Radial Shaft Seal HMS5 and HMSA10

Specifications

How to choose Oil Seals

Points to check when selecting, with the values for this product (Radial Shaft Seal HMS5 and HMSA10).

1. 1. Match shaft diameter and housing bore

   This product: Shaft diameter d 250 or less mm

   Select shaft diameter d and outer diameter D by nominal dimensions to suit the mating shaft and housing bore. Listed shaft diameters range widely from 6 to 3530 mm. Some standard types are designed assuming shaft tolerance h8 and housing bore tolerance H7/H8. Deviation from fit tolerances can cause leakage or seal dislodgement.

2. 2. Check width fits the installation space

   Confirm that width b fits within the axial installation space. Listed products are 5 to 30 mm. For large types, cross-section width, groove width, and presence of spacers are also part of the dimensional requirements, so verify against the housing groove dimensions.

3. 3. Select lip material suited to fluid and temperature

   This product: Lip Material Acrylonitrile butadiene rubber (NBR), Shore A hardness 75

   Lip material governs oil resistance and heat resistance. Nitrile rubber is a general-purpose material for mineral oils, acrylic and fluororubber suit the high-temperature range, and silicone readily covers low to high temperatures. PTFE lips are suitable for chemicals and high temperatures, and food-hygiene-compliant materials are available for food machinery.

4. 4. Allow margin in operating temperature range

   This product: Operating Temperature Range -40～+100 °C

   Confirm that the continuous operating temperature range includes the running oil temperature. Temporary temperature rises, such as at startup, are judged by the short-term maximum temperature (120 °C in one listed example). However, if the normal operating temperature is close to the upper limit, rubber hardening and lip wear will accelerate.

5. 5. Verify shaft surface speed is within limit

   This product: Maximum Peripheral Speed Up to 14 m/s

   Surface speed is the lip sliding speed calculated from shaft diameter and rotational speed. The listed maximum surface speeds are 5 to 20 m/s, and exceeding them causes lip deterioration from frictional heat. Even at the same rotational speed, surface speed increases with larger shaft diameter, so check this particularly for large-diameter shafts.

6. 6. Confirm maximum sealing pressure limit

   This product: Maximum Operating Pressure Max. 0.03 MPa

   Standard oil seals are intended for low-pressure use. Listed maximum operating pressures vary greatly by type, from 0.03 to 15 MPa, so select a pressure-resistant type for applications with internal pressure. Under pressure the lip is pressed strongly against the shaft, making heat generation more likely.

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

About Oil Seals and all products

Description

Series designed in accordance with ISO 6194-1 and DIN 3760. The spring-loaded sealing lip provides high conformity to dynamic eccentricity and maintains sealing performance after lip wear. Nitrile rubber (RG) offers excellent aging resistance, compatibility with synthetic oils, pumping performance, and wear resistance. Fluoroelastomer (V) specification supports high-temperature ranges. The HMSA10 auxiliary lip protects the main lip.

FAQ

Q. What are the usable shaft diameter, peripheral speed, and pressure conditions for HMS5 and HMSA10?

A. Shaft diameter d is 250 mm or less, maximum peripheral speed is 14 m/s, and maximum operating pressure is 0.03 MPa.

Q. What is the operating temperature range and short-term maximum temperature for HMS5 and HMSA10?

A. The operating temperature range is -40 to +100 °C, and the short-term maximum temperature is 120 °C.

Q. What are the materials and recommended shaft hardness for HMS5 and HMSA10?

A. The outer metal case material is mild steel, and the lip material is acrylonitrile butadiene rubber (nitrile rubber) with Shore A hardness of 75. The recommended shaft hardness is minimum 45 HRC.

Q. What role does the auxiliary lip of HMSA10 play?

A. The auxiliary lip protects the main lip.

Q. Which standards do HMS5 and HMSA10 comply with, and which specification should be selected for high-temperature applications?

A. They are designed in accordance with ISO 6194-1 and DIN 3760. For high-temperature applications, the fluoroelastomer (V) specification is available.

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

Source documents

• Catalog ラジアルシャフトシール HMS5およびHMSA10 10 pages Open page 2
  Found on: https://azuma-eg.com/catalogue/