SER Regreaseable Insert Bearing Series

SYSTEM DESCRIPTION:

1. Superior Regreaseable Design

Unlike standard sealed bearings, the SER series emphasizes a “regreaseable” function. This design allows users to replenish lubricant during operation, which effectively flushes out internal contaminants and significantly extends the bearing’s service life in heavy-duty or harsh environments.

2. Extensive Specifications: Metric and Imperial Compatibility

This series offers exceptional flexibility in sizing to meet diverse needs from small machinery to heavy industrial equipment:

Bore Range: Supports shaft diameters ranging from 12mm to 75mm.
Global Compatibility: In addition to standard metric models (e.g., SER 201 to SER 215), the series supports a wide array of Imperial shaft diameters, including 1/2", 1", 2", and up to 2-15/16", ensuring perfect fit for international mechanical designs.

3. Robust Load and Structural Parameters

The SER series excels in physical performance, with specific load ratings that ensure stable operation:

High Load Capacity: For example, the SER 215 model features a dynamic load rating (Cr) of 50.8 KN and a static load rating (Cor) of 49.5 KN.
Precision Engineering: Each model is defined by detailed dimensions (D, B, C, S, G) to ensure installation accuracy. For instance, the SER 210 model utilizes M10×1.25 set screws (ds) for secure axial locking.

4. Premium Materials and Quality Assurance

High-Quality Chrome Steel: The entire series is crafted from Gcr15 chrome steel, with a strictly controlled chemical composition (Chromium content 1.30-1.65%) to ensure high hardness and wear resistance.
Precision Classes: The products support multiple tolerance standards, from ABEC1 to ABEC7 (or P0 to P4), suitable for everything from standard conveyors to high-precision machinery.

TECHNICAL DRAWING:

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PRODUCT DETAILS:

Bearing No.		Shaft Dia.		Dimension mm in.										Dynamic load	Statie load	Weight (kg)
		d												ratings	ratings
		(in.)	(mm)	D	B	C	S	a	b	P	G	h	ds	Cr （KN）	Cor （KN）
SER	201		12	47 1.8504	31 1.2205	15.9 0.6260	10.3 0.4055	2.38 0.0937	1.07 0.0420	52.7 2.0748	4.7 0.185	4.4 0.1732	M6×1 1/4-28UNF	9.88	6.65	0.27
	201-8	1/2														0.27
	202		15													0.25
	202-9	9/16														0.24
	202-10	5/8														0.24
	203		17													0.23
	203-11	11/16														0.23
	204		20													0.20
	204-12	3/4														0.22
SER	205		25	52 2.0472	34 1.3740	19 0.7480	13.08 0.5150	2.38 0.0937	1.07 0.0421	57.9 2.2795	5.5 0.2166	4.5 0.1772	M6×1 1/4-28UNF	10.8	7.88	0.21
	205-14	7/8														0.23
	205-15	15/16														0.22
	205-16	1														0.2
SER	206		30	62 2.4409	38.1 1.5000	22.2 0.8740	15.9 0.6260	3.18 0.1252	1.65 0.0650	67.7 2.6654	5.5 0.2165	5.3 0.2087	M6×1 1/4-28UNF	15	11.2	0.35
	206-18	1-1/8														0.37
	206-19	1-3/16														0.35
	206-20	1-1/4														0.35
SER	207		35	72 2.8346	42.9 1.6890	23.8 0.9370	17.5 0.6890	3.18 0.1252	1.65 0.0650	78.6 3.0945	6.5 0.2559	5.8 0.2283	M8×1 5/16-28UNF	19.8	15.2	0.51
	207-20	1-1/4														0.56
	207-21	1-5/16														0.54
	207-22	1-3/8														0.52
	207-23	1-7/16														0.48
SER	208		40	80 3.1496	49.2 1.9370	27.8 1.0945	19 0.7480	3.18 0.1252	1.65 0.0650	89.6 3.4094	8 0.3150	6.3 0.2480	M8×1 5/16-28UNF	22.8	18.2	0.68
	208-24	1-1/2														0.72
	208-25	1-9/16														0.68
SER	209		45	85 3.3465	49.2 1.9370	27.8 1.0945	19 0.7480	3.18 0.1250	1.65 0.0650	91.6 3.6063	8 0.3150	7.5 0.2953	M8×1 5/16-28UNF	24.5	20.8	0.90
	209-26	1-5/8														0.81
	209-27	1-11/16														0.82
	209-28	1-3/4														0.80
SER	210		50	90 3.5433	51.6 2.0315	28.6 1.1260	19 0.7480	3.18 0.1252	2.41 0.9490	96.5 3.7992	9 0.3543	6.8 0.2677	M10×1.25 3/8-24UNF	27	23.2	0.86
	210-30	1-7/8														0.92
	210-31	1-15/16														0.87
SER	211		55	100 3.9370	55.6 2.1890	30.2 1.1890	22.2 0.8740	3.18 0.1252	2.41 0.0949	106.5 4.1929	9 0.3543	7.6 0.2992	M10×1.25 3/8-24UNF	33.5	29.2	1.15
	211-32	2														1.28
	211-34	2-1/8														1.18
	211-35	2-3/16														1.12
SER	212		60	110 4.3307	65.1 2.5630	31.8 1.2520	25.4 1.0000	3.18 0.1252	2.41 0.0949	116.6 4.5906	10.5 0.4134	8.4 0.3307	M10×1.25 3/8-24UNF	36.8	32.8	1.58
	212-36	2-1/4														1.70
	212-38	2-3/8														1.56
	212-39	2-7/16														1.48
SER	214		70	125 4.9213	74.6 2.9370	35 1.3780	30.2 1.1890	3.96 0.1559	2.77 0.1091	134.7 5.3031	12 0.4724	9 0.3543	M12×1.25 7/16-20UNF	44	40	2.52
	214-40	2-1/2
	214-43	2-11/16
SER	215		75	130 5.1181	77.8 3.0630	38.1 1.5000	33.3 1.3110	3.96 0.1559	2.77 0.1091	139.7 5.5000	12 0.4724	9.5 0.3740	M12×1.25 7/16-20UNF	50.8	49.5	2.89
	215-46	2-7/8
	215-47	2-15/16

