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Oil Seal

HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA / JTEKT Corporation (Official website) / Listed on page 1 of the document

Oil seal that prevents leakage of oil and other sealed media from the rotating part of a shaft and intrusion of external dust. Covers all types and dimension series conforming to ISO, JIS, and JASO standards.

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Oil Seal on page 1 of JTEKT Corporation "オイルシール ＆ Oリング"
Source: JTEKT Corporation「オイルシール ＆ Oリング」page 1
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Specifications

Shaft diameter d1 6～75 mm
Outer diameter D 14～75 mm

How to choose Oil Seals

Points to check when selecting, with the values for this product (Oil Seal).

  1. 1. Match shaft diameter and housing bore

    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

    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

    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

    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

    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

The line-contact lip structure and rubber material with excellent self-lubricating properties achieve low heat generation and long service life even at high peripheral speeds. Available in various types including spring-loaded, outer rubber-covered, outer metal-cased, and reinforcing-ring types, and dust protection is also possible with an auxiliary lip. The hydrodynamic rib delivers high sealing performance with low torque.

Features

  • High sealing performance with line-contact lip design
  • Low heat generation and long service life from rubber material with excellent self-lubricating properties
  • Low torque and high sealing performance with hydrodynamic rib
  • Lightweight and compact, contributing to resource saving
  • Dust intrusion prevention with auxiliary lip

Applications

  • Automobiles
  • Motorcycles
  • Rolling mills
  • Railway vehicles
  • Geared motors
  • Hydraulic motors

FAQ

Q. What are the shaft diameter d1 and outer diameter D ranges for Oil Seal HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA?
A. Shaft diameter d1 is 6 to 75 mm, and outer diameter D is 14 to 75 mm.
Q. Does Oil Seal HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA support dust protection?
A. Yes, dust protection is possible with an auxiliary lip. The auxiliary lip provides protection against dust intrusion.
Q. What are the features of Oil Seal HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA in terms of high peripheral speed and torque?
A. The line-contact lip structure and rubber material with excellent self-lubricating properties achieve low heat generation and long service life even at high peripheral speeds. The hydrodynamic rib delivers high sealing performance with low torque.
Q. What applications is Oil Seal HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA used for?
A. It is used in automobiles, motorcycles, rolling mills, railway vehicles, geared motors, hydraulic motors, and others.
Q. What types are available for Oil Seal HM / HMA / HMS / HMSA / MH / MHA / MHS / MHSA?
A. Various types are available, including spring-loaded, outer rubber-covered, outer metal-cased, and reinforcing-ring types. All types and dimension series conforming to ISO, JIS, and JASO standards are included.

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

Source documents

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