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REL2 Series Triple Seal Bearing (for Ball Bearing Units with Eccentric Locking Collar)

REL2...LLJ / NSK (Official website)

Triple seal bearing for bearing units with an eccentric locking collar. High dust and waterproof performance with long service life.

Last verified: (date the content was verified against the source document)

Specifications

Inner diameter d 20~75 mm
Operating Temperature Range -15~100 ℃
Allowable dn value 36000
Basic dynamic load rating Cr 12800~66000 N
Basic static load rating Cor 6650~49500 N
Mass 0.22~2.66 kg
Standard lubricant Lithium-based mineral oil grease

How to choose Insert Bearings

Points to check when selecting, with the values for this product (REL2 Series Triple Seal Bearing (for Ball Bearing Units with Eccentric Locking Collar)).

  1. 1. Select the bore to suit the shaft diameter

    This product: Inner diameter d 20~75 mm

    The bore d is the shaft diameter to be applied, and listed products range from 12 to 90 mm. Set screw and eccentric collar types secure the bearing through clearance with the shaft, so the shaft tolerance should also be checked. For standard-dimension products such as JIS UC-type, compatibility with existing units should be checked to make replacement easier.

  2. 2. Estimate life using the basic dynamic load rating

    This product: Basic dynamic load rating Cr 12800~66000 N

    The basic dynamic load rating Cr is the reference for rolling fatigue life calculation, and listed products range from 12800 to 96000 N. Calculate the rated life from the actual load and rotational speed, and confirm whether it meets the required operating time. If shock or vibration is present, apply a load factor.

  3. 3. Check the static load rating for stationary or low-speed operation

    This product: Basic static load rating Cor 6650~49500 N

    The basic static load rating Cor is the reference for the permissible load during standstill or extremely low-speed operation, and listed products range from 6650 to 71500 N. In applications where large loads or shocks are applied while stopped, confirm that an adequate static safety factor is secured to avoid noise and vibration caused by indentation.

  4. 4. Do not exceed the maximum rotational speed

    The limiting speed and the permissible dn value (bore multiplied by rotational speed) define the upper limit of usable speed. Contact-type multi-seal products tend to generate heat from seal friction and therefore tend to have lower limits. Confirm that the actual maximum rotational speed has sufficient margin.

  5. 5. Select lubrication and specifications suited to temperature

    Standard grease-packed products should be used within the specified operating temperature range. High-temperature types with maximum operating temperatures of 250 to 350 °C are available, and some graphite-lubricated types require no regreasing. Also check in advance whether food-grade compatibility is available and whether the type requires a break-in run.

  6. 6. Consider fixing method and seals for dust and moisture

    In environments with heavy dust or muddy water, such as steelmaking, waste treatment, and water and sewage systems, triple-lip seal types are effective for retaining grease and preventing foreign matter ingress. The mounting method differs depending on whether the shaft is secured with set screws or eccentric locking collars, so select the fixing method together with measures against loosening caused by vibration.

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

About Insert Bearings and all products

Description

Ball bearing for bearing units that is fixed to the shaft by an eccentric locking collar. Equipped with a 3-lip triple seal to suppress internal contamination in environments with much muddy water and dust. Uses the same seal structure as the UC2 series. Bore diameter 20 to 75 mm. Operating temperature -15 to 100°C, allowable dn value 36,000.

Features

  • 3-lip triple seal provides high dust and waterproof performance
  • Shaft fixing by eccentric locking collar
  • Extends maintenance intervals and contributes to improved equipment operating rate

Applications

  • Steel manufacturing
  • Casting
  • Waste treatment
  • Water and sewage treatment
  • Food processing
  • Construction machinery
  • Conveying equipment
  • Agricultural machinery
  • Textile and dyeing machinery

FAQ

Q. What are the bore diameter and operating temperature range of the REL2 Series Triple Seal Bearing (eccentric locking collar type)?
A. Bore diameter d is 20 to 75 mm, and the operating temperature range is -15 to 100°C.
Q. What are the allowable dn value and standard lubricant for REL2...LLJ?
A. The allowable dn value is 36,000, and the standard lubricant is lithium-based mineral oil grease.
Q. What environments is REL2...LLJ suitable for?
A. It is equipped with a 3-lip triple seal that suppresses internal contamination even in environments with much muddy water and dust. It offers high dust and waterproof performance and contributes to improved equipment operating rate by extending maintenance intervals.
Q. What are the basic dynamic load rating and basic static load rating of REL2...LLJ?
A. Basic dynamic load rating Cr is 12,800 to 66,000 N, and basic static load rating Cor is 6,650 to 49,500 N.
Q. In which machinery fields is REL2...LLJ used?
A. It is used in steel manufacturing, casting, waste treatment, water and sewage treatment, food processing, construction machinery, conveying equipment, agricultural machinery, and textile and dyeing machinery.

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

Source documents

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