IKO CR48VUU Inch Cam Follower, 1 1/4 in stud, 3 in OD, Sealed, Cylindrical
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The IKO CR48VUU is an inch cam follower with a screwdriver slot in the stud head, full complement needle rollers, sealed type construction and a cylindrical outer ring. It has a 31.75 mm (1 1/4 in) stud (1 1/4-12 thread), a 76.2 mm (3 in) outer ring and an outer ring width of 44.45 mm (1 3/4 in). Basic dynamic load rating C is 77,600 N and static load rating C0 is 172,000 N.
The CR series is the inch series cam follower, sized in fractions of an inch. 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 outer ring diameter in 1/16 inch; B is the hexagon hole in the stud head (no B is the screwdriver slot), 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
- Stud type with a screwdriver slot in the stud head; stud diameter 31.75 mm (1 1/4 in), thread 1 1/4-12
- 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 77,600 N and static load rating C0 172,000 N
- Track capacity 64,300 N on a 40 HRC mating surface
Key specifications
| Specification | Detail |
|---|---|
| Type | Inch series cam follower (stud type) |
| Model | CR48VUU |
| Rolling elements | Full complement needle rollers |
| Seal | Sealed type (UU in the part number) |
| Outer ring | Cylindrical outer ring |
| Stud head | Screwdriver slot in the stud head |
| Outer ring diameter D | 76.2 mm (3 in) |
| Outer ring width C | 44.45 mm (1 3/4 in) |
| Stud diameter d1 | 31.75 mm (1 1/4 in) |
| Thread G | 1 1/4-12 |
| Thread length G1 | 31.75 mm (1 1/4 in) |
| Length B (head to stud shoulder) | 46.4 mm max (1.83 in) |
| Stud length B2 | 63.5 mm (2 1/2 in) |
| Seating surface dimension f (min.) | 51.991 mm (2 3/64 in) |
| Maximum tightening torque | 500 N-m |
| Basic dynamic load rating C | 77,600 N |
| Basic static load rating C0 | 172,000 N |
| Track capacity (mating surface 40 HRC) | 64,300 N |
| Mass (reference, body only, accessories not included) | 1,960 g |
| Lubrication | Prepacked with grease |
| Oil hole | One oil hole each in the stud head, outside surface and end surface of the stud |
| Supplied with | Grease nipple, plug for the unused oil hole and nut |
| Recommended mounting hole tolerance for the stud | F7 |
| Brand | IKO (Nippon Thompson Co., Ltd., Japan) |
Selecting the right option
This page is a single model, the IKO CR48VUU, 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.
Match the stud diameter and thread to your mounting hole and nut: the Model Details list the thread and the thread length.
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.
The Model Details give each dimension in mm with the inch size in brackets.
A maximum allowable static load is not published for the inch cam follower series: ask AIMS if you need that figure.
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.
Hold the screwdriver slot with a slotted screwdriver and tighten the nut with a spanner: turning the slot itself to tighten can damage it. Do not exceed the maximum tightening torque in the Model Details, because an over-tightened thread can break. Where loosening is possible, use a lock nut, spring washer or self-locking nut.
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 F7.
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. For a different hardness it is multiplied by the track capacity factor (0.58 at 30 HRC): ask AIMS if you need the factor for your guide surface.
If you are unsure which size suits your cam track and mounting, send AIMS the part number or the dimensions and we will help you confirm it.
Related products
Other IKO CR series pages (other outer ring, rolling element, seal or material types): CR series inch cam followers, full complement, sealed, cylindrical, 1/2 to 2 in OD, CR series inch cam followers, full complement, sealed, crowned, 1/2 to 1 1/2 in OD, CR series inch cam followers, with cage, sealed, cylindrical, 1/2 to 2 1/4 in OD and CR series inch cam followers, with cage, sealed, crowned, 1/2 to 2 in OD. Related stud types: CRH series heavy duty inch cam followers, full complement, sealed, cylindrical, 1/2 to 3 1/2 in OD.
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