IKO CFE20VBUU Eccentric Cam Follower, Hex Hole, Full Complement, Sealed, Cylindrical Outer Ring, M20 thread

The IKO CFE20VBUU is an eccentric cam follower with a hexagon hole in the stud head, full complement needle rollers, sealed type construction and a cylindrical outer ring. It has an M20 x 1.5 thread (collar outside diameter 27 mm, eccentricity 0.8 mm), a 52 mm outer ring and an outer ring width of 24 mm. Basic dynamic load rating C is 33,200 N and static load rating C0 is 64,500 N.

The CFE series is the eccentric type: an eccentric collar on the stud lets you turn the stud to set the outer ring position and spread the load evenly across the outer ring surface, with an eccentricity of 0.4 to 1.5 mm across the range. A cam follower is a bearing with a stud, with needle rollers inside a thick-walled outer ring. The outer ring rotates and runs directly on the mating track (cam guide surface), so cam followers suit cam mechanisms and linear motions and are used in machine tools, industrial robots, electronic devices and office automation (OA) equipment.

In the part number, the number is the stud size (thread diameter G) in mm; B is the hexagon hole in the stud head, V is the full complement type (no V is with cage), UU is the sealed type (no UU is the shield type), and R is the crowned outer ring (no R is cylindrical). This model is sealed type, full complement, cylindrical outer ring.

Where this product is used

• Cam mechanisms, with the outer ring running directly on the cam track
• Linear motion and follower applications
• Machine tools and industrial robots
• Electronic devices and office automation (OA) equipment

Features

• Eccentric type with a hexagon hole in the stud head; thread M20 x 1.5, collar outside diameter 27 mm and eccentricity 0.8 mm
• Full complement needle rollers: suited to heavy loads at low speed rotations
• Sealed type: seals fitted in the narrow clearances to keep foreign substances out
• Cylindrical outer ring: a large contact area on the mating guide surface, for large loads or a low hardness guide surface
• Prepacked with grease
• Basic dynamic load rating C 33,200 N and static load rating C0 64,500 N
• Track capacity 23,200 N on a 40 HRC mating surface

Key specifications

Selecting the right option

This page is a single model, the IKO CFE20VBUU, so there is nothing to select: check the dimensions and ratings in the Model Details against your cam track and mounting hole before you order.

The thread diameter G is the size that goes into your mounting hole. The eccentric collar (outside diameter de in the Model Details) sits in the hole, so the hole must also take the collar, and its length must be at least dimension S (B2 - G1 + 0.5 mm), which is worked out for each model in the Model Details.

This model is the cylindrical outer ring type. A cylindrical ring has a large contact area with the mating guide surface and suits applications where the applied load is large or the guide surface hardness is low.

This model is the full complement type, which is suited to heavy loads at low speed rotations.

Fitting and use

Make the centre axis of the mounting hole perpendicular to the direction of travel and match the stud shoulder accurately with the seating surface given by dimension f (min.) in the Model Details. Keep the chamfer on the mounting hole as small as possible (C0.5 or so), and do not hit the flange head directly with a hammer, because that can lead to irregular rotation or cracking.

The eccentric type is mounted with the mark on the stud head as the reference position. Turn the stud with a screwdriver or hex key in the hexagon hole to adjust the outer ring position, then fix it with a nut and spring washer; do not exceed the maximum tightening torque. Where shock loads are applied and the adjusted eccentricity has to be kept, a dowel pin through the housing, stud and eccentric collar is recommended (not practical for studs under 8 mm).

The mark on the flange head shows the oil hole position on the raceway: keep the oil hole out of the loading zone. The recommended mounting hole tolerance for the stud is H7.

Lubrication: this model is prepacked with grease.

Track capacity is the load that can be applied continuously on a steel cam guide surface of 40 HRC without deforming or indenting it.

Related products

Other IKO CFE series pages (other outer ring, rolling element, seal or material types): CFE series eccentric cam followers, with cage, sealed, cylindrical, M6 to M30 thread, CFE series eccentric cam followers, full complement, sealed, crowned, M18 to M30 thread and CFE series eccentric cam followers, with cage, sealed, crowned, M6 to M30 thread. Related stud types: CF series cam followers, full complement, sealed, cylindrical, 6 to 30 mm stud and NUCF series cylindrical roller cam followers, full complement, shield type, crowned, 10 to 30 mm stud.