0050 .005		1..1310      28.727		.0008 .020			--     .		--  .
205KR4			1..0005 25.413		.0005 .013			2..0472 52.000			.0005 .013	1..0000        25.400			.0050 .127		.5910    15.000			.0050 .127		1..3310      33.807		.0008 .020			1..6800 42.672		0..0008     0..0200
206KR7			1..1811 30.000		.0004 .010			2..4409 62.000			.0005 .013	.9450        24.000			.0050 .127		.6300    16.000			.0050 .127		1..5860      40.284		.0008 .020			2..0500 52.070		0..0008     0..0200
206KRR8			1..1811 30.000		.0004 .010			2..4409 62.000			.0005 .013	.9450        24.000			.0050 .127		.6300    16.000			.0050 .127		1..5390      39.091		.0008 .020			2..0500 52.070		0..0008     0..0200
207KRR			1..3780 35.000		.0005 .013			2..8346 72.000			.0005 .013	.9840        25.000			.0050 .127		.6690    17.000			.0050 .127		1..8480      46.939		.0008 .020			2..3760 60.350		0..0008     0..0200
208KRR			1..5780 40.000		.0005 .013			3..1496 80.000			.0005 .013	1..0630        27.000			.0050 .127		.8270    21.000			.0050 .127		2..0570      52.248		.0008 .020			2..6950 68.453		0..0008     0..0200

AGRICULTURAL BEARING SA Series
Unit No.	Shaft Dia.		Rated dynamic load Cr (KN)	Rated static
	d			load Cor (KN)	Mass (Kg)
	(in.)	(mm)
SA 201		12	9550	4780	0.13
SA 201-8	1/2''	12.7
SA 202		15
SA 202-10	5/8''	15.875
SA 203		17
SA 203-11	11/16''	17.463
SA  204-12	3/4''	19.05	12800	6650	0.16
SA 204		20
SA  205-14	7/8''	22.225	14000	7880	0.2
SA 205-15	15/16''	23.813
SA 205		25
SA 205-16	1''	25.4
SA 206-18	1-1/8''	28.575	19500	11200	0.33
SA 206		30
SA 206-19	1-3/16''	31.163
SA 206-20	1-1/4''	31.75
SA 207-20	1-1/4''	31.75	25700	15200	0.55
SA 207-21	1-5/16''	33.34
SA 207-22	1-3/8''	34.925
SA 207		35
SA 207-23	1-7/16''	36.5125
SA 208-24	1-1/2''	38.1	29600	18200	0.7
SA 208-25	1-9/16''	39.688
SA 208		40
SA  209-26	1-5/8''	41.275	31850	20800	0.7
SA 209-27	1-11/16''	42.863
SA 209-28	1-3/4''	44.45
SA 209		45
SA  210-30	1-7/8''	47.625	35100	23200	0.8
SA 210-31	1-15/16''	49.213
SA 210		50
SA  211-32	2''	50.8	43550	29200	0.85
SA 211-34	2-1/8''	53.975
SA 211		55
SA 211-35	2-3/16''	55.563
SA  212-36	2-1/4''	57.15	47800	32800	1.1
SA 212		60
SA 212-38	2-3/8''	60.325
SA 212-39		61.9125

SB  Series
Bearing No.			Basic  Load   Rating  (lbs.)	Basic  Static  Load   Rating  (lbs.)	Weight (lbs.)
	Bore Dia of Bearing d
	in	mm
SB201G		12	2040	1020	0.22
SB201-8G	1/2''
SB202G		15
SB202-10G	5/8''
SB203G		17
SB204-12G	3/4''		2740	1600	0.33
SB204G		20
SB205		25	3010	1750	0.4
SB205-14G	7/8''
SB205-15G	15/16''
SB205-16G	1''
SB206G		30	4200	2430	0.68
SB206-17G	1-1/16''
SB206-18G	1-1/8''
SB206-19G	1-3/16''
SB206-20G	1-1/4''
SB207G		35	5535	3340	1.06
SB207-20G	1-1/4''
SB207-21G	1-5/16''
SB207-22G	1-3/8''
SB207-23G	1-7/16''
SB208G		40	6375	3960	1.51
SB208-24G	1-1/2''
SB208-25G	1-9/16''
SBN  and  CSB Non-Relubricatable Inserts
CSB201		12	2040	1020	0.22
CSB201-08	1/2''
CSB202		15
CSB202-10	5/8''
CSB203		17
CSB204		20	2740	1600	0.33
CSB204-12	3/4''
CSB205		25	3010	1750	0.4
CSB205-14	7/8''
CSB205-15	15/16''
CSB205-16	1''
CSB206		30	4200	2430	0.68
CSB206-17	1-1/16''
CSB206-18	1-1/8''
CSB206-19	1-3/16''
CSB206-20	1-1/4''
CSB207		35	5535	3340	0.93
CSB207-20	1-1/4''
CSB207-21	1-5/16''
CSB207-22	1-3/8''
CSB207-23	1-7/16''
CSB208		40	6375	3960	1.32
CSB208-24	1-1/2''

