SKF
Bearing Accessories
SKF bearing accessories are precision-engineered components that enable proper bearing mounting, secure retention, and efficient dismounting on shafts. The comprehensive accessory portfolio includes lock nuts (standard and keyway-type) for secure axial location, lock washers and locking plates to prevent nut loosening, adapter sleeves that mount bearings with tapered bores onto cylindrical shafts, withdrawal sleeves for bearings on stepped shafts, hydraulic nuts (HMV series) that apply the high drive-up forces needed for mounting large bearings on tapered seatings, and precision lock nuts for super-precision bearing arrangements. For maintenance teams, fitters, and design engineers, selecting the correct SKF bearing accessories is just as critical as choosing the right bearing — improper retention or mounting can lead to premature bearing failure regardless of bearing quality. SKF accessories are manufactured to the same exacting standards as SKF bearings, ensuring dimensional accuracy, material quality, and reliable performance over the full service life of the bearing arrangement.
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Trusted by Industry Leaders
Complete Accessory Range for Every Mounting Method
From simple lock nuts and washers to hydraulic nuts capable of mounting bearings weighing several tons, SKF supplies every accessory needed for secure bearing installation.
Adapter & Withdrawal Sleeves Simplify Shaft Preparation
Tapered adapter sleeves eliminate the need for precision shoulder machining on shafts, while withdrawal sleeves enable bearings to be mounted on stepped shafts and removed without damage.
Hydraulic Nuts for Safe, Controlled Mounting
SKF HMV series hydraulic nuts apply up to several hundred tons of axial drive-up force with minimal effort, enabling accurate bearing internal clearance adjustment and reducing the risk of bearing or shaft damage.
Precision Lock Nuts for Super-Precision Applications
Specially designed lock nuts with fine threads and face runout control maintain the precise preload and stiffness essential for machine tool spindle bearing arrangements.
Quick-Connect Couplings for Hydraulic System Integration
Supplied with quick-connect fittings compatible with SKF hydraulic pumps, making large bearing mounting operations faster, safer, and more repeatable.
Accessories Designed for SKF Bearing Systems
Each accessory is dimensionally matched to specific SKF bearing series, ensuring full compatibility and eliminating the guesswork of sourcing third-party components.
The Critical Role of Bearing Accessories in Machine Reliability
Bearing accessories may be small components, but their impact on overall machine reliability is outsized. A loose lock nut allows the bearing inner ring to creep on the shaft, causing fretting corrosion, shaft wear, and eventual bearing failure. An incorrectly sized adapter sleeve results in excessive or insufficient radial internal clearance, leading to overheating or vibration problems. Without a reliable locking mechanism, bearings subjected to reversing loads or vibration can lose proper axial positioning, compromising the entire shaft arrangement. By specifying genuine SKF bearing accessories designed and manufactured to complement SKF bearings, engineers and maintenance teams eliminate these failure risks and ensure that the bearing arrangement performs as calculated throughout its intended service life.
Hydraulic Mounting and Dismounting: The SKF HMV Nut Advantage
Mounting large bearings on tapered seatings or adapter sleeves requires precise axial drive-up to achieve the correct radial internal clearance or preload. Traditional mechanical methods using spanners and slugging wrenches are slow, imprecise, and pose safety risks. SKF HMV hydraulic nuts transform this process by using hydraulic pressure to apply smooth, controlled axial force. The operator simply pumps the hydraulic hand pump, monitors the pressure gauge, and achieves the exact drive-up distance specified. When dismounting, hydraulic nuts can break the grip between bearing and seating without the hammering and potential damage associated with mechanical removal. Quick-connect couplings on the face and side of each nut provide flexibility in tight mounting spaces, and spare piston seals and maintenance kits are included to maximize equipment service life.