Construction Blog
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Proof machining of the Coupled Driving Wheels
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On 7th April, the Trust took delivery of a 40ft container at CTL Seal for the storage of parts and equipment.
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More orders have been placed - this time for the Plain Axle forgings and the Roller Bearings.
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An order was placed with South Devon Railway Engineering on 14th February, for the steel forging for the tyres on the rolling chassis - that is the six driving wheels (being cast at the moment - see January 2022 update) and the four on the front bogie.
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19th January, William Cook Cast Products prepared and cast the first wheel in a mould proving run. The photo below is the final result.
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Whilst on a visit last week (16th December) to William Cook's premises in Sheffield, our chairman took some photos of the wheel patterns, which were being prepared to create the casting moulds. He was also shown the computer simulations which showed the pouring, the cooling and estimates the shrinkage likely to occur, using a program called MagmaFlow. Casting is scheduled to commence in January.
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Manufacturing orders have been placed with William Cook Cast Products Ltd (WCCP) for the six 6'8" Driving Wheels. These castings will be using the same wheel pattern as used for Tornado's wheels, the patterns having been loaned to us by the A1 Steam Locomotive Trust, whose generous help is gratefully acknowledged. The wheel pattern is being prepared in the Pattern Shop at WCCP. Each wheel will be subject to additional Non Destructive Testing (NDT) using a combination of Radiographic (X-ray) and Ultrasound Tests, once cast, to provide greater assurance and integrity in the product. The order follows recent Coupled Axlebox castings and two Cannon Axlebox castings, also by William Cook Cast Products of Sheffield.
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A resume: Work on 61673 started when the frames were cut in 2015 and we were based in Llangollen. In 2020, we moved to the premises of CTL Seal in Sheffield and are currently involved in the manufacture of the Rolling Chassis. Although nothing was left of the locomotives, we were fortunate to acquire 2 tenders – a GER pattern one and an LNER pattern one. These were originally stored at Dereham on the MNR but were moved to Sheffield in August 2020.
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William Cook Cast products have completed the casting of the Coupled Axleboxes and the Cannonbox sections ordered, as reported, last month. It is interesting to compare the actual castings with the CAD images illustrated earlier.
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Orders for the Manufacture of Steel Castings for Timken Roller Bearings