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Cam Follower (Eccentric Shaft, with Tapped Hole)

偏心軸カムフォロア（KRU形・KRVU形・NUKRU形） / NTN Corporation (Official website) / Listed on page 59 of the document

Cam follower with an eccentric shaft that simplifies adjustment of the mounting position, and a tapped hole for grease lubrication.

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Cam Follower (Eccentric Shaft, with Tapped Hole) on page 59 of NTN Corporation "ニードルローラベアリング ハンドブック"
Source: NTN Corporation「ニードルローラベアリング ハンドブック」page 59
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Specifications

Eccentricity 0.25～1.0 mm

How to choose Cam Followers

Points to check when selecting, with the values for this product (Cam Follower (Eccentric Shaft, with Tapped Hole)).

  1. 1. Select outer diameter to suit surface and load

    The 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.

  2. 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.

  3. 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.

  4. 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.

  5. 5. Select eccentric type when position adjustment is required

    This product: Eccentricity 0.25～1.0 mm

    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.

  6. 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.

About Cam Followers and all products

Description

Cam follower with an eccentric shaft that simplifies adjustment of the mounting position. A grease nipple can be fitted to the tapped hole in the stud, and it can also be used with centralized piping. Available in three types: needle roller with cage (KRU type), needle roller without cage (KRVU type), and double-row cylindrical roller (NUKRU type).

Features

  • Eccentric shaft allows easy adjustment of mounting position
  • Tapped hole in stud enables grease lubrication
  • Compatible with both slotted and hexagonal socket drive
  • Available with spherical outer ring and cylindrical outer ring

Applications

  • Machine tools
  • Packaging machines
  • Industrial robots
  • Medical equipment
  • Multi-level parking systems
  • Conveyor equipment such as automated warehouse systems

FAQ

Q. How can the mounting position of eccentric shaft cam followers (KRU, KRVU, and NUKRU types) be adjusted?
A. An eccentric shaft is used, which makes adjustment of the mounting position easy. The eccentric amount is 0.25 to 1.0 mm.
Q. Does the cam follower (eccentric shaft, with tapped hole) support grease lubrication?
A. The stud has a tapped hole to which a grease nipple can be attached. It can also be used with centralized piping.
Q. What types are available for eccentric shaft cam followers (KRU, KRVU, and NUKRU types)?
A. There are three types: needle roller with cage (KRU type), needle roller without cage (KRVU type), and double-row cylindrical roller (NUKRU type).
Q. What are the applications of the cam follower (eccentric shaft, with tapped hole)?
A. It is used in machine tools, packaging machines, industrial robots, medical equipment, multi-level parking systems, and conveyor equipment such as automated warehouse systems.
Q. What tool compatibility and outer ring shapes does the cam follower (eccentric shaft, with tapped hole) have?
A. It is compatible with both slotted and hexagonal socket drive. It is available with a spherical outer ring and a cylindrical outer ring.

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

Source documents

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