PTFE Flange Bushings
PTFE flange bushings with an integrated flange, dry running and self lubricating, for pivots that need axial location.
PTFE Flange Bushings — Finished Parts
PTFE Flange Bushings for Different Mounting Requirements
A standard PTFE composite bushing supports a moving shaft within a housing. A PTFE flange bushing uses the same sliding layer and steel backing, with an integrated flange at one end.
The flange can help position the bushing during assembly and provide an axial stop when the housing design allows it, so the assembly does not need a separate locating component. The difference between the two designs comes down to mounting geometry: besides the bore, outside diameter and bushing length, the flange diameter and thickness have to fit the surrounding components.
For replacement projects, check the complete mounting arrangement before switching from a straight bushing to a flanged design.
| Feature | Straight PTFE Composite Bushings | PTFE Flange Bushings |
|---|---|---|
| Structure | Cylindrical sleeve | Cylindrical sleeve with an integrated flange |
| Radial support | Supports the shaft within the housing | Supports the shaft within the housing |
| Axial positioning | Depends on housing shoulders, retaining rings or other features | The flange can provide an axial stop when the design allows |
| Installation space | Mainly determined by the bushing dimensions | Also requires clearance for the flange |
| Key dimensions | Bore, outside diameter and length | Bore, outside diameter, length, flange diameter and thickness |
Check the Flange Dimensions Before Ordering
When selecting PTFE flange bushings, matching the bore diameter alone is not enough. The bushing body and the flange both have to fit the existing assembly.
Check these dimensions before confirming your order.
| Dimension | What to Check |
|---|---|
| Bore diameter (d1) | Shaft diameter and required running clearance |
| Outside diameter (d2) | Housing bore and specified fit |
| Bushing length (b) | Available mounting depth |
| Flange outside diameter (d3) | Clearance from adjacent components and the flange seating area |
| Flange thickness (b1) | Available axial space and the required installed position |
A flange that is too large may interfere with nearby parts, and one that is too thick may change the axial position of the assembly. For replacement bushings, compare the dimensions against the original drawing or sample, and confirm the shaft condition, operating load, sliding speed and temperature before approving the replacement.
Standard Sizes for PTFE Flange Bushings
Standard sizes cover common shaft diameters from 6 mm to 40 mm. Dimensions are in millimetres; d1 is the bore, d2 the outside diameter, d3 the flange outside diameter, b the bushing length and b1 the flange thickness.
| Shaft Dia. (mm) | Shaft Tolerance (upper/lower) | Housing (H7) | Size | ||||||
|---|---|---|---|---|---|---|---|---|---|
| d1 | d2 | d3+0.5 | b+0.25 | b1-0.2 | f1 | f2 | |||
| 6 | -0.013/-0.028 | 8 | 6 | 8 | 12 | 4 | 1 | 0.5 | 0.4 |
| 6 | -0.013/-0.028 | 8 | 6 | 8 | 12 | 7 | 1 | 0.5 | 0.4 |
| 8 | -0.013/-0.028 | 10 | 8 | 10 | 15 | 5.5 | 1 | 0.5 | 0.4 |
| 8 | -0.013/-0.028 | 10 | 8 | 10 | 15 | 7.5 | 1 | 0.5 | 0.4 |
| 10 | -0.016/-0.034 | 12 | 10 | 12 | 18 | 7 | 1 | 0.5 | 0.4 |
| 10 | -0.016/-0.034 | 12 | 10 | 12 | 18 | 9 | 1 | 0.5 | 0.4 |
| 10 | -0.016/-0.034 | 12 | 10 | 12 | 18 | 12 | 1 | 0.5 | 0.4 |
| 12 | -0.016/-0.034 | 14 | 12 | 14 | 20 | 7 | 1 | 0.5 | 0.4 |
| 12 | -0.016/-0.034 | 14 | 12 | 14 | 20 | 9 | 1 | 0.5 | 0.4 |
| 12 | -0.016/-0.034 | 14 | 12 | 14 | 20 | 12 | 1 | 0.5 | 0.4 |
| 14 | -0.016/-0.034 | 16 | 14 | 16 | 22 | 12 | 1 | 0.5 | 0.4 |
| 14 | -0.016/-0.034 | 16 | 14 | 16 | 22 | 17 | 1 | 0.5 | 0.4 |
| 15 | -0.016/-0.034 | 17 | 15 | 17 | 23 | 9 | 1 | 0.5 | 0.4 |
| 15 | -0.016/-0.034 | 17 | 15 | 17 | 23 | 12 | 1 | 0.5 | 0.4 |
| 15 | -0.016/-0.034 | 17 | 15 | 17 | 23 | 17 | 1 | 0.5 | 0.4 |
| 16 | -0.016/-0.034 | 18 | 16 | 18 | 24 | 12 | 1 | 0.5 | 0.4 |
| 16 | -0.016/-0.034 | 18 | 16 | 18 | 24 | 17 | 1 | 0.5 | 0.4 |
| 18 | -0.016/-0.034 | 20 | 18 | 20 | 26 | 12 | 1 | 0.5 | 0.4 |
| 18 | -0.016/-0.034 | 20 | 18 | 20 | 26 | 17 | 1 | 0.5 | 0.4 |
| 18 | -0.016/-0.034 | 20 | 18 | 20 | 26 | 20 | 1 | 0.5 | 0.4 |
| 20 | -0.020/-0.041 | 23 | 20 | 23 | 30 | 11.5 | 1.5 | 0.8 | 0.4 |
| 20 | -0.020/-0.041 | 23 | 20 | 23 | 30 | 16.5 | 1.5 | 0.8 | 0.4 |
| 20 | -0.020/-0.041 | 23 | 20 | 23 | 30 | 21.5 | 1.5 | 0.8 | 0.4 |
| 22 | -0.020/-0.041 | 25 | 22 | 25 | 32 | 15 | 1.5 | 0.8 | 0.4 |
| 22 | -0.020/-0.041 | 25 | 22 | 25 | 32 | 20 | 1.5 | 0.8 | 0.4 |
| 25 | -0.020/-0.041 | 28 | 25 | 28 | 35 | 11.5 | 1.5 | 0.8 | 0.4 |
| 25 | -0.020/-0.041 | 28 | 25 | 28 | 35 | 16.5 | 1.5 | 0.8 | 0.4 |
| 25 | -0.020/-0.041 | 28 | 25 | 28 | 35 | 21.5 | 1.5 | 0.8 | 0.4 |
| 30 | -0.025/-0.050 | 34 | 30 | 34 | 42 | 16 | 2 | 1.0 | 0.5 |
