Combined Roller Bearings

Material: Chrome steel
Precision: P0, P6, P5
Cage material: Steel, PA66
Feature: High-precision, Low-noise, Long-life
Working temperature range: -20℃~120℃
Lubricated: Oil, Grease
Free samples and technical drawing: Available
Technology standard: JB/T 8877-2011
Certificate: ISO9001:2015

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Description

Combined roller bearings are a type of bearing designed to support radial, axial, and moment loads simultaneously. They combine elements of both radial and thrust bearings for enhanced efficiency and durability. These bearings are widely used in industrial machinery, robotics, construction equipment, and other applications that require high load capacity, low friction, and precise movement.

At our manufacturing facility in China, we produce high-quality combined roller bearings that meet the highest standards of performance and reliability. Our bearings are made from high-grade materials, such as chrome steel, and are crafted with precision and attention to detail.

One of the key features of our combined roller bearings is their ability to carry heavy loads with minimal friction. This is achieved through a unique design that utilizes multiple rows of cylindrical rollers or tapered rollers, depending on the application. These rollers are spaced evenly and precisely to distribute the load evenly, thereby reducing the stress on each individual roller.

Another advantage of our combined roller bearings is their versatility in accommodating different types of loads. These bearings can support radial loads, which are perpendicular to the axis of rotation, axial loads, which are parallel to the axis of rotation, and moment loads, which result from a combination of radial and axial forces. This makes them ideal for use in complex mechanical systems that require multiple forms of support and movement.

In addition to their load-bearing capabilities, our combined roller bearings are also designed for low friction, which enhances the efficiency and longevity of the system. By reducing friction, we can minimize wear and tear on the bearing, leading to longer lifetimes and fewer maintenance costs.

One area where our combined roller bearings excel is in high-speed applications. These bearings can operate at high speeds without sacrificing performance or durability, making them ideal for use in machinery that requires quick and precise movements. They are also designed to operate smoothly and quietly, reducing noise levels and improving overall performance.

At our manufacturing facility, we offer a wide range of combined roller bearings to meet the needs of our international customers. We can customize bearings to meet specific requirements or provide standard sizes and configurations for easy integration into existing machinery. Our products are competitively priced and backed by a commitment to quality and customer satisfaction.

To conclude, our combined roller bearings are an excellent choice for merchants looking for a reliable, high-quality bearing solution that can support multiple types of loads, operate at high speeds, minimize friction and noise, and enhance the overall performance of their mechanical systems. Contact us today to learn more about our products and services, and how we can help you meet your business needs.

● Introduction

Combined roller bearings consist of solid ring needle roller bearings, ball bearings and roller bearings, which can withstand unidirectional or bidirectional axial loads. The bearing has a compact structure, small volume, and high rotation accuracy. It can bear a high radial load and a certain axial load at the same time. The product structure is diverse, adaptable and easy to install. Combined roller bearings usually have the NKIA type which is a combination of needle roller and angular contact ball bearings. Type NKIB is a combination of needle roller and angular contact separable ball bearings. Types NX and NKX without inner ring needle roller bearing and thrust ball bearing combination. Type NKXR without inner ring needle roller bearing and thrust cylindrical roller bearing combination. Combined needle roller and bidirectional thrust cylindrical roller bearings, types ZARF and ZARN.

Combined needle roller bearings are widely used in textile machinery, printing machinery, automobile industry, machine tools, metallurgical machinery, printing machinery and other mechanical equipment.

● Bearing Series

The types of the bearings include NX series, NX..-Z series, NKX series, NKX..-Z series, NKXR series, NKXR..-Z series, NKIA series, NKIB series, ZARF series, ZARF..-L series, ZARN series and ZARN..-L series.

NX type

NKX type

NKXR type

NKIB type

ZARN type

ZARF type

● Production Details

◆ Process needle rollers

Generally, needle rollers are divided into round heads and flat heads. Tolerance classes are G2, G3 and G5, which are a combination of needle diameter and shape tolerances. For specific details, please refer to the relevant provisions of national standards. The cylindrical surface of the needle roller is only allowed to protrude in the middle, and the Ra is not more than 0.2um. It is not allowed to have defects such as cracks and rust. The manufacturing process of the needle roller is related to the structure and shape of the end face of the needle roller and the forming method of the blank. The manufacturing process of a round head needle roller for turning a blank is as follows: breaking the trapezoidal head of the car → channeling → soft grinding of the end face → hot cleaning and drying → upsetting round head → soft channeling round head → heat treatment → hard channeling round head → rough grinding of outer diameter → fine grinding outer diameter → final grinding outer diameter → hot cleaning, drying, wiping → sawdust polishing → final inspection and sorting → oiling and packaging.

