Small Diameter, Ball Bearing, Open Type

· Light load, medium/low speed, dedicated for medium precision rotation, achieving ultra-low price.
· It is made of industry standard bearing steel with high surface hardness and wear resistance.
· The vibration class of the product is above Z1

■Precautions when selecting
· Differences in specifications between MISUMI high-quality bearings and economy bearings [B6901ZZ (MISUMI quality bearing) and C-E6901ZZ (MISUMI economy bearing)]

Key points of economy series products confirmation

Inner Diameter d (mm)		Clearance of MISUMI quality products (μm)		Clearance of economy series products (μm)
or More	or Less	Minimum	Max.	Minimum	Max.
Less than 10		5	10	7	15

 

Part Number		d	D	B	r (min)	Basic Rated Load		Allowable Speed rpm (Reference)	Mounting Dimensions			Weight (g) (Reference)
Type	No.					Cr (Dynamic) N	Co (Static) N		Ds (min)	dh (max)	R (max)
C-E	683	3	7	2	0.1	218	78	44100	3.85	6.35	0.1	0.32
	603		9	3	0.15	400	132	39200	4.35	7.9	0.15	0.84
	623		10	4		442	153	35000		7.98		1.45
	624	4	5	5	0.2	910	340	33600	5.6	11.4	0.2	3.03
	634		16		0.3	938	366	25200	6.7	13	0.3	5.24
	605	5	14		0.2	930	355	28000	6.9	12.2	0.2	3.46
	625		16		0.3	1210	473	25200	7.5	13.8	0.3	4.95
	606	6	17	6		1584	592	26600	8.2	14.8		5.94
	626		19			1635	627	22400	8.5	16.5		8.12
	607	7				1568	637	30100	9	17		7.61
	627		22	7		2345	980	25200		20		12.7
	608	8				2305	965	23800	10.5	19.03		11.8
	628		24	8		2333	996	19600	11.9	19.9		17.1
	609	9		7		2380	1015	26600	11	22.8		14.5
	629		26	8		3185	1372	23800		24		19.5
C-ER	63	3	6	2	0.1	146	52	49700	3.7	4.9	0.1	0.2
	74	4	7			218	81	42000	4.75	6.25		0.23
	84		8		0.15	277	99	39200	5	6.8		0.39
	104		10	3	0.2	498	190	33600	6.15	8.35	0.15	0.96
	85	5	8	2	0.1	216	84	37100	5.75	7.25	0.1	0.25
	95		9	2.5	0.15	302	118	35000	6	7.8	0.15	0.54
	105		10	3		302		35000		0.78		0.91
	106	6		2.5		347	153	31500	7.04	8.9	0.1	0.55
	126		12	3	0.2	500	207	30100	7.73	10.19	0.15	1.25
	128	8		2.5	0.15	380	192	28000	9.05	10.9	0.1	0.7
	148		14	3.5	0.2	572	270	26600	9.86	12.19	0.15	1.9
C-MR	83	3	8	2.5	0.15	277	98	46900	4.2	6.8		0.54
	93		9		0.2	400	132	46200	4.6	7.4	0.2	0.73
	117	7	11		0.15	319	141	35000	8.2	9.8	0.15	0.62
	137		13	3	0.2	379	193	31500	8.6	11.4	0.2	1.58

kgf=N × 0.101972

・The interface radius of the channel located on the inner and outer ring is slightly larger than the radius of the sphere, in arc shape. Mainly supports radial loads.
· In addition to the open type bearings, there are bearings with steel dust cover, bearings with contact rubber seal packing and bearings with non-contact rubber seal packing, or bearings with stop ring on the outer diameter of outer ring.
Ball bearings with dust cover or seal packing are sealed with proper amount of high-quality grease. Deep groove ball bearings generally adopt steel plate stamped cage, which has low friction torque and accuracy grade of 0.

■ Features of MISUMI Economy Bearings
(1) Why are all MISUMI Economy Bearings tested for noise and vibration? And we insist on making our products at "Z1" grade or above
 Through testing the noise and vibration of bearings, it is possible to detect defects. Bearing vibration is classified into Z0, Z1, Z2, Z3, and Z4 levels (the higher the grade, the lower the noise and vibration).


(2) Why does MISUMI insist on using 'standard wall thickness' for economy bearings?


(3) Why does MISUMI insist on using high-performance "bearing steel" and "stainless steel" materials for its economy bearings?

*Products circulating on the market are similar products randomly purchased by our company from online or offline markets
* The test data are obtained through testing by our company, which are for reference only

When the precision of the shaft and bearing housing is poor, the bearing will be affected, and its due performance will not be exerted. For example, the poor precision of the mounting part with the bearing will cause relative inclination of the inner and outer rings. At this time, besides the bearing load, the edge load will be increased additionally, which will shorten the fatigue life of the bearing, and even more seriously, it will lead to damage such as cage breakage and sticking.

Please use the following special mounting tool for installation and removal

Bearing heater

Proper installation of the bearing heater can guarantee a long life of the bearing. Rolling bearings are reliable mechanical components with long service life if they are installed and maintained correctly. After the induction heater is used for heating, the bearing expands outward in the cylindrical direction, which can avoid the damage during installation. Induction heater is one of the most scientific heating methods, which does not need preheating, and can be heated to 110℃ in a few seconds or minutes depending on the weight of bearings, without damaging the prior lubrication

Bearing puller

When the installation state of the bearing is in the following situations, the special puller can be used for disassembly. (a) Shaft shape: cylindrical shaft, Inner diameter shape of bearing inner ring: cylindrical hole. (b) Shaft shape: cylindrical shaft, inner diameter shape of bearing inner ring with tight bushing: tapered hole. (c) Shaft shape: tapered shaft, Inner diameter shape of bearing inner ring: tapered hole. In either state, the lock nut of the shaft (or the lock nut of the tight bushing) must be released during disassembly, and the lock nut must be placed in a loose state.

MISUMI, the head office company, has been providing customers with various high-quality parts such as automation parts, mold parts, electronic parts, tool & consumables, etc. quickly and accurately since its establishment in Japan in 1963. By compiling product catalogs independently and establishing a marketing system for direct sales of products, a low-cost business operation mode has been created, and by making annual product plans according to customers' opinions and requirements, MISUMI brand-name products with high quality level have been continuously developed.

MISUMI established MISUMI Precision Machinery Co., Ltd. in China in June 2003, and then changed its name to MISUMI (China) Precision Machinery Trading Co., Ltd. in June 2007, with its headquarters in Shanghai. Since the beginning of the stamping die standard parts business, the businesses of FA standard parts, plastic die standard parts and machining tools have been officially started successively, and the rapid development of MISUMI in China has won the full support of customers. China's manufacturing industry has unlimited prospects, which is why China's manufacturing industry market has become one of the most competitive industries in the world.
MISUMI's business philosophy came into being - the key to the future development of China's manufacturing industry lies in cost competitiveness, "quality" and "time".
MISUMI's product quality is built by MISUMI in Japan in its 40-year business history. We offer world-class quality at very competitive prices. The delivery time marked in the catalog is agreed upon between us and our customers. Our strict compliance with delivery time has reached 99.96%. For MISUMI, customers’ time is the most precious resource, so we keep our promise strictly.

MISUMI will join hands with customers who value quality and time, and contribute our wisdom and strength to the development of China's manufacturing industry.