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Needle Roller 3x23.8 mm - Bearing Needle Roller
Processing time: 2-3 days
€11.76
(net)
Price for: 100pcs.
Needle roller 3x23.8 mm - precision bearing needle with a diameter of 3 mm and length of 23.8 mm, designed as a rolling element for appropriately engineered needle roller bearing arrangements and assemblies. Selection should consider nominal dimensions, tolerances and raceway requirements. simmering.pl - stock in Poland with worldwide shipping.
Needle Roller 3x23.8 mm - Bearing Needle Roller
Needle roller 3x23.8 mm is a precision cylindrical rolling element with a 3 mm diameter and 23.8 mm length, designed for use in appropriately engineered needle roller bearing arrangements and needle roller assemblies. Its slender geometry enables a high number of rolling elements to be accommodated within a small radial installation space.
Technical data
| Parameter | Value |
|---|---|
| Product type | Bearing needle / needle roller |
| Diameter Dw | 3 mm |
| Length Lw | 23.8 mm |
| Size | 3x23.8 mm |
| Shape | Slender cylindrical roller |
| Function | Rolling element |
Needle roller 3x23.8 mm dimensions
The basic dimensions are:
Diameter: 3 mm
Length: 23.8 mm
Complete dimensional specification:
3x23.8 mm
Both dimensions are important when selecting a replacement. A needle roller with a 3 mm diameter but a different length is not automatically interchangeable.
What is a bearing needle roller?
A needle roller is a special type of cylindrical roller with a high length-to-diameter ratio.
Unlike a complete needle roller bearing, an individual needle roller does not contain bearing rings or a cage. It is a rolling element that can operate directly against appropriately designed and prepared raceway surfaces.
Needle rollers make it possible to design highly compact bearing arrangements, particularly where radial installation space is limited.
Needle roller 3x23.8 mm as a rolling element
During operation, loads are transmitted through line contact between the needle roller and the raceway.
Correct operation depends not only on the dimensions of the needle roller but also on:
- raceway accuracy,
- hardness of the mating surfaces,
- surface finish,
- shaft and housing geometry,
- operating clearance,
- lubrication,
- alignment of the mating surfaces.
When the shaft or housing bore serves directly as a raceway, its surface becomes an integral functional part of the bearing arrangement.
Selecting a 3x23.8 mm needle roller
When replacing individual needle rollers, the nominal 3x23.8 mm dimensions alone may not be sufficient.
In precision bearing arrangements, additional factors can include diameter tolerance, dimensional sorting, surface geometry and end design.
For this reason, randomly selected needle rollers from different sets or sources should not automatically be mixed within the same precision bearing arrangement.
Needle roller vs complete needle roller bearing
A needle roller is an individual rolling element.
A needle roller and cage assembly contains a set of needle rollers held in their correct relative positions by a cage.
A needle roller bearing may additionally incorporate an outer ring or other structural components.
Therefore, a 3x23.8 mm needle roller is not a complete bearing.
Applications
Needle rollers can be used in appropriately designed:
- needle roller assemblies,
- bearing arrangements without separate rings,
- machinery mechanisms,
- gearboxes and transmissions,
- industrial equipment,
- repair and refurbishment assemblies.
Suitability for a specific application requires correct dimensional matching and properly prepared mating raceways.
Installation and operation
Needle rollers and raceways should be kept thoroughly clean during assembly.
Even small hard contaminants trapped between a needle roller and its raceway can cause localized stress concentrations and surface damage.
Needle rollers should not be installed if they show:
- corrosion,
- pitting,
- scratches on the rolling surface,
- deformation,
- damaged ends.
Lubrication must be selected according to the design and operating conditions of the complete bearing arrangement.
FAQ - Needle Roller 3x23.8 mm
What are the dimensions of the needle roller?
The needle roller has a 3 mm diameter and 23.8 mm length.
Is a 3x23.8 mm needle roller a complete bearing?
No. It is an individual rolling element intended for use within an appropriately designed needle roller bearing arrangement or assembly.
Is the 3x23.8 mm size sufficient to select a replacement?
Not always. Precision applications may also require verification of diameter tolerance, dimensional sorting and other characteristics of the original rolling element.
Can a needle roller operate without an inner ring?
Yes, if the bearing arrangement is designed for the needle rollers to run directly on the shaft and the shaft surface is appropriately manufactured as a raceway.
Can only a few damaged needle rollers be replaced?
Individual rollers should not automatically be replaced with randomly selected components. Dimensional differences between rollers can result in uneven load distribution within a precision assembly.
Needle Roller 3x23.8 mm - key information
Needle roller 3x23.8 mm is a slender cylindrical rolling element with a diameter of 3 mm and a length of 23.8 mm. It is intended for needle roller bearing arrangements and assemblies. Correct selection should consider not only nominal dimensions but also tolerances, raceway requirements, operating clearance and application conditions.
Available from simmering.pl - stock in Poland with worldwide shipping.
Needle roller 3x23.8 mm - precision bearing needle with a diameter of 3 mm and length of 23.8 mm, designed as a rolling element for appropriately engineered needle roller bearing arrangements and assemblies. Selection should consider nominal dimensions, tolerances and raceway requirements. simmering.pl - stock in Poland with worldwide shipping.