na 4914 bearing

◆ Universal length measuring instrument

The universal length measuring instrument is an optical measuring instrument that can measure both directly (0~100mm) and comparatively (0~500mm). It can not only measure the inner and outer dimensions, but also the diameter of the small hole (ф1~ф20mm), the pitch diameter of the thread, etc. The graduation value of the universal length measuring instrument is 0.001mm. Measuring range: direct measurement of external dimensions is 0~100mm, and comparative measurement of external dimensions is 0~500mm. The inner dimension measurement range is 10~200mm, and 1~20mm when using the electric eye device. The measuring range of the pitch diameter of the external thread is 0~180mm, and the measuring range of the pitch diameter of the internal thread is 14~140mm.

needle bearing price

● Annealing Process of Bearing Steel

The annealing heating temperature range of GCr15 bearing steel should be 780~810℃, usually 790±10℃ is more appropriate. When the heating temperature of GCr15 steel exceeds 730~765℃, pearlite begins to transform into austenite. The higher the temperature, the more uniform the austenite structure, the less undissolved carbides, and the flaky pearlite structure is easily formed after cooling. Therefore, 840 °C is the upper limit of the annealing temperature, beyond this temperature, coarse pearlite will appear in the annealed structure. In short, if the temperature is too high, the workpiece will overheat and become a substandard product. If the temperature is too low, part of the flaky pearlite after forging will be retained, and it will no longer crystallize into fine spherical pearlite, making its hardness too high and causing unqualified products.

● Standard

◆ ISO 15 Rolling bearings - Radial bearings - Boundary dimensions, general plan.

◆ ISO 76 Rolling bearings. Static load rating.

◆ ISO 281 Rolling bearings. Dynamic load and lifetime.

◆ ISO 492 Rolling bearings. Radial Bearings. Tolerances.

◆ ISO 582 Rolling bearings. Chamfer dimensions - Maximum values.

◆ ISO 1132-2 Rolling bearings. Tolerances. Measuring and checking methods and principles.

◆ ISO 5753 Rolling bearings. Inner radial clearance.

● FAQ (Frequently Asked Questions)

Q1: How long will our the inquiry and question be answered?

A1: After receiving your inquiry and question, we will reply you within 1 to 6 hours.

Q2: How about the quality of bearings?

A2: We supply high quality bearings and strictly follow ISO9001 standard for production.

Q3: What is the MOQ of the products?

A3: Usually the MOQ is 1 piece, and depending on the model.

Q4: How about the Delivery time of the products?

A4: Usually the delivery time is 3 to 15 days, and depending on the quantity.

Q5: How do you control the quality of the products and check the quality before delivery?

A5: Our company has a professional quality inspection department, which strictly controls the quality of products, and has complete after-sale service.

● About Us

Shaanxi Gainhui Heavy Industries Co., Ltd. is a professional bearing manufacturer and and distributor in china. Equipped with a professional large factory, we can supply competitive bearing products and OEM service to worldwide customers. With high quality, competitive price and great after-sale service of combined roller bearings, welcome to contact us in time.

Because we are focused, we are professional.

