The tube holes were cut at Gemini Industrial Machine in Dover, Ohio with work donated to the Trust. The holes were cut with a water jet using a pressure of 60,000psi

A water jet cuts precision holes in the rear tube sheet for PRR T1 #5550 The complex array of holes necessary to house the tubes for PRR T1 #5550 Engraved blanks from the tube sheet are available as a donation premium for the 5550 Boiler Club.

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