SKF AN 40 lock nut
- Brand
- SKF
- Category
- Bushings and sleeves
- Subcategory
- Lock nut
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Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
SKF and NSK: matching part numbers →SKF and NTN: matching part numbers →SKF and TIMKEN: matching part numbers →
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Description
SKF AN 40 belongs to lock nut, part of our Bushings and sleeves range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for AN 40 and any equivalents.
AN series lock nuts from SKF hold bearings and similar components in place on threaded shafts. They let a maintenance technician set the axial position in a controlled way, so assembly and removal can be done without harming the bearing or the shaft. Typical users are industrial machinery, transmission equipment and bearing arrangements that need a fixing point that repeats the same way every time.
Reading the code helps you pick the right nut. The letters AN mark the series, and the figure after them is a size code rather than a shaft measurement. Multiply that figure by five and you get the thread diameter in millimeters: AN 15 is an M75×2 nut, AN 16 is M80×2, and the pattern holds through the range. Confirm this against the thread on your shaft before ordering.
These nuts show up in metallurgy, food processing, petrochemical and transport operations, often on conveyors, pumps, fans, mills and machine tools where a bearing has to stay put. Because the nut can be run down and backed off in a controlled manner, service work is quicker and there is less risk of scoring a shaft or a bearing face.
Selection starts with two checks: the shaft thread diameter and pitch, and the bearing that will be locked. Use a wrench that fits the nut properly and tighten to the torque the application calls for, since over-tightening can distort the nut. A light film of lubricant on the threads eases assembly and limits corrosion, and keeping the nut square to the shaft avoids axial loads that would work against the bearing.
Where dimensions and thread match, an SKF AN nut can be swapped for another maker's equivalent, including KM or KML items, but pitch and diameter always have to be confirmed first. Compare the manufacturers' data sheets before substituting anything.
To get a quote, send the code or the full designation to MR Industrial Accessories by WhatsApp or email. The team answers quickly, can point you to equivalents and will help you match the nut to your bearing and shaft.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does the AN code tell me?
- AN identifies a standard lock nut. The number after it is a size code, not the shaft diameter: multiply it by five to get the thread diameter in millimeters. AN 15, for instance, is M75×2.
- How should an SKF AN lock nut be installed?
- Thread it onto the shaft, tighten with a suitable wrench to the recommended torque, and fit the locking device if the design requires one. Lubricate the threads and keep the nut aligned to prevent damage.
- Can I replace it with another brand?
- Yes, if the dimensional and thread standards are the same. KM or KML nuts are often equivalent, but verify pitch and diameter against the technical data before fitting.