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Linear motion SKF LUNF 40-2LS
- Manufacturer Part Number
- LUNF 40-2LS
- Brand
- SKFOfficial brand
- Category
- Linear motion
- Subcategory
- Linear motion
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Description
SKF LUNF 40-2LS is a linear motion reference, within Linear motion. Request a quote for LUNF 40-2LS via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The SKF LUNF LS series linear unit is a guidance component that combines a housing with a linear ball bearing, designed for smooth and precise linear motion on cylindrical shafts. It is used in automation, machine tools and handling equipment where low friction and high repeatability are required. MR Accesorios Industriales offers this line as part of its linear motion range, with technical advice to choose the right configuration.
The LUNF LS series designation is read in parts: LUNF identifies the family of linear units with housing, and LS indicates the double seal that protects the bearing against dust and moisture. The number that follows, as in LUNF 40-2LS, corresponds to the nominal shaft diameter in millimeters. In the example, 40 refers to a 40 mm shaft. The suffix -2LS confirms the double-sided seal, while other variants may have a single seal or none. Knowing this nomenclature allows you to order the correct replacement without ambiguity.
These units are used in industries such as automotive, food, wood and metallurgical, in Argentina. They are found in robotic arms, cutting tables, internal transport systems and assembly machines. They are also common in packaging and labeling equipment, where cleanliness and precision are critical. By integrating the housing and bearing into a single piece, they simplify assembly and reduce setup time. MR Accesorios Industriales offers them for replacement or new developments.
To select a LUNF LS unit, consider the load it will support, the travel speed and the environmental conditions. The 2LS seal is recommended in environments with dust or chips, while in clean applications a single seal may be sufficient. Check the alignment of the shaft and housing: excessive misalignment shortens bearing life. Factory lubrication is usually sufficient, but in intensive cycles it is advisable to check the condition of the grease. Follow the manufacturer's instructions for assembly and fastening.
Regarding equivalences, SKF linear units can be interchanged with products from other brands that follow the same standardized dimensions, such as linear bearing units with housing. However, always verify tolerances and seal type, as they may vary between manufacturers. For replacements, the safest approach is to compare the complete part number and shaft dimensions. If you have doubts, the MR technical team can help you find the right alternative.
If you need a quote for the SKF LUNF LS series linear unit, send us the complete part number via WhatsApp. With that information we can confirm the configuration and give you a precise answer. We can also advise you on other linear motion components we carry.
This description provides guidance on the product type. Check the configuration and dimensions of this reference.
Dimensions
Dimensions and tolerances: Send us the part number via WhatsApp and we'll confirm dimensions, sealing, and internal clearance against the manufacturer's data sheet.
Frequently Asked Questions
- What does the LS suffix mean in the LUNF series?
- The LS suffix indicates that the unit incorporates double seals, one on each side of the bearing. This improves protection against dust, chips and moisture, and helps retain lubrication. It is a common option in demanding environments.
- How do I choose the correct diameter for my application?
- The number in the part number, such as 40 in LUNF 40-2LS, corresponds to the shaft diameter in millimeters. Measure the shaft you will use and select the matching unit. If the shaft is already mounted, check that it is not worn.
- Can I replace a unit from another brand with this SKF one?
- Generally yes, as long as the main dimensions match: shaft diameter, housing height and hole spacing. Also check the seal type and load capacity. If you have the original part number, send it to us and we will help you compare.

