The modular design of Hi-Force SBT series spring return hydraulic bolt tensioners allows the user to adapt an existing SBT tensioner assembly to another thread size, within the tensioner range. This can be done by buying each component individually or a simple conversion kit. By modifying the needed parts (see drawing and table on the next page), Hi-Force SBT bolt tensioners provide the user even better flexibility while being cost effective. Tensioner models SBT3, SBT4 and SBT6 are offered with two varied bridge sizes; thus, you should always verify whether or not the desired thread modification is feasible within the bridge size (please follow colored lines in below drawing). Also, check that all components match up, and do not mix parts from dissimilar color lines. A large bridge will also require a long threaded puller to ensure sufficient thread engagement, as well as a large size nut rotating socket. Modifying within the similar color code will not need a bridge alteration; however, modifications from red to blue line (or vice versa) should incorporate a relative bridge as well. The below table will supply part numbers for all the tensioner parts, wherein the same color coding is utilized, i.e. red denotes the smaller bolt sizes within the tensioner range, consisting of short threaded adapter, load cell, small bridge, small nut rotating socket and Tommy bar. The blue line denotes the larger bolt sizes within the tensioner range, wherein the tensioner is made from the long threaded adaptor, load cell, large bridge, large nut rotating socket and Tommy bar. This table provides all the information to select the components to modify your existing tensioner to suit another bolt size. Changes are only possible within the same tensioner size. It is essential that all the components or selected conversion kits have the same suffix as the target tensioner size (i.e. B1, B2 or B3). Examples: To change from SBT3-M42B1 to SBT3-M48B1 would require conversion kit CKS3-M48B1 only. To change from SBT3-M48B1 to SBT3-M52B2 would require conversion kit CKS3-M52B2 and bridge STS3-B2. Denotes smaller bridge size within tensioner range Denotes larger bridge size within tensioner range Denotes one bridge size within tensioner range
Use with SBT Metric Spring Return Tensioners
Please check attached brochure for details.
Don't forget to order your tommy bars when purchasing Hi-Force hydraulic tensioners. We recommend the purchase of one tommy bar for every four hydraulic tensioners. , Conversion kits for SBT metric range of bolt tensioners are also available.