BALL BEARING INSERT UEL - Eccentric locking collar type
Unit No.		Shaft Dia.		Eccentric         collar	Rated dynamic load Cr (KN)	Rated static load Cor (KN)	Mass (Kg)
		d
		(in.)	(mm)
UEL 202              202-10              203              203-11		5/8 11/16	15     17	A 202        202-10        203        203-11	9550	4780	0.22     0.21     0.20     0.19
UEL 204-12              204		3/4	20	A 204-12        204	12800	6650	0.23     0.22
UEL 205-14              205-15              205              205-16		7/8 15/16 1	25	A 205-14        205-15        205        205-16	14000	7880	0.29     0.27     0.25     0.24
UEL 206-18              206              206-19              206-20		1-1/8 1-3/16 1-1/4	30	A 206-18        206        206-19        206-20	19500	11200	0.43     0.41     0.40     0.38
UEL 207-20              207-21              207-22              207              207-23		1-1/4 1-5/16 1-3/8 1-7/16	35	A 207-20        207-21        207-22        207        207-23	25700	15200	0.68     0.65     0.61     0.60     0.58
UEL 208-24              208-25              208		1-1/2 1-9/16	40	A 208-24        208-25        208	29600	18200	0.83     0.79     0.78
UEL 209-26              209-27              209-28              209		1-5/8 1-11/16 1-3/4	45	A 209-26        209-27        209-28        209	31850	20800	0.96     0.91     0.87     0.85
UEL 210-30              210-31              210		1-7/8 1-15/16	50	A 210-30        210-31        210	35100	23200	1.10     1.04     1.01
UEL 211-32              211-34              211              211-35		2 2-1/8 2-3/16	55	A 211-32        211-34        211        211-35	43550	29200	1.58     1.44     1.39     1.36
UEL 212-36              212              212-38              212-39		2-1/4 2-3/8 2-7/16	60	A 212-36        212        212-38        212-39	47800	32800	2.03     1.87     1.85     1.76
UEL 213-40              213		2-1/2	65	A 213-40        213	57200	40000	2.51     2.41
UEL 214-44              214		2-3/4	70	A 214-44        214	60800	45000	2.58     2.57

BALL BEARING INSERT AEL - Eccentric locking collar type
Unit No.		Shaft Dia.		Rated dynamic load Cr (KN)	Rated static load Cor (KN)	Mass (Kg)
		d
		(in.)	(mm)
AEL 201             201-8             202             202-10             203             203-11		1/2 5/8 11/16	12 15 17	9550	4780	0,14 0,14 0,13 0,13 0,13 0,13
AEL 204-12             204		3/4	20	12800	6650	0,18 0,15
AEL 205-14             205-15             205             205-16		7/8 15/16 1	25	14000	7880	0,21 0,19 0,19 0,18
AEL 206-18             206             206-19             206-20		1-1/8 1-3/16 1-1/4	30	19500	11200	0,35 0,33 0,31 0,29
AEL 207-20             207-21             207-22             207             207-23		1-1/4 1-5/16 1-3/8 1-7/16	35	25700	15200	0,56 0,53 0,51 0,5 0,48
AEL 208-24             208-25             208		1-1/2 1-9/16	40	29600	18200	0,68 0,67 0,65
AEL 209-26             209-27             209-28             209		1-5/8 1-11/16 1-3/4	45	31850	20800	0,76 0,73 0,69 0,69
AEL 210-30             210-31             210		1-7/8 1-15/16	50	35100	23200	0,83 0,79 0,79
AEL 211-32             211-34             211             211-35		2 2-1/8 2-3/16	55	43550	29200	0,96 0,87 0,84 0,81
AEL 212-36             212             212-38             212-39		2-1/4 2-3/8 2-7/16	60	47800	32800	1,3 1,2 1,09
We have accurate complete catalog and technology sheets of agricultural bearings, such as Round bore, Square Bore, Hex Bore Series, 200 series, UEL series, AEL series, SA series, ER series, SB series, CSB series, etc, but due to page limitations, we only show a small part here. If you need, please contact with us to get the whole catalog.

