New Standard Cam Follower
新標準カムフォロア（KR/KRV） / NTN Corporation (Official website) / Listed on page 55 of the document
Cam follower with special heat treatment of rollers and high-performance grease that improve rolling fatigue life and low-temperature starting torque performance. Interchangeable with conventional products.
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Specifications
| Outer diameter D | 16～26 mm |
|---|---|
| Rolling fatigue life | 4 倍以上（従来比） |
How to choose Cam Followers
Points to check when selecting, with the values for this product (New Standard Cam Follower).
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1. Select outer diameter to suit surface and load
This product: Outer diameter D 16～26 mmThe outer diameter D is the basic dimension that determines the surface pressure on the mating contact surface and the required installation space. Listed products range from 16 to 52 mm. A larger outer diameter lowers the surface pressure and reduces wear on the mating surface. Determine it by checking against the dimensions of the cam groove or rail.
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2. Verify life with dynamic load rating
The basic dynamic load rating Cr is the reference value for life calculation. Listed products range from 9 to 78 kN. Even with the same outer diameter, full-complement and high-load types have a higher Cr. Select by calculating the required life from the actual load and rotational speed. If shock loads are present, also check the basic static load rating C0r.
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3. Choose between cylindrical and crowned outer ring
A crowned (spherical) outer ring reduces edge loading caused by mounting errors and suppresses stress concentration at the outer ring ends. A cylindrical outer ring has a longer contact length and is a shape that easily lowers the surface pressure on the mating surface. Select according to the accuracy of the mating surface and the mounting accuracy.
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4. Confirm mounting with stud diameter and thread
The stud diameter d and thread designation determine the machining dimensions of the mounting hole and the tightening torque. If the threaded portion is too long, it may not pass through the frame, so check the frame plate thickness and nut position together with the overall length B.
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5. Select eccentric type when position adjustment is required
With the eccentric stud type, turning the stud shifts the roller position, so the contact and clearance of multiple rollers can be adjusted after assembly. The eccentricity of listed products ranges from 0.25 to 1 mm. Confirm that the required adjustment allowance falls within this range.
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6. Use sealed type in dust and cutting fluid environments
In environments exposed to dust, cutting fluid, or moisture, selecting a sealed type such as 2RS helps suppress foreign matter ingress and grease leakage. Unsealed types have lower rotational resistance, but they require a maintenance plan such as periodic lubrication through the grease hole.
This guide was written by AI based on the listed products' documents and specification items.
Description
Cam follower series with outer diameter φ16 to 26. Rollers are crowned and specially heat-treated, improving rolling fatigue life by more than 4 times compared with conventional products. High-performance grease reduces starting torque at low temperatures by approximately 20% and improves wear resistance. Mounting and lubrication methods are the same as conventional products, allowing easy replacement.
Features
- Rolling fatigue life more than 4 times that of conventional products
- Approximately 20% reduction in low-temperature starting torque
- Interchangeable with conventional products
- Available in both cage-equipped and full-roller types
Applications
- Cam mechanisms in industrial machinery
FAQ
- Q. How much has the rolling fatigue life of the New Standard Cam Follower (KR/KRV) improved compared with conventional products?
- A. Rollers are crowned and specially heat-treated, improving rolling fatigue life by more than 4 times compared with conventional products.
- Q. What are the features of the New Standard Cam Follower (KR/KRV) regarding starting torque at low temperatures?
- A. High-performance grease reduces starting torque at low temperatures by approximately 20%. Wear resistance is also improved.
- Q. Can the New Standard Cam Follower (KR/KRV) be used as a replacement for conventional products?
- A. Yes, it is interchangeable with conventional products. Mounting and lubrication methods are the same as conventional products, allowing easy replacement.
- Q. What outer diameters and types are available for the New Standard Cam Follower (KR/KRV)?
- A. The outer diameter D ranges from 16 to 26 mm. Both cage-equipped and full-roller types are available.
Written by AI based on the content of the source documents.
Source documents
- Catalog ニードルローラベアリング ハンドブック 80 pages Open page 55
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