
SKF SMSW 20 -ASTR mounting and maintenance tools
- Brand
- SKF
- Category
- Mounting and maintenance tools
- Subcategory
- Mounting and maintenance tools
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Description
SKF SMSW 20 -ASTR belongs to mounting and maintenance tools, part of our Mounting and maintenance tools range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for SMSW 20 -ASTR and any equivalents.
A self-aligning support from the SKF SMSW line holds and positions a linear guide shaft while absorbing slight misalignment between the shaft and the mounting structure. That helps installation go more smoothly and keeps extra stress out of the assembly. You will find these supports in machine tools, automation equipment and transport systems, wherever linear motion has to be smooth and dependable. MR Industrial Accessories supplies this SKF line and can help you match the support to your shaft diameter and operating conditions.
The SMSW code covers SKF's self-aligning supports for linear guide shafts. The figure after the letters tells you the shaft size the support fits: SMSW 20 -ASTR takes a 20 mm shaft, SMSW 24 -ASTR a 24 mm shaft and SMSW 30 -ASTR a 30 mm shaft. The -ASTR ending marks a variant within the series, usually tied to how the support fastens or what it is made of. Reading the code correctly lets you order the exact replacement without guesswork.
Precise, repeatable linear movement is what these supports are built for. Machine tool builders, machining cells, packaging lines, handling and internal transport systems, and automotive operations all rely on them. Food and pharmaceutical plants use them too, where fine adjustment and cleanliness matter. Absorbing misalignment helps shafts and runner blocks last longer and makes assembly easier on welded or machined structures.
Shaft diameter, fastening method and the working environment are the three things to check when selecting a support. The self-aligning action takes up small parallelism errors between shaft and base, but it is not a substitute for careful alignment. Keep the mounting surfaces clean and flat, then tighten the screws little by little in a cross pattern. Where dust, moisture or chips are present, add protection. Lubrication of the shaft and the condition of the runner blocks also shape how the assembly performs.
SKF SMSW supports can be swapped with other brands that share the same dimensional and functional standard, but confirm the mounting dimensions and load capacity first. Self-aligning series are not all interchangeable with one another. When replacing an existing support, compare the complete code and the critical dimensions. MR Industrial Accessories can identify the right part from a photo or from the code marked on the component.
If you already know the code of your SKF SMSW support, send it to MR Industrial Accessories by WhatsApp or email and we will prepare a quote. We can also help if you are putting together a full assembly with shafts, runner blocks and mounting accessories.
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 -ASTR suffix mean in SKF SMSW supports?
- It identifies a variant within the SMSW series, generally related to the fastening type or the support material. For the exact characteristic behind your code, check SKF's technical documentation or ask us on WhatsApp.
- How do I choose the right SMSW support for my shaft?
- The number in the code is the shaft diameter: SMSW 20 -ASTR fits a 20 mm shaft. Also check the fastening type and the working environment. If you are unsure, send us your shaft measurements and application on WhatsApp and we will guide you.
- Are SKF SMSW supports interchangeable with other brands?
- They may be compatible with other brands that follow the same dimensional standard, but interchangeability is not universal. Compare the mounting dimensions, shaft diameter and load capacity before replacing. If in doubt, consult us with the original code.