| 30 | -0.025/-0.050 | 34 | 30 | 34 | 42 | 26 | 2 | 1.0 | 0.5 |
| 35 | -0.025/-0.050 | 39 | 35 | 39 | 47 | 16 | 2 | 1.0 | 0.5 |
| 35 | -0.025/-0.050 | 39 | 35 | 39 | 47 | 26 | 2 | 1.0 | 0.5 |
| 40 | -0.025/-0.050 | 44 | 40 | 44 | 53 | 26 | 2 | 1.0 | 0.5 |
| 40 | -0.025/-0.050 | 44 | 40 | 44 | 53 | 40 | 2 | 1.0 | 0.5 |
Sizes outside this table are made to your drawing. Send the bore diameter, flange diameter and flange thickness you need, and we machine to custom sizes.
Steel-Backed PTFE Composite Structure
PTFE flange bushings use the same steel-backed composite structure as the corresponding straight PTFE bushings. The integrated flange changes the mounting geometry, not the sliding layer design.
The PTFE-based sliding layer is made for low friction sliding and for dry running, where external lubrication may be reduced or unnecessary, depending on the operating conditions and material specification. The composite is self lubricating in that sense, and the steel backing supports the structure and helps the bushing fit into its housing. Actual performance depends on the material grade, shaft surface, load, sliding speed and operating temperature.
When selecting a replacement, confirm that the material specification and operating limits meet the requirements of your application. A flange on its own does not raise the load capacity or the temperature rating of the bushing.
When Do You Need a Flanged Bushing?
A flanged bushing is useful when the assembly needs both radial shaft support and a defined axial locating surface.
The bushing needs an axial stop
The flange can locate the bushing against a suitable housing surface and help control its installed position.
Space for separate locating parts is tight
An integrated flange may simplify the arrangement when the surrounding design permits it.
The original component has a flanged profile
Matching the existing flange geometry can help maintain the intended mounting position during replacement.
A straight bushing may be sufficient when the housing already controls axial position and no flange is required. If the flange will also carry axial load, check the contact area, load direction and material limits. Not every flanged bushing is suitable for thrust loading.
Standard Sizes and Custom PTFE Flange Bushings
GLARY offers PTFE flange bushings in standard sizes for common mounting requirements, with custom manufacturing to your drawing for assemblies that need a specific flange profile or fit.
Whether you are selecting a standard size or replacing an existing part, confirm the bore diameter, outside diameter, bushing length, flange diameter and flange thickness against your application requirements. For non-standard requirements, send us your drawing for review. We can check the dimensions and technical specifications before confirming the order. An existing part number, sample or dimensioned engineering drawing also helps clarify the required fit and mounting arrangement.
How to Specify a PTFE Flange Bushing
To specify a PTFE flange bushing, provide the main dimensions and operating conditions of your application.
Dimensions
- Shaft diameter
- Housing bore diameter
- Bushing length
- Flange outside diameter
- Flange thickness
Operating conditions
- Radial load and any axial load on the flange
- Sliding speed and type of movement
- Operating temperature
- Lubrication conditions
- Shaft material and surface finish, if available
An existing part number, sample or dimensioned drawing helps us check the required geometry. If the standard dimensions do not match your assembly, send your drawing for review.
Related PTFE Composite Bushings
Other designs in the same material family, for assemblies that do not need an integrated flange.
PTFE Composite Bushings
Our standard cylindrical PTFE composite bushings, for applications that do not require an integrated flange.
PTFE Composite Bushings →POM Composite Bushings
Worth reviewing when you are comparing a different sliding-layer material for the same position.
POM Composite Bushings →Composite Bushings
The full range of composite bushings, with the available designs side by side.
Composite Bushings →PTFE Flange Bushings FAQ
Questions that come up most often when specifying or replacing a flanged composite bushing.
Can a PTFE flange bushing replace a standard DU-type bushing?
Can the flange carry axial load?
Are PTFE flange bushings available in standard sizes?
Can PTFE flange bushings be made to a custom drawing?
What should I check when replacing an existing flanged bushing?
Need PTFE Flange Bushings for Your Application?
Choose from our standard sizes or send us your drawing for a custom specification.
To review your requirements we need the bushing dimensions, operating conditions and required quantity. For replacement projects an existing part number, sample or engineering drawing is also useful.