SKF PHFFX51-28X55 Keyless shaft bushing / locking assembly
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Product Description
SKF PHFFX51-28X55 keyless shaft bushing / locking assembly. Frictional shaft-to-hub coupling that transmits torque without a key or splined joint, by radial-elastic clamping between the shaft and hub. Executed as a double-taper collet (self-centring), a single-taper Ringfeder-style assembly, or a stepped-piston hydraulic clamp. Removed and re-installed non-destructively; excellent choice for high-precision or high-torque locations where a keyway would fatigue the shaft.
Technical Specifications
- Type
- Keyless shaft bushing / locking assembly
- Designation
- SKF PHFFX51-28X55
- HS code
- 8483.60
- Bore diameter
- 28 mm
- Outside diameter
- 55 mm
- Width, total
- 34 mm
- Element width
- 17 mm
- Bushing number
- FX51
- Category
- Keyless bushings
- Number of clamp screws
- 6
- Product net weight
- 0.4 kg
- eClass code
- 23-05-19-01
- UNSPSC code
- 31171605
Standards & Compliance
- Standard
- SKF designation convention
- Material
- As declared by SKF designation suffix
- Temperature Range
- Per SKF product data
- HS Code
- 8483.60
Cross References
- Ringfeder 512855
- Fenner 512855
- KTR 512855
- Tollok 512855
- Equivalent: 512855 (Ringfeder)
- Equivalent: 512855 (Fenner)
- Equivalent: 512855 (KTR)
- Equivalent: 512855 (Tollok)
Compatibility & Fitment
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Product Documentation
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Technical guides
- Taper Bush Finder — Sizes 1008 to 5050 by Bore, QD Bushes (SH–M) and Keyless Locking Assemblies (SKF PHF TB / SF / FX)
- SKF 81xxx Cylindrical Roller Thrust Bearing — Dimensions, Load Ratings & Interchange (81102 to 81140)
- SKF Deep Groove Ball Bearing Reference — 6000 / 6200 / 6300 / 6400 Series (Dimensions, Load Ratings, Interchange to FAG NSK NTN Timken)
Catalogue entry last verified: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy PHFFX51-28X55?
- PHFFX51-28X55 can be ordered from cballast.com as a SKF catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this SKF product?
- The manufacturer part number is PHFFX51-28X55.
- What is the HS code for PHFFX51-28X55?
- The customs tariff (HS) code for PHFFX51-28X55 is 8483.60.
- Who manufactures PHFFX51-28X55?
- PHFFX51-28X55 is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for PHFFX51-28X55?
- Yes — the PHFFX51-28X55 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for PHFFX51-28X55?
- The minimum order quantity is 1.
- Is PHFFX51-28X55 available?
- Yes — PHFFX51-28X55 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).