● Packing Methods

Tube Package

Single Box Package

Pallet Package

● Delivery Methods

By Express

By Sea

By Air

● Technical Parameters

combined roller bearing

Bearing designation	Mass	Dimensions (mm)																				Basic dynamic load rating	Basic static load rating	Basic dynamic load rating	Basic static load rating	Limiting speed
	m	d	D	H	H1	H2	H3	C	C1	D1	D2	D3	B	B1	B2	r	r1	d1	J	Da	da	Ca	Coa	Cr	Cor	Oil	Grease
	≈kg															min.	min.			max.	min.	N	N	N	N	min–1	min–1
ZARF1560-TV	0.42	15	60	40	26	–	–	14	8	35	–	–	7.5	–	–	0.3	0.6	3.2	46	36	28	24 900	53 000	13 000	17 500	8 500	2 200
ZARF1560-L-TV	0.45	15	60	–	–	53	39	14	8	35	24	34	7.5	20.5	11	0.3	0.6	3.2	46	36	22	24 900	53 000	13 000	17 500	8 500	2 200
ZARF1762-TV	0.49	17	62	43	27.5	–	–	14	8	38	–	–	9	–	–	0.3	0.6	3.2	48	39	28	26 000	57 000	14 000	19 900	7 800	2 100
ZARF1762-L-TV	0.52	17	62	–	–	57	41.5	14	8	38	28	38	9	23	11	0.3	0.6	3.2	48	39	26	26 000	57 000	14 000	19 900	7 800	2 100
ZARF2068-TV	0.56	20	68	46	29	–	–	14	8	42	–	–	10	–	–	0.3	0.6	3.2	53	43	33	33 500	76 000	14 900	22 400	7 000	2 000
ZARF2068-L-TV	0.61	20	68	–	–	60	43	14	8	42	30	40	10	24	11	0.3	0.6	3.2	53	43	28	33 500	76 000	14 900	22 400	7 000	2 000
ZARF2575-TV	0.78	25	75	50	33	–	–	18	10	47	–	–	10	–	–	0.3	0.6	3.2	58	48	39	35 500	86 000	22 600	36 000	6 000	1 900
ZARF2575-L-TV	0.84	25	75	–	–	65	48	18	10	47	36	45	10	25	11	0.3	0.6	3.2	58	48	34	35 500	86 000	22 600	36 000	6 000	1 900
ZARF3080-TV	0.85	30	80	50	33	–	–	18	10	52	–	–	10	–	–	0.3	0.6	3.2	63	53	44	39 000	101 000	24 300	41 500	5 500	1 800
ZARF3080-L-TV	0.9	30	80	–	–	65	48	18	10	52	40	50	10	25	11	0.3	0.6	3.2	63	53	38	39 000	101 000	24 300	41 500	5 500	1 800
ZARF3590-TV	1.12	35	90	54	35	–	–	18	10	60	–	–	11	–	–	0.3	0.6	3.2	73	61	50	56 000	148 000	26 000	47 000	4 800	1700
ZARF3590-L-TV	1.25	35	90	–	–	70	51	18	10	60	45	58	11	27	12	0.3	0.6	3.2	73	61	43	56 000	148 000	26 000	47 000	4 800	1700
ZARF40100-TV	1.35	40	100	54	35	–	–	18	10	65	–	–	11	–	–	0.3	0.6	3.2	80	66	55	59 000	163 000	27 500	53 000	4 400	1600
ZARF40100-L-TV	1.45	40	100	–	–	70	51	18	10	65	50	63	11	27	12	0.3	0.6	3.2	80	66	48	59 000	163 000	27 500	53 000	4 400	1600
ZARF45105-TV	1.7	45	105	60	40	–	–	22.5	12.5	70	–	–	11.5	–	–	0.3	0.6	6	85	71	60	61 000	177 000	38 000	74 000	4 000	1500
ZARF45105-L-TV	1.85	45	105	–	–	75	55	22.5	12.5	70	56	68	11.5	26.5	12	0.3	0.6	6	85	71	54	61 000	177 000	38 000	74 000	4 000	1500
ZARF50115-TV	2.1	50	115	60	40	–	–	22.5	12.5	78	–	–	11.5	–	–	0.3	0.6	6	94	79	67	90 000	300 000	40 000	82 000	3 600	1200
ZARF50115-L-TV	2.45	50	115	–	–	78	58	22.5	12.5	78	60	78	11.5	29.5	12	0.3	0.6	6	94	79	58	90 000	300 000	40 000	82 000	3 600	1200
ZARF2080-TV	1.1	20	80	60	38	–	–	18	10	52	–	–	12.5	–	–	0.3	0.6	3.2	63	53	38	64 000	141 000	22 600	36 000	6000	1500
ZARF2080-L-TV	1.22	20	80	–	–	75	53	18	10	52	40	50	12.5	27.5	11	0.3	0.6	3.2	63	53	38	64 000	141 000	22 600	36 000	6000	1500
ZARF2590-TV	1.6	25	90	60	38	–	–	18	10	62	–	–	12.5	–	–	0.3	0.6	3.2	73	63	45	80 000	199 000	24 300	41 500	4900	1400
ZARF2590-L-TV	1.75	25	90	–	–	75	53	18	10	62	48	60	12.5	27.5	11	0.3	0.6	3.2	73	63	45	80 000	199 000	24 300	41 500	4900	1400
ZARF30105-TV	1.95	30	105	66	41	–	–	18	10	68	–	–	14	–	–	0.3	0.6	3.2	85	69	52	107 000	265 000	26 000	47 000	4400	1300
ZARF30105-L-TV	2.15	30	105	–	–	82	57	18	10	68	52	66	14	30	12	0.3	0.6	3.2	85	69	50	107 000	265 000	26 000	47 000	4400	1300
ZARF35110-TV	1.6	35	110	66	41	–	–	18	10	73	–	–	14	–	–	0.3	0.6	3.2	88	74	60	105 000	265 000	27 500	53 000	4000	1250
ZARF35110-L-TV	1.85	35	110	–	–	82	57	18	10	73	60	73	14	30	12	0.3	0.6	3.2	88	74	58	105 000	265 000	27 500	53 000	4000	1250
