Cage and seal materials
CAGES
| W : ONE-PIECE STEEL CROWN TYPE | J : TWO-PIECES STEEL RIBBON TYPE | RJ : TWO-PIECES STEEL RIVET TYPE | TW : ONE-PIECE NYLON CROWN TYPE |
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| The stainless steel pressed cage is inner ring guided. It shows excellent performance in low torque, low speed applications. | 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. | 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. | Moulded nylon cage. Reduces the fluctuation in running torque. Suitable for high speeds. Guided by the rolling elements. Nylon cage operating temperature range: from -30° to + 120°C |
SHIELD, SEAL
| ZZ : PRESSED STEEL SHIELD | ZZS : STEEL SHIELD WITH SNAP RING | TTS : TEFLON SEAL WITH SNAP RING | 2RS : CONTACT RUBBER SEAL | 2RU : NON-CONTACT RUBBER SEAL |
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| Non-contact shield pressed into outer ring. Very little grease leakage and low ingress of contaminants. | Non-contact shield retained in outer ring. Low ingress of contaminants. Mainly used for smaller or narrower bearings. | 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 accomodate internal pressure changes. Teflon seal operating temperature range: from -100° to +260°C | Rubber seal fitted into outer ring. Light contact with inner ring, retains grease and prevents ingress of external contaminants. NBR seal operating temperature range: from -40° to +120°C. FKM(VITON) seal operating temperature range: from -30° to +230°C. |
Non-contact rubber seal fitted into outer ring, still provides effective sealing. NBR seal operating temperature range: from -40° to +120°C. FKM (VITON) seal operating temperature range: from -50° to +230°C |