We can provide free samples . Please contact Email for any inquiries

1 observe the appearance and packaging
Internal and external KOYO bearing rings and rolling oil wipe the surface should be smooth as a mirror, glass like smooth and delicate, with obvious end, for processing the trace. The dust shell, shell surface roughness of the dust can be greater part, but there is no any corrosion phenomena.
2 see the sign
The origin of the KOYO bearing outside surface engraved code, date of manufacture, and other marks, should look at. Bearing very small font knowledge, but most of the use of genuine stamp technique, but not before the heat treatment the embossing, so the font may be small, but a deep concave, very clear. Fuzzy fonts counterfeit and shoddy products, rough technology.
3 pass the test
Check the condition of the user usually does not have a standard, but the angle (angle) check the gap, can be simple and effective. Because the bearing clearance is small, but very thin tentacles, low strength, and because the structure bearing side foot not easy, the blockage of the antenna should be near the middle of rolling and rolling body on the top of the two position and the rotary bearing inner ring, easy access to side foot KOYO bearing surface. If you can force because the roll, and then half the measured value is bearing clearance values; to roll in, when you feel too loose or too tight, they should be thickening or thinning of the proper antenna. It should be pointed out, insert antennae, if roll feeling is too difficult, should not be forced to launch angle, to avoid damage, and shall check the roll.
4 listen to the noise
The left hand holding the KOYO bearing inner ring, outer ring rotation hit right, listen to whether there is noise. Because in the process of production of fake and shoddy products are mostly hidden in the inevitable impurities bearing, rotation will be issued when the noise.
KOYO bearings lubrication is best stop during the implementation of the plan of equipment, and supplement on a regular basis, at the same time, the old grease removed through oil spills or empty the old grease out. Prior to joining the fresh oil injection inlet should be clean. If the bearing box without grease nipple, should open the housing lid or cover, in order to remove the old grease, clean, add fresh oils of the same model.
Rotary recorded activity refers to the finished bearings KOYO bearings and assembly after starting up, the bad phenomenon should not death card, card lag, emergency stop. Bearing in universal rolling series of requirements, including the dimensions, tolerances and grade and public, code, chamfer dimension maximum, radial clearance, bearing rings and rolling body material, the hardness of parts, the vibration value, interchangeability, measuring method, rated load and rated life, signs, inspection rules, packaging, residual magnetism, surface quality, cleanliness, rotational flexibility. The surface quality including signs, beautiful, roughness, there is damage, crack, broken, black, burrs, rust and other phenomena are not allowed.
KOYO bearing vibration lines sound directly with the rolling bearing noise surface waviness related, this is a pure tone noise, for a constant speed, its frequency is also unchanged, while for variable speed, its frequency change.
KOYO bearings need to periodically check the oil level and oil lubricants, under normal circumstances, the normal level for the equipment level windows or labeled 1/3-2/3 range. Fill the cup of oil for oil, oil level display only oil filling capacity, while the bearing box oil level is to meet the operational requirements of the oil, the oil level in the lower than the total volume of 1/4 oil supplement may be considered.

TANCHIN INTERNATIONAL INDUSTRIES CO.,LIMITEDADD:Room 1701,17/F,HENAN BUILDING,NO.90 JAFFE ROAD,WANCHAI HONGKONG
KOYO bearing the correct installation and maintenance is an important factor, the normal operation of bearings at the same time, we must pay attention to maintain cleanliness of bearing. Bearings must be protected from contaminants and moisture contamination, must have the correct installation and lubrication. In addition, the lubricant oil seal design, bearing arrangement condition, form and replacement period and special care also play an important role, must pay attention.