Type & Characteristics of Cages, Shields and Seals
Data downloadable in PDF format:
W : ONE-PIECE STEEL CROWN TYPE
The stainless steel pressed cage is inner ring guided. It shows excellent performance in low torque, low speed applications.
J : TWO-PIECE STEEL RIBBON TYPE
Consists of two mating steel pressings, the cover side and the finger side.
Usually guided by the rolling elements and designed to reduce frictional torque.
RJ : TWO-PIECE STEEL RIVET TYPE
The RJ type cage is suitable for larger bearings with a high load carrying capacity. The two pieces are riveted together and are strong enough to withstand higher levels of vibration and acceleration. The cage is guided by the balls and reduces frictional torque
TW : ONE-PIECE NYLON CROWN TYPE
Moulded nylon cage. Reduces the fluctuation in running torque. Suitable for high speeds.
Guided by the rolling elements.
V : FULL COMPLEMENT OF BALLS
This type of bearing has no cage but maximum possible number of balls. Due to the fact that the inner and outer ring have a filling slot, the axial load carrying capacity of this bearing type is low. This type of bearing is suitable for high radial load, low speed applications.
ZZ : PRESSED STEEL SHIELD
Non-contact shield pressed into outer ring. Very little grease leakage and low ingress of contaminants.
ZZS : STEEL SHIELD WITH SNAP RING
Non-contact shield retained in outer ring. Low ingress of contaminants. Mainly used for smaller or narrower bearings.
TTS : TEFLON SEAL WITH SNAP RING
Teflon seal reinforced with glass fibre is retained in outer ring by snap ring. Low ingress of contaminants. Mainly used for smaller or narrower bearings. Seal can flex to accommodate internal pressure changes.
2RS : CONTACT RUBBER SEAL
Rubber seal fitted into outer ring. Light contact with inner ring, retains grease and prevents ingress of external contaminants.
2RU : NON-CONTACT RUBBER SEAL
Non-contact rubber seal fitted into outer ring, still provides effective sealing.