JMC Jalman Precision Track Rollers

Jalman Precision (JMC) is professionally conducting a manufacturing of state-of-the-art products such as rod ends, spherical plains, ball joints & track roller bearings by using independently-developed technology, further proceeding to produce rare kinds of bearings with globally competitiveness comprising price, quality, design, durability, etc. Jalman Precision Co., Ltd. manufactures two types of track roller bearings in general. One is stud type track roller and the other is yoke type track roller. JMC stud type track roller bearing is composed of stud that works as the shaft, roller and the needle that is located between anterior part of roller and stud to help smooth rotation during operation. Flange type shaft head and thrust fastening ring are non-removable type that guides the needle to move smoothly and guides the outer ring towards the axial direction. Bearing steel is used for most components including roller, needle, fastening ring and shaft (greater than CF 12). Generally, JMC stud type track rollers are non-separable bearings and are available in two types: cage type and filling type. For the cage type, the needle is splitted between the shaft and the roller and grease acts between the needle to smooth the needle's rolling and is suitable for high speed and medium load. On the other hand, a filling type full of needles without a cage is a non-separating type bearing which is subjected to low-speed rotation and high load and periodically refuelling. Stud head of JMC stud type track roller has hex wrench socket where you can supply grease to needle through the inlet. For products larger than CF12, you can also supply oil through screw part of the stud. Jalman Precision Co., Ltd. also supplies appropriate grease accessories such as special synthetic resin plugs for head hex wrench socket on the stud head, round plugs for covering hole of the stud thread and nipple. Yoke type track rollers manufactured and supplied by us include NART, NAST, NUTR, NK, NA49, SL and NJ. JMC yoke type track rollers are composed of inner ring, outer ring, two fastening rings tightly fixed to the inner ring, cage and needle or needle only.For NUTR, two additional fixing cores are added and only filling type is available. Most components including inner and outer ring, fixing ring and needle are made of high carbon chromium bearing steel.Sealant type prevents lubrication oil leakage and is very suitable for preventing foreign body. Grease is supplied through oil filling hole on the inner ring. Especially, NAST series are separable track rollers where each part may be separated and is being used extensively among industry.