Fixed sleeve

Product name: fixed sleeve

The function of the drill sleeve is mainly used to determine the axis position of the drill bit, reamer, reamer and other fixed-size tools. The structure and size of the drill sleeve have been standardized. According to the characteristics of use, the drill sleeve has four types: fixed drill sleeve, replaceable drill sleeve, quick-change drill sleeve and special drill sleeve. In addition, the fixed drill sleeve can use the fixed machining mode, and the interference fit is used to insert the drill sleeve into the drill template, so that it can play the role of fixing and positioning the tool, and can guide the tool to process the tool. Shenzhen Qixingyuan Machinery Equipment Co., Ltd. is mainly engaged in various types of air knives, circuit boards, and electroplating equipment accessories.

The shaft sleeve is a cylindrical mechanical part sleeved on the rotating shaft and is a component of the sliding bearing. Generally speaking, the shaft sleeve and the bearing seat adopt an interference fit, and the shaft adopts a clearance fit. Shaft sleeve refers to the sleeve on the propeller shaft or stern shaft. The bearing is a component that fixes and reduces the friction coefficient of the load during the mechanical transmission process.

The similarity between the sleeve and the bearing is that both bear the load of the shaft. The difference between the two is that the shaft sleeve is an integral structure, and the shaft and the shaft sleeve move relative to each other when rotating; while the bearing is a split type, the inner and outer rings of the bearing itself move relative to each other when rotating. But in essence, the sleeve is actually a kind of sliding bearing.

The bearing bush is equivalent to the outer ring of the sliding bearing. The bushing is integral and moves relative to the shaft, while some of the bearing bushes are split and rotate relative to the shaft.

Bushing inspection standard:

1. Appearance quality The surface of the sample should be free of bubbles, burrs, deformation, uniform material, and no irritating odor.

2. Size

(1) Testing related dimensions with vernier calipers should meet the requirements of related technologies and drawings.

(2) After the shaft sleeve is matched with the rotating shaft, the rotor is vertically downward, and the shaft sleeve will not slide freely under the action of its own weight.

3. Heat resistance and aging resistance test

(1) After the sample is subjected to the 125℃/1h ball pressure test, the indentation should be ≤2mm, and there is no deformation by visual inspection.

(2) After putting the sample in the oven at 120°C/96 hours, visually check that the shaft sleeve has no embrittlement or deformation.

4. Combustion resistance test

The flame retardant grade is VW-1, and it should be extinguished within 15S after burning with alcohol lamp for 15S.