Angular contact thrust ball bearings for screw drives
Ball screw support bearings with a 60° contact angle, ground so a pair can be clamped back-to-back under preload. They take the screw thrust and hold axial play close to zero, which is what the position loop actually reads. SES holds the range as an authorised SKF distributor, covering contact angle 60°; bore range About 8 mm to 60 mm on the single-bearing series; tolerance Precision class, faces ground for stacking; sealing Open, shielded and sealed executions. Executions include BSA single bearings, universally matchable, BSD single bearings for larger clamping faces, BEAM ready-to-mount double units, sealed, BEAS ready-to-mount units for flange mounting. It is specified most often into ball screw support on machining centre x, y and z axes and press and punching machine feed axes. Every part is genuine SKF through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
Send an enquiry
Check Price & Availability.
Give us the size or the failed part — we reply on WhatsApp.
Trusted across Metals & Energy
Supplying India’s Industrial Names.
From integrated steel plants to power utilities and EPC majors — the works that cannot afford a counterfeit part specify through SES.
Load
High axial, radial only incidental
Contact angle
60°
Arrangement
Matched pairs or ready-to-mount units
Axial play
Near zero when preloaded
Where it runs.
You will find Angular contact thrust ball bearings for screw drives in the parts of a plant where this particular duty actually occurs. In practice that means ball screw support on machining centre x, y and z axes, press and punching machine feed axes, injection moulding machine screw drives, and equally gantry and portal positioning axes, wire and tube drawing carriage drives, servo-driven assembly and test stations. What links them is the duty rather than the machine name — load: High axial, radial only incidental. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the SKF range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. Screw is long, the axis is slow, and accuracy is the point — Fixed-free arrangement with the support pair at the drive end only. A fixed-fixed screw fights its own thermal growth and the preload climbs through the shift. Nobody on the shop floor should have to set a bearing — A ready-to-mount unit with seals, grease and preload already set. Nothing to match, nothing to grind, nothing to get wrong at assembly. Backlash shows as a step whenever the axis reverses — A preloaded matched pair rather than two loose singles. Two singles will always leave play in one direction, whatever the clamp torque. Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Clamp the inner rings hard against the screw shoulder before you dial-test the axial play. A support bearing that is only nipped up reads perfectly cold and then loses the reading the moment the axis takes a cut.