Miniature Ball Bearings

Name: Miniature Ball Bearings
Brand: Shaanxi Gainhui Heavy Industries Co., Ltd.
SKU: 170393586

Material: Chrome steel, Carbon steel
Precision: P0, P6, P5, P4, P2
Noise level: Z, Z1, Z2, Z3, Z4
Vibration: V, V1, V2, V3, V4
Radial clearance: C0, C3, C2, C4
Place of origin: Xi'an city, China
Package: Tube package, Single box
Supply ability: 100000 pieces per month
Certificate: ISO9001:2015

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Mô tả

● Introduction

Miniature ball bearings are suitable for high-speed and low-noise fields, including various industrial equipment, small rotary motors, etc. With the development of industrial technology, high-precision, high-performance and high-reliability mechanical equipment requires high-speed, low-vibration, small and maintenance-free bearings, etc. The outer diameter of miniature ball bearings is usually less than 9mm, and the minimum bearing inner diameter can be 0.6mm. Regarding their types, there are open type, 2Z type and 2RS type. As for the main materials, there are carbon steel, bearing steel, stainless steel, plastic, ceramics , etc.

Miniature Bearings are widely used in precision instruments, precision electrical equipment, precision equipment, office equipment, measuring equipment, micro motors, household equipment and toys and other related fields.

● Bearing Series

The types of the bearings include 68 series, 69 series and 60 series.

Sealed type (2RS)

Shielded type (2Z)

Sealed type (2RS)

● Production Details

◆ Quality requirements for bearing steel metallurgy

1. In the bearing steel standard, the qualified range of chemical composition is first specified.

2. The internal structure of the steel is uniform.

3. Non-metallic inclusions seriously affect the fatigue life of steel, and improving the purity of bearing steel is one of the important ways to improve bearing life.

4. Strictly control steel defects. Internal defects mainly include shrinkage cavities, bubbles, white spots, over-burning, porosity and segregation. Except for mild porosity and segregation, other defects are not allowed. External defects mainly refer to surface slag inclusions, cracks, burrs, folds, scarring and thick oxide skin, etc. These defects are not allowed to exist.

5. On the surface, no decarburization layer exceeding a certain concentration is allowed.

miniature ball

◆ Cleanliness of steel balls

In the whole processing of steel balls, we are paying more and more attention to the influence of cleanliness on high-precision precision steel balls, especially for mass production of G3 steel balls. First of all, the cleanliness of the flow of steel balls between processes, especially if the steel balls to be processed before the grinding process are not cleaned properly, the coarse abrasive particles and impurities in the previous process will be brought to the grinding process, which will scratch the surface of the steel balls and prolong the grinding process. The research cycle and the excessive consumption of the steel ball size will cause the change of the curvature of the channel, so that the steel ball cannot reach the various indicators that should be achieved. Secondly, the cleanliness of the grinding workshop environment is not good, and the dust in the air will directly affect the surface quality of the processed steel balls during the grinding process.

precision miniature bearings

● Rust Prevention for Bearings

The main factors affecting bearing rust:

1. Parts or finished products are wet by sweat on hands.

2. Sulphur dioxide, dust, moisture and other corrosive gases in the air.

3. Cooling water, rust-proof water, lubricating and rust-proof materials and finished oil seal packaging materials between processes have poor rust-proof ability or deterioration.

4. The cleaning solution (such as water that is not dehydrated after cleaning) is corrosive, causing the deterioration of the anti-rust material and the product to rust.

5. The inner and outer packaging materials are corrosive, or the packaging is damaged due to low mechanical strength, causing rust.

● Advantages

The company's own brand "GHB" products have passed ISO9001 quality management system certification, with accuracy levels of P0, P6, P5, and P4. Bearings are exported to more than 35 countries with a good reputation. The company insists on quality as the core, innovation as the driving force, promotes development through service, and sincerely provides services to customers all over the world.