More Choices

At the illustrious Allfine bearing factory, indulge in the luxury of "One-stop" shopping, where your desires and needs are met with unparalleled precision. Boasting an immense production capacity, our rigorous quality inspections ensure that every bearing meets the highest standards. Our commitment to superior quality assurance and flawless after-sales support empowers you to effortlessly fulfill your diverse and multi-model order demands, leaving you with absolute peace of mind.
In addition to our renowned Hex Bore Agricultural Bearing, our factory proudly manufactures an array of high-performance bearings. Explore our extensive catalogue, featuring deep groove ball bearings, tapered roller bearings, and spherical roller bearings. Discover the precision of cylindrical roller bearings and the alignment perfection of self-aligning ball bearings. We offer thrust ball and roller bearings, needle roller bearings, and a variety of other specialized bearings such as pillow block, insert, square bore agricultural, clutch, linear, radial spherical plain, and automotive bearings. All designed to meet your specific needs effortlessly.

Application

ALLFINE Bearings presents a comprehensive range of high-performance bearings tailored for an array of agricultural machinery. Our meticulously crafted bearings are ideal for disc harrows, planters, mowers, and rakes, as well as all varieties of balers. They're designed to enhance the efficiency and durability of tillage, seeding, and forage harvesters. Our superior disc harrow agricultural bearing ester equipment is engineered to meet the demanding conditions of combines, cotton pickers/stripers, and a wide spectrum of other agricultural apparatus, including silo unloaders and grain elevators. Recognizing the rigorous demands of agricultural machinery, ALLFINE Bearings are fortified with advanced sealing technologies specifically designed for environments laden with contaminants. Additionally, our bearings accommodate misalignment and feature cost-effective mounting solutions for both shafts and housings, ensuring reliable performance and extended service life in the field.

Our Advantages

Shandong Allfine Auto Parts Co., Ltd. stands as a beacon of precision and innovation in the world of bearing manufacturing. As a distinguished player in the industry, we seamlessly integrate research and development with production and sales, proudly boasting over 30 years of sophisticated bearing production expertise;


Our expansive manufacturing facility encompasses 10,000 square meters, housing 17 state-of-the-art bearing production lines. This enables us to achieve a remarkable annual output exceeding 300 million sets;


Shandong Allfine Auto Parts Co., Ltd. proudly supplies our premium quality bearings to clients in over 26 countries and counting; Among them are industry giants, including several in the TOP 5 within their local bearing markets;

We are committed to quality, having achieved the prestigious ISO9001:2000 International Quality Management System certification and SGS accreditation. Furthermore, our prowess is recognized by our government through the coveted Certificate of Import & Export.

Certifications

Packaging & Shipping

Our premium packaging solutions include:

Industrial package combined with an outer carton and sturdy pallets; ensuring maximum protection during transit.

Elegantly designed single box enclosed in an outer carton and secured on pallets for added safety.

Innovative tube package, safely nestled within a middle box, and cushioned with an outer carton and pallets.

Tailored packaging solutions crafted to meet your specific requirements, ensuring customer satisfaction.

FAQ

Q: Could you supply sample for free?
A: Yes, we provide free samples;
1) Samples quantity: 1-10 PCS are available.
2) Free samples: It depends on the Model No., and quantity. Some of the bearings samples need client to pay the shipping cost.

Q: Could you accept OEM and customize?
A: Yes, the customized LOGO or drawing is acceptable for us.
Our OEM policy as below:
1).We can printing your brand on the bearing.
2).We can custom your packaging includes the platic bag, individual box, outside carton according to your design;
3).All copyright own by clients and we promised don't disclose any info.

Q: How many the MOQ of your company?
A: Our company MOQ is 1pcs.

Q: Is it your company is factory or Trade Company?
A: We are factory, with over 10,000 square meter workshop, welcome you to visit us at any time, by any way.

Q: What is the quality guarantee of your bearing?
A: 1) The defect rate of the new goods that you receive is ZERO; 2) The service lif of the normal industrial bearing such as ball bearing is 2 years, the service life of the automotive bearings is at least 5,000 KM; Regard to the detailed quality guarantee of accurate bearing models,welcome to contact with our sales to get the detailes.

Q: What is the delivery time?
A: 7-15 days , mostly base on your order quantity;

Q: How to contact us quickly?
A: Please send us an inquiry or message, or leave your other contact information, such as Whatsapp number. We will contact you within 12 hours and provide the detailed information you need.


Extra Support:
We have professional catalog and data of all kinds of bearings, just tell me your item number, our price and quality detailed information will be offered to you within 12 hours.

We can satisfy you on difference aspects, such as the material of the bearings, the precision rating, the seals type, the OEM service,etc.