Southern Railway of British Columbia
SRY 122 GP9 mother and 001 slug inside shop. 9/25/2012
1256 (acq. 2012 ex Eurocan Pulp & Paper 1256 nee CN 1256) SW1200RS GMD A1028 12/1956
Sold by J&L Consulting (D) to Pend Oreille Valley RR in Washington state.
Two of four heavy duty jacks (yellow) are part of shop equipment.
Hegenscheidt In-Ground Wheel Truing Machine.
These are unique machines that most railroaders are not
familiar with since most shops employ Stanray Wheel Truing Machines. The
main difference between the two is that the Stanray machine is a Milling
Machine that uses two profiled rotating heads full of cutting inserts
to true the wheels that are turned on centres. The Hegenscheidt machine
is an actual lathe that cuts steel off the wheels in a continuous strip.
The wheelset is positioned over the centre of the machine and basically
two drive wheels on each side are raised up to contact and drive the flange
of the wheel. The rails either side of the machine are swung out of the
way and the machine bed is lowered then moved in to bring the drive rollers
up under the wheels. The wheels are held in place through this move by
small stationary blocks you can see in the picture if you look closely.
When the drive rollers are up and have taken the weight of the unit they
are turned on. Then the actual cutters are brought in to true the wheel.
Its all done hydraulically. Once the tread is profiled the weight
and drive is moved to the tread of the wheels so the flange can be cut.
Its an art form, lets just leave it at that!
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