SKF claims it has developed a new way of bolting together steam turbine casings. Cold Tight allows steam turbine casings to be bolted together without the application of heat or other traditional bolt tightening techniques. It uses hydraulic oil power to pre-load the casing studs allowing them to be hand-tightened to the correct extension.
The system uses studs which have an internal tapered thread, keeping the entire assembly within the spot face diameter on the casing.
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