Grinding head is a kind of small handle grinding tools, used in electric mills, hanging mills, hand electric drills. There are many kinds of diamond grinding head, ceramic grinding head, rubber grinding head, diamond grinding head, emery cloth grinding head.
Ceramic grinding head: grain size sand (generally brown corundum, white corundum, chrome corundum, silicon carbide) sintered by ceramic binder, with a metal handle in the center. Mainly grinding all kinds of metal, for grinding the inner wall of aperture, mold correction. Rubber grinding head: fine sand is synthesized by rubber binder for the polishing of mould
Diamond grinding head: A kind of stone material, ceramic materials and other non-metallic materials of grinding tools, especially involving a with diamond alloy grinding tools for grinding body, it includes substrate and a mill body, in which several mill body clearance to fixed to the substrate, the grinding surface of the grinding head grinding body also set a clearance, among them, the substrate is best by a certain toughness of adhesive materials, The grinding body is preferably made of diamond alloy material. The utility model has the advantages of high grinding performance, simple manufacturing and low cost, high grinding quality and being suitable for large-scale grinding Grinding Heads,Cbn Sharpening Stone,Brazing Diamond Drilling Tool,Flexible Polyurethane Grinding Head Henan Jinlun Superhard Material Co., Ltd , https://www.jinlungrindingtools.com
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Detailed protection of tapered roller bearings Detailed analysis of the protection of tapered roller bearings
(1) Most new wheels have new bearing outer races. If it is necessary to replace the old ones; find the gaps that can be close to the thick side of the outer race. Use copper rods to avoid damage. Something completely puts the new seat in place. Most bearings and oil seal assemblies have a flanged device with a flange. The selected device should not exert too much force on the work surface of the race. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
(2) Mount the inner bearing, oil seal and hub assembly or hub, brake drum assembly on the steering knuckle; then install the outer wheel bearing on the steering knuckle; then install the quenching washer with the tab; Upper shaft nut.
(3) Hygiene is a work that needs to be done. There are two approved methods that can be used for sanitary bearings: Pinch a new smooth grease into the bearing or remove the bearing with a solution. If it is a new smooth grease kneaded into Bearing; pay attention to the bearing can not leave any contaminants; if not; repeat the new smooth grease into the bearing. If the solution is used to remove the bearing; remember. Fortunately, the bearing needs to be properly smoothed and preloaded before use; put the bearing on a clean rag and dry it. If it is urgently used; dry it with dry compressed air; do not use the hammer Use a tire nut; unless the tire nut is ready to be replaced. This may deform the cone of the tire nut; and it will not reach the required tightening force of the wheel under regular torque. The real risk is the thread The strength will be damaged. Use the nut with a flat washer; put it into the bearing assembly and disassembly after use. Read the centering ring of this bearing carefully; see if there is a "step". Centering ring The inner diameter side faces outward; the small side In; and the hub of many steps fit technician when first installed this bearing all make mistakes;. And had to spend money to buy one but can not be rotated.
(4) Rotate the shaft nut 1/6 to 1/4 turn; align the opening on the nut with the split pin hole on the shaft; then rotate the hub assembly again. If the nut is not turned back; The bearing will be severely damaged in the early stage due to overheating and excessive friction. For most models, the end face clearance should be 0. 025 ~ 0. 178mm wheel bearings are the primary force accepted during operation. The weight of the vehicle, the load, the road condition, the speed of the vehicle and the operation are related. The force of the (middle) level effect on the axle is called the axial load. The force of the straight effect on the axle is called the radial load. (Right) The induction vector of all forces can be It comes down to the total (inductive) load.
(5) After determining that the inner bearing abuts against the root of the steering knuckle; hand-tighten the shaft nut. Turn the hub nut while turning the hub assembly; to ensure that the orientation of each tapered roller is normal.
(6) Use high-quality smooth grease that meets or exceeds NLGI #2 and ASTM D 4950 specifications. (Translator's Note: NLGI is the American Smooth Fat Society; ASTM is the American Society for Data Experiments. These two arrangements have together formulated a smooth car protection protection. Grease classification and specification. GB/T5671-95 is China's automotive general lithium-based smooth grease specification; this specification refers to the Japanese JISK2220-84 specification). Of course; the oil seal is to be replaced; to determine the orientation of the oil seal and according to the rules Depth device (usually flush with the exterior of the device; but some rules should be deeper). The inner lip of the oil seal should be smoothed with grease; so that it can rotate with the hub. It is necessary to leave a certain part in the bearing cavity. Space; in this case; can retain the remaining smooth grease that is pulled out when the bearing rotates. Many manufacturers have suggested that only 1/3 to 1/2 of the smooth grease can be modified in the bearing cavity; beyond this amount, it is possible to make the bearing The operating temperature rises; then it causes early damage to the bearing.
(7) Install the dust cap on the shaft head. Damaged or deformed dust cap will cause water or impurities to enter the working area of ​​the bearing; therefore, if the dust cap is damaged or deformed, it should be replaced. Most technicians will be in the dustproof Wipe off smooth grease; this will absorb any impurities and make the dust cap more sealed. Say it again; don't wipe too much smooth grease; at least half of the space in the dust cap.
(8) Place the crown-shaped piece on the shaft nut. Many shaft heads have two straight pairs of perforations; align the notch of the crown-shaped piece with a hole in it and puncture the cotter pin. Remember: the opening will be Pin bend; in case it falls out.
(9) Gradually tighten the shaft nut with a manual object until the hub assembly has no axial clearance on the knuckle; this indicates that all parts are in the correct orientation. Next, the preload of the bearing can be adjusted.
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Source: China Bearing Network Time: 2014-03-29