hra fb twitter
sheffield
header

Latest News

Current news items are listed below. If the Acrobat icon is shown, then click on the icon to read the attachment. If an image is shown, you can click it for a full size image. You can find old news items in the News Archive.

Bogie parts (1)
08/08/2022
  Highslide JS
  A busy day today. First job was to get the bogie wheels moved from the machine shop to the assembly shop. The wheels had been machined for oil release grooves. This is a feature of the modern railway (although it was dicussed in the 1950's British Railways Meetings) where high pressure oil is injected into the seat between the wheel and the axle and helps to remove the wheel from the axles without causing damage. Next job was fro Mike Healey to remove the sharp edge on he inner boss. The drawings call for a 1/32" radius here.
   
Bogie parts (2)
08/08/2022
  Highslide JS
  Next, Bob Ife and Ashly Shimwell got to work degreasing and getting some paint onto the wheels. This is an etch primer to be followed by coats of undercoat and top coat. We will leave this side of the wheels in primer but the boss on the inside face will be top coated as it will be virtually inaccessible once the wheel is joined to the axle and cannon box. The cannon boxes are on their last machining process and should have finished machining tomorrow (Aug 9)
   
Bogie parts (3)
08/08/2022
  Highslide JS
  While the painting was in progress, we wanted a trial fitting of the bogie side frame plates