Tolerance Class

Standard	Tolerance class
GB/T307.1	PO	P6	P5	P4
IS0492	C LASSO	CLASS6	CLASS5	CLASS4
AFBMA STD.20	ABEC1	ABEC3	ABEC5	ABEC7

Bearing Material

Chrome Steel: Chemical Composition of Chrome Steel

Steel No	Chemical Composition%
Steel No	C	Si	Mn	P	S	Cr
Gcr15	0.95-1.05	0.15-0.35	0.20-0.40	≤0.027	≤0.02	1.30-1.65

The Interchange of Chrome Steel No.

Country	China	ISO	U.S.A	Germany	Japan	Sweden
Bearings Steel No.	Gcr15	638/XVII 1	(AISI)52100	(DIN)100Cr6	(Jis)SVJ2	SKF3

Packing

Tube packing, single box packing or other industrial packing are all available.Special requirements should be mentioned in the order

Our own NSJ package is as below

Company Profile

Ningbo Sanya Bearing Co., Ltd. is a professional China SER Regreaseable Insert Bearing Series Manufacturers and SER Regreaseable Insert Bearing Series Factory.We established in 1994 stands right at the prime location of the Yangtze River Delta. Specialized in the production of high-quality deep groove ball bearings and insert bearings. It has emerged as a modern company integrating product development, design, manufacturing, sales and service. It can produce bearings with an inner diameter of 3mm to 100mm and customize various non-standard Custom Series 6000 Two Contact Seals Deep Groove Ball Bearing with highly-automated equipment, stable quality, and complete testing methods ensuring the quality of its products. With the vigorous development of the foreign trade department, our business in bearing production and sales in 2018 far exceeded 20 million US dollars, and the products were sold in more than 50 countries and regions.

The company has established a modernized enterprise management system, pooling talents in various fields to make the company more humane, informatized and international with the ISO9001 quality management system being introduced to the production process to enhance its competitiveness. In 2017, the ISO/TS16949 quality management system was also introduced to seek further development in richer application field.

Taking "integrity; service; cooperation; win-win " as the core values, and "customer, order primacy" as its working philosophy, adhering to the vision of becoming China's bearing supplier, while satisfying the customers and helping employees achieve their dreams, it is constantly heading towards the goal of "get the world move with Chinese Bearings ".