All SMI Support Rails are designed to accomodate most open type linear bushing and pillow blocks available on the market today.

Standard Support Rails (SR)
Linear Rails or Support Rails are used for effective, low cost continuous or intermittent support. These extruded aluminum suppport rails or linear rails are available in a full range of sizes to accomodate shafts up to 4" diameter. Linear rails can be supplied with or without mounting holes and can be used vertically or horizontally to provide optimum rigidity. Rails are available in standard lengths of 24", 48", and up to 120" and can be easily cut to meet shorter length requirements. At SMI we have the ability to offer continuous rails up to 120" as a standard item, compared to others who only offer it as custom item. Please specify when continuous one piece rails are required.

Support Rail Assemblies (SRA)
Support rail assemblies from SMI are constructed from hardened and precision ground C-1060 carbon steel shafting with a hardness range from 60-65 RC, and aluminum support rail system designed to accomodate any open style bushing and pillow block on taday's market. SMI support raill assemblies exceed current competitive manufacture tolerances for straightness, twist and bow. Each SMI assembly is 100% inspected to this higher level and each product is delivered with our assurance for accuracy and conformance.

Pre-Drilled Supprt Rails (SRPD)
Pre-drilled support rail assemblies from SMI are constructed from hardened and precision ground C1060 carbon steel with a hardness range from 60-65 RC, 6061 Aluminum support system esigned to accomodate any open style bushing and pillow block on today's market. SMI's pre-drilled support rails are machined to provide top down mounting and each rail exceeds current competitive manufacture tolerances for straightness, twist and bow. Each SMI assembly 100% inspected to this higher level and each product delivered with our assurance for accuracy and conformance.

Low Support Rails (LSR)
Low Support Rails permit the design of compact linear motion systems with more than a 40% lower profile. The low shaft support rails are made of 6061 aluminum or AISI C1018 steel. Continuos or intermittent support is permissible when using our pillow blocks. LSR-PD have pre-drilled mounting holes to match the pre-drilled and tapped holes in our pre-drilled shafting or can be ordered without pre-drilled holes. Standard lengths for our low support rails is 48" (±.125") .

Low Support Rail Assemblies (LSRA)
SMI's Low Support Rails come in two varieties such as Aluminum and Steel and come standard at 48" long (+/- .125") made from 6061 material with no holes for mounting. Steel Low Support Rails come standard at 48" long (+/- .125) made from AISI C1018 steel with no holes for mouting. All SMI Low Support Rails are designed to accomodate most open type linear bushing and pillow blocks available on the market today (except Thomson Industries PB-OPN).

Standard Support Rails (SR)

Support Rail Assemblies (SRA)

Pre-Drilled Support Rails (SRPD)

Low Support Rails (LSR)

Low Support Rail Assemblies (LSRA)