ZARF40115-TV	2.7	40	115	75	47.5	–	–	22.5	12.5	78	–	–	16	–	–	0.3	0.6	6	94	79	65	117 000	315 000	38 000	74 000	3700	1200
ZARF40115-L-TV	3	40	115	–	–	93	65.5	22.5	12.5	78	60	78	16	34	12	0.3	0.6	6	94	79	58	117 000	315 000	38 000	74 000	3700	1200
ZARF45130-TV	3.9	45	130	82	51	–	–	22.5	12.5	90	–	–	17.5	–	–	0.3	0.6	6	105	91	70	154 000	405 000	40 000	82 000	3300	1150
ZARF45130-L-TV	4.3	45	130	–	–	103	72	22.5	12.5	90	70	88	17.5	38.5	14	0.3	0.6	6	105	91	68	154 000	405 000	40 000	82 000	3300	1150
ZARF50140-TV	4.2	50	140	82	51	–	–	22.5	12.5	95	–	–	17.5	–	–	0.3	0.6	6	113	96	75	172 000	480 000	42 000	90 000	3 100	1100
ZARF50140-L-TV	4.65	50	140	–	–	103	72	22.5	12.5	95	75	93	17.5	38.5	14	0.3	0.6	6	113	96	73	172 000	480 000	42 000	90 000	3 100	1100
ZARF55145-TV	4.5	55	145	82	51	–	–	22.5	12.5	100	–	–	17.5	–	–	0.3	0.6	6	118	101	85	177 000	500 000	44 000	98 000	2 900	1000
ZARF55145-L-TV	5	55	145	–	–	103	72	22.5	12.5	100	80	98	17.5	38.5	14	0.3	0.6	6	118	101	78	177 000	500 000	44 000	98 000	2 900	1000
ZARF60150-TV	4.7	60	150	82	51	–	–	22.5	12.5	105	–	–	17.5	–	–	0.3	0.6	6	123	106	90	187 000	550 000	44 500	92 000	2 700	950
ZARF60150-L-TV	5.35	60	150	–	–	103	72	22.5	12.5	105	90	105	17.5	38.5	16	0.3	0.6	6	123	106	88	187 000	550 000	44 500	92 000	2 700	950
ZARF65155-TV	5.1	65	155	82	51	–	–	22.5	12.5	110	–	–	17.5	–	–	0.3	0.6	6	128	111	97	172 000	500 000	54 000	104 000	2 600	900
ZARF65155-L-TV	5.7	65	155	–	–	103	72	22.5	12.5	110	90	108	17.5	38.5	16	0.3	0.6	6	128	111	88	172 000	500 000	54 000	104 000	2 600	900
ZARF70160-TV	5.2	70	160	82	51	–	–	22.5	12.5	115	–	–	17.5	–	–	0.3	0.6	6	133	116	100	201 000	630 000	56 000	119 000	2 400	800
ZARF70160-L-TV	5.95	70	160	–	–	103	72	22.5	12.5	115	100	115	17.5	38.5	16	0.3	0.6	6	133	116	98	201 000	630 000	56 000	119 000	2 400	800
ZARF75185-TV	9.4	75	185	100	62	–	–	27	15	135	–	–	21	–	–	0.3	1	6	155	136	113	290 000	890 000	72 000	132 000	2 100	700
ZARF75185-L-TV	10.6	75	185	–	–	125	87	27	15	135	115	135	21	46	16	0.3	1	6	155	136	110	290 000	890 000	72 000	132 000	2 100	700
ZARF90210-TV	13.7	90	210	110	69.5	–	–	32	17.5	160	–	–	22.5	–	–	0.3	1	8	180	161	130	325 000	1030000	98 000	210 000	1 800	700
ZARF90210-L-TV	15.1	90	210	–	–	135	94.5	32	17.5	160	130	158	22.5	47.5	16	0.3	1	8	180	161	125	325 000	1030000	98 000	210 000	1 800	700

For more data, please click the download button at the top of this page to download the catalogue.

Why choose us?

We strive to minimize our carbon footprint and reduce our energy consumption in the manufacturing of our Needle Roller Bearings products.
Our company will, as always, do our best to produce high quality products for you.
We offer a range of services to our clients, from product design and development to manufacturing and distribution of our Needle Roller Bearings products.
We insist on ensuring the production of high-quality Combined Roller Bearings with professional manufacturing technology and expert management methods.
Our clients appreciate our commitment to quality and value when it comes to our Needle Roller Bearings products.
We integrate new technology, new materials and new ideas into product design.
Our team of professionals take pride in their work and are committed to producing the best quality Needle Roller Bearings products.
We have a mature logistics system and strong storage capacity, fast delivery, delivery time.
We work closely with our clients to understand their needs and provide customized solutions with our Needle Roller Bearings products.
Our talent view is that talent is the most valuable wealth of the enterprise, let ordinary people do extraordinary things, let employees work happily.

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