● 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 miniature ball 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

Bearing designation	Dimensions (mm)										Basic dynamic load rating	Basic static load rating	Fatigue load limit	Limiting speed	Reference speed	Mass
	d	D	B	r	D1	D2	d1	da	Da	ra	Cr	Cor	Cur	nG	nB	m
				min.	≈	≈	≈	min.	max.	max.	N	N	N	min–1	min–1	≈kg
623	3	10	4	0.15	7.7	–	5	4.4	8.6	0.15	640	220	10.6	53 000	57 000	0.001
623-2RSR	3	10	4	0.15	–	8.2	5	4.4	8.6	0.15	640	220	10.6	32 000	–	0.001
623-2Z	3	10	4	0.15	–	8.2	5	4.4	8.6	0.15	640	220	10.6	45 000	57 000	0.001
624	4	13	5	0.2	10.5	–	7	5.8	11.2	0.2	1 290	490	24.6	45 000	46 500	0.003
624-2RSR	4	13	5	0.2	–	11.2	7	5.8	11.2	0.2	1 290	490	24.6	26 000	–	0.003
624-2Z	4	13	5	0.2	–	11.2	7	5.8	11.2	0.2	1 290	490	24.6	38 000	46 500	0.004
634	4	16	5	0.3	12.5	–	8.5	6.4	13.6	0.3	1 730	670	35.5	43 000	35 000	0.006
634-2RSR	4	16	5	0.3	–	13.2	8.5	6.4	13.6	0.3	1 730	670	35.5	24 000	–	0.006
634-2Z	4	16	5	0.3	–	13.2	8.5	6.4	13.6	0.3	1 730	670	35.5	36 000	35 000	0.006
625	5	16	5	0.3	12.5	–	8.5	7.4	13.6	0.3	1 320	440	22.4	43 000	36 500	0.005
625-2RSR	5	16	5	0.3	–	13.2	8.5	7.4	13.6	0.3	1 320	440	22.4	24 000	–	0.005
625-2Z	5	16	5	0.3	–	13.2	8.5	7.4	13.6	0.3	1 320	440	22.4	36 000	36 500	0.005
635	5	19	6	0.3	15.5	–	10.8	7.4	16.6	0.3	2 600	1100	53	40 000	31 500	0.008
635-2RSR	5	19	6	0.3	–	16.7	10.8	7.4	16.6	0.3	2 600	1100	53	22 000	–	0.008
635-2Z	5	19	6	0.3	–	16.7	10.8	7.4	16.6	0.3	2 600	1100	53	32 000	31 500	0.008
626	6	19	6	0.3	15.5	–	10.6	8.4	16.6	0.3	2 600	1100	53	38 000	32 500	0.008
626-2RSR	6	19	6	0.3	–	16.7	10.6	8.4	16.6	0.3	2 600	1100	53	22 000	–	0.008
626-2Z	6	19	6	0.3	–	16.7	10.6	8.4	16.6	0.3	2 600	1100	53	32 000	32 500	0.008
607	7	19	6	0.3	15.5	–	10.6	9	17	0.3	2 600	1100	53	38 000	34 500	0.007
607-2RSR	7	19	6	0.3	–	16.7	10.6	9	17	0.3	2 600	1100	53	22 000	–	0.007
607-2Z	7	19	6	0.3	–	16.7	10.6	9	17	0.3	2 600	1100	53	32 000	35 500	0.008
627	7	22	7	0.3	18	–	12.4	9.4	19.6	0.3	3 250	1370	72	36 000	30 000	0.011
627-2RSR	7	22	7	0.3	–	19.1	12.4	9.4	19.6	0.3	3 250	1370	72	20 000	–	0.011
627-2Z	7	22	7	0.3	–	19.1	12.4	9.4	19.6	0.3	3 250	1370	72	30 000	30 000	0.012
608	8	22	7	0.3	18	–	12.4	10	20	0.3	3 250	1370	72	36 000	31 500	0.01
608-2RSR	8	22	7	0.3	–	19.1	12.4	10	20	0.3	3 250	1370	72	20 000	–	0.01
608-2Z	8	22	7	0.3	–	19.1	12.4	10	20	0.3	3 250	1370	72	30 000	32 500	0.011
609	9	24	7	0.3	19.6	–	14	11	22	0.3	3 650	1630	89	36 000	28 500	0.015
609-2RSR	9	24	7	0.3	–	20.5	14	11	22	0.3	3 650	1630	89	20 000	–	0.016
609-2Z	9	24	7	0.3	–	20.5	14	11	22	0.3	3 650	1630	89	30 000	29 000	0.016
629	9	26	8	0.3	21.4	–	14.7	11.4	23.6	0.3	4 550	1960	93	34 000	25 500	0.02
629-2RSR	9	26	8	0.3	–	22.5	14.7	11.4	23.6	0.3	4 550	1960	93	19 000	–	0.021
629-2Z	9	26	8	0.3	–	22.5	14.7	11.4	23.6	0.3	4 550	1960	93	28 000	25 500	0.021