Hall No.
UC208 FJ insert bearings
  • UC208 FJ insert bearings

UC208 FJ insert bearings

Product Detail

1, we are factory, got ISO9001 approved 

2, factory have own turnning, grinding ,Assembly line

we mainly produce : Insert Bearing 

below through 7 points to intruduce our insert bearings :

一, Steel material : 

Both the inner and outer ring steels of Z&R insert bearings are made of Xingcheng Special Steel SKF 3 or Daye Steel’s vacuum degassed steel. This high-quality steel is subjected to constant temperature grinding by a high-precision grinder and super-finishing raceway mirror surface. The service life of ordinary steel is increased by more than 30%, which significantly reduces maintenance costs

二,Heat treatment of insert bearing

All Z&R insert bearings adopt the Xbite bainite heat treatment process to provide excellent crack resistance, higher strength, surface hardness and dimensional stability for the inner and outer rings of the bearing; thereby making the inner and outer rings more wear-resistant and higher fatigue resistance Strength, extend its service life by more than 30%

三,Enhanced internal knurled screw

Z&R insert bearings are locked with 3A grade nylon-coated enhanced inner knurled screws, which effectively prevent the screws from loosening under vibration conditions. High-frequency annealing treatment is performed in the area near the set screw holes to increase the tightening of the set screws. Effective, the tightening force of the set screw is increased by 20%, and a variety of set screw styles and screw hole locking angles of 62°, 90°, and 120° can be selected according to your requirements

四,G10 grade Z4 photoelectric steel ball

Z&R's full range of insert bearing conventional products use G10Z4 level seagull photoelectric steel balls. The high-quality steel balls effectively reduce the product vibration and noise value; at the same time, in order to meet different operating environments, it can also provide higher G5 grade or Japanese Tsubaki Nakajima brand steel balls For customers to choose


Z&R insert  bearing retainer adopts PA66 retainer and ion-nitriding silent retainer to meet the requirements of different use environments, respectively, to meet the high speed and high load requirements of insert bearing; the friction of PA66 retainer to steel ball is lower than metal retention The friction of the device on the steel ball greatly reduces the running noise


According to statistics, more than 36% of premature bearing failures are caused by poor lubrication. In fact, many low-speed application failures are caused by Run

Slippage is not caused by bearing fatigue. The lubrication performance of Z&R outer spherical bearings has been optimized and passed the life test, filled with grease that meets different occasions, temperatures, speeds and environments; the full range is equipped with Shell Gadus S2V100 2,

Shell Alvania RL3, ExxonMobil EM, Chevron SRI-2, KRYTOX240AC/GPL and other brand greases are available for customers to choose

七, SEAL -- R3, R5, F , SF, FJ .etc

R3 seal: used for conventional Z&R insert bearing products. The vulcanized triple-lip contact seal made of low-friction nitrile rubber (NBR) compound is bonded to the inner surface of the steel frame through vulcanization. The triple lip strongly prevents dust and muddy water It can ensure the life of the bearing even in severe environmental conditions, and is suitable for under 1000RPM/Min.

R5 seal: used for maintenance-free products of Z&R insert bearings, suitable for extremely polluted environments, such as agricultural machinery and chemical equipment applications, through vulcanization, vulcanized five-lip contact seals made of low-friction nitrile rubber (NBR) compounds Fitted to the inner surface of the steel frame, the steel frame is fixed in place by the seal groove in the outer ring of the bearing, and can protect the seal from solid contamination; the 5 layers of sealing lips have different designs to provide excellent sealing performance to deal with Different working conditions including dynamic misalignment; the sealing lip is a labyrinth type to prevent various pollutants from entering and grease leakage. Suitable for 800RPM/Min or less

FJ seal: used for Z&R outer spherical bearing ultra-high-speed products; suitable for low-noise environments, such as blowers, commercial fans, etc.;

After being specially treated by Viton, it is attached to the inner surface of the stamped steel sheet frame, and a non-contact structure stamped steel sheet is added to effectively prevent the entry of pollutants; it can run smoothly in an environment of up to 200°

F seal: used for Z&R insert bearing conventional products, two steel galvanized sheets are sandwiched with nitrile rubber (NBR) seal, the sealing lip is axially pre-tightened, and the outer steel galvanized sheet has a certain angle outward Inclined and extended to effectively protect the sealing lip from mechanical damage and particulate entry; this structure is suitable for occasions that require both high speed and low noise.

SF seal: The nitrile rubber (NBR) sealing lip is vulcanized and adhered to the inner surface of the stamped steel sheet frame. Through its non-contact steel sheet frame, the steel sheet frame is fixed in place by the sealing groove in the outer ring of the bearing. The shoulder of the ring forms a small gap; the steel retaining ring is installed on the shoulder of the inner ring by interference fit, which can significantly improve the sealing effect without increasing friction to prevent the seal from being affected by particle contamination


(Sealing ring material comparison)


(Polymer material type)


(Nitrile rubber)


(Silica gel)




(Material code)





(Temperature range)

-40F ~250F


-80F ~400F


-40F ~400F



(Oil resistant)





(Acid resistant)





(Alkali resistance)





(Water resistant)





(Heat resistant)





(Cold resistant)





(Wear-resistant )






(Ozone resistant)





E=优秀(  Excellent) G=好 (Good)  F=普通(ordinary) X=不推荐(Not recommended)

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