Product page
Freewheel RINGSPANN SF 340-63 S
- Manufacturer Part Number
- SF 340-63 S
- Brand
- RINGSPANNExclusive representative in Argentina
- Category
- Power transmission
- Subcategory
- Freewheels
![]()
We respond promptly.
Request your quote via WhatsApp or email, with the quantity and time frame you need.
Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.
Description
RINGSPANN SF 340-63 S is a freewheel reference, within Power transmission. Request a quote for SF 340-63 S via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
RINGSPANN SF series freewheels are power transmission components that allow rotation in one direction and lock movement in the opposite direction. They are used as backstop, anti-reverse mechanisms or to engage and disengage shafts according to the direction of rotation. MR Accesorios Industriales supplies them in Buenos Aires, Argentina, with technical advice to select the right model.
The designation of the SF series combines the size of the assembly and the shaft or housing diameter. For example, SF 140-50 S and SF 140-63 S share size 140 but differ in the following dimension, which defines the bore diameter or the mounting diameter. The suffix S indicates a construction variant within the series. Models such as SF 170-50 S, SF 200-63 S or SF 270-50 S show how the size and the combination of dimensions change. To identify the exact part number, have the drawing or the shaft dimension at hand.
These freewheels are used in equipment where it is necessary to prevent reverse rotation or allow rotation in one direction only: conveyor belts, bucket elevators, gearboxes, packaging machines, fans and transmission systems in general. In Argentine industry they appear in food, cement, steel and mining plants and in machinery manufacturers. They are also used as a safety component in lifting mechanisms and in equipment where reverse rotation can damage the process or create risks.
To select an SF freewheel, first define the shaft diameter, the torque to be transmitted and the rotation speed. Then verify the type of mounting: on shaft, in housing or as an assembly. Sealing and lubrication depend on the environment: in the presence of dust or humidity, the mechanism should be protected. Alignment between shaft and housing is critical to avoid lateral loads and premature wear. If the equipment works with reversing rotation, confirm that the freewheel is suitable for that function.
Freewheels are interchanged between manufacturers by dimensional and performance equivalents, not by the commercial part number. If you have the model from another brand, we can compare diameters, torque and mounting type to offer you the equivalent RINGSPANN alternative. In all cases, dimensional and functional verification is the user's responsibility. MR Accesorios Industriales supplies the SF series with the brand's backing and advises on selection according to the application.
To request a quote for a RINGSPANN SF series freewheel, send us via WhatsApp the complete part number shown on the nameplate or drawing: for example, SF 170-63 S or SF 230-63 S. If you do not have it, send us the shaft dimensions, torque and working conditions. We will reply promptly with the available option and the technical data you need to confirm your choice.
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
- How do I identify the RINGSPANN SF series freewheel model I need?
- The part number combines the size and a shaft or housing dimension, plus the S suffix. For example, SF 140-50 S. If you do not have the part number, send us the shaft diameter, torque and mounting type so we can guide you.
- What applications do SF freewheels have in industry?
- They are used in conveyor belts, elevators, gearboxes, fans and packaging machines, among other equipment. Their function is to allow rotation in one direction and lock the opposite direction, preventing reverse rotation or damage to the mechanism.
- How do I request a quote for a RINGSPANN SF freewheel via WhatsApp?
- Write to us with the complete model part number, for example SF 200-63 S, or with the shaft dimensions and working conditions. We will reply promptly with the technical information and the available alternative.

