Product Overview

The NMT HJ 205 EC is an L-shaped angle ring (thrust collar), a dedicated accessory for cylindrical roller bearings. This angle ring is not a complete bearing but a separate component used in conjunction with NU or NJ type single-row cylindrical roller bearings to provide axial location for the shaft.

 

The product has a bore of 25 mm, an outer diameter of 34.7 mm, and a width of 6 mm. Manufactured from carbon chromium bearing steel with hardening and grinding, it weighs only 15 g. It belongs to the SKF HJ series angle ring product line, with NMT (Japan Enmutī) offering a fully compatible alternative that meets original manufacturer standards.

 

Model Code Decoding – Understanding NMT HJ 205 EC

Code Meaning

HJ Angle ring (L-shaped thrust collar) – axial location accessory for cylindrical roller bearings

205 Size series designation – compatible with bearings of 25 mm bore

EC Design code – indicates optimized internal design for higher load capacity

Core Value: The HJ 205 EC angle ring is a critical locating component in cylindrical roller bearing systems. When standard NJ or NUP type bearings cannot meet specific installation requirements, this angle ring can be used with NU type bearings to provide axial location in one direction, or with NJ type bearings to provide axial location in both directions. Manufactured from high-quality carbon chromium bearing steel with precision heat treatment and grinding, the NMT version ensures perfect fit and long-term reliable operation with cylindrical roller bearings.

 

Core Performance Advantages

1. Axial Location – Solving the Axial Guidance Problem of Cylindrical Roller Bearings

NU type cylindrical roller bearings have inner rings without flanges and cannot provide axial location on their own. The HJ 205 EC angle ring provides axial location in one direction when used with NU bearings. When used with NJ bearings, it provides axial location in both directions.

 

2. Simplified Design and Installation – Replacing Complex Locating Solutions

Using an angle ring can simplify bearing arrangement design and installation, particularly in the following situations:

 

When NJ or NUP type bearings are not available in the required size range

 

When the shortened inner ring seating surface of NUP bearings is insufficient for high loads

 

When simplification of bearing arrangement design and disassembly is required

 

3. High Load Capacity – Extended Inner Ring Seating Surface

The angle ring provides an extended inner ring seating surface for heavily loaded bearings, effectively improving load distribution.

 

4. Precision Manufacturing – Ensuring Fitting Accuracy

Manufactured from carbon chromium bearing steel with hardening and grinding, the angle ring ensures precise fit with the bearing inner ring.

 

5. Lightweight Design – Only 15 Grams

The product weighs only 15 g, adding minimal burden to rotating assemblies.

 

6. Clear Performance Specifications

 

Parameter Value

Bore d 25 mm

Outer Diameter D 34.7 mm

Width B 6 mm

Width on Inner Ring Side B1 3 mm

Radial Chamfer r3,4 min. 0.6 mm

Material Carbon Chromium Bearing Steel

Heat Treatment Hardened and Ground

Weight 0.015 kg (15 g)

Companion Bearing Selection Guide

The HJ 205 EC angle ring is typically used with the following types of cylindrical roller bearings:

 

With NU type bearings:

 

NU 205 EC series cylindrical roller bearings

 

Provides unidirectional axial location

 

With NJ type bearings:

 

NJ 205 EC series cylindrical roller bearings

 

Provides bidirectional axial location

 

When used with bearings such as NU 205 ECML / NJ 205 ECP, the combined assembly dimensions are: bore 25 mm, outer diameter 52 mm, width 15 mm. Please select the appropriate companion bearing based on your specific application requirements.

 

Important Installation Notes

✅ This angle ring is a separate component and must be installed together with NU or NJ type cylindrical roller bearings.

 

✅ Ensure the angle ring bore (25 mm) provides a tight fit with the bearing inner ring.

 

✅ The angle ring width (6 mm) should match the bearing inner ring width.

 

⚠️ This angle ring is not a direct substitute for bearings with integral flanges (such as NUP type) – selection should be based on specific design requirements.

 

⚠️ Pay attention to the directionality of the angle ring during installation – the L-shaped structure should face the direction requiring axial location.

 

✅ Installation in a clean environment is recommended to prevent contaminant ingress that could affect performance.

 

NMT Quality Commitment

Japan NMT (Enmutī) has deep expertise in the precision bearing industry, with breakthroughs in material purification, process refinement, scenario customization, and intelligent upgrading, transforming precision bearing accessories into core solutions addressing pain points across multiple industries. The NMT HJ 205 EC angle ring is manufactured to strict Japanese quality standards – from material selection (high-purity carbon chromium bearing steel) to heat treatment and grinding processes. The combination of precision angle ring design, high-quality bearing steel, precision grinding, and lightweight construction makes this product the flagship offering in the NMT cylindrical roller bearing accessories series – delivering the perfect balance of precise positioning and reliable durability.

 

Choose NMT HJ 205 EC for:

 

✅ Precise axial location – solving the axial guidance problem of NU/NJ bearings

 

✅ High-quality bearing steel – hardened and ground for durability

 

✅ Lightweight design – only 15 g

 

✅ Easy installation – simplifying bearing arrangement design

 

✅ High load capacity – extending inner ring seating surface

 

✅ Japanese precision manufacturing quality