Bearee™ M Liner Bearing (ML Type)

Specifications

How to choose Plain Bearings

Points to check when selecting, with the values for this product (Bearee™ M Liner Bearing (ML Type)).

1. 1. Select dimensions that fit the shaft diameter and housing bore

   This product: Inner diameter d 3～70 mm

   Match the inside diameter d to the shaft diameter and the outside diameter D to the housing bore diameter. Listed products have inside diameters of 3 to 70 mm and outside diameters of 5 to 80 mm. When press-fitting, allow for the bearing shrinking during installation, which reduces the inside diameter. Also check the shaft and housing tolerances recommended by the manufacturer.

2. 2. Verify bearing pressure and speed using the PV value

   Confirm that the PV value, which is the product of bearing pressure (load divided by projected area) and sliding speed, does not exceed the limiting PV value. The limiting PV value of listed products is 400 MPa·m/min. The individual limits for bearing pressure alone (3 to 10 MPa) and for sliding speed alone (150 m/min) must also be satisfied.

3. 3. Determine the length according to the load

   This product: Length L 3～60 mm

   Increasing the length L increases the projected area and lowers the bearing pressure. However, if the length is too great, shaft deflection tends to concentrate the load at the ends, causing edge loading. Listed products have lengths of 3 to 60 mm, so select a length that keeps the bearing pressure within the limit.

4. 4. Select a material suited to the operating environment

   For underwater or chemical-liquid use, choose a material with chemical resistance and wear resistance in liquid. Where static electricity is a concern, choose a conductive material. Wear of the mating material also varies with the material and hardness of the mating shaft. If antistatic performance is required, also check the volume resistivity.

5. 5. Check temperature and operating clearance

   This product: Operating clearance (minimum) 0.095～0.195 mm

   Resin bearings expand as temperature rises, which reduces clearance. In addition to the maximum operating temperature (300 to 350 °C) and continuous operating temperature (260 °C), maintain the recommended minimum operating clearance (0.095 to 0.195 mm).

6. 6. Match the lubrication method to the maintenance conditions

   Whether a bearing can run without lubrication, or requires oil-impregnated or external lubrication, affects maintenance effort and the risk of contamination in the surroundings. Greaseless types are suitable for food machinery and clean environments. For use in vacuum, also check the usable vacuum level and low outgassing performance.

This guide was written by AI based on the listed products' documents and specification items.

About Plain Bearings and all products

Description

The ML type is a cylindrical resin bearing with a slit, with bore, outside diameter and length specified for each model number. The minimum and maximum operating clearance for installation in an H7 carbide housing, and the length tolerance (0/-0.25 mm), are listed in the data sheet.

FAQ

Q. What are the range of bore diameter, outside diameter and length for the Bearee™ M Liner Bearing (ML Type)?

A. Bore diameter d is 3 to 70 mm, outside diameter D is 5 to 75 mm, and length L is 3 to 60 mm.

Q. What is the operating clearance when mounting the ML Type M Liner Bearing in an H7 carbide housing?

A. The minimum operating clearance is 0.095 to 0.195 mm. The data sheet also lists a maximum value, but the range of values is not shown in this information.

Q. How is the length tolerance of the ML Type M Liner Bearing specified?

A. The length tolerance is 0/-0.25 mm.

Q. What is the structure of the ML Type M Liner Bearing, and what are the advantages for installation?

A. It is a cylindrical resin bearing with a slit, and a plain bearing installed between shaft and housing. The slit makes installation easy.

Written by AI based on the content of the source documents.

Source documents

• Catalog エンジニアリング・プラスチック製しゅう動部品 ベアリー™ 26 pages Open page 16
  Found on: https://www.ntn.co.jp/japan/products/catalog/ja/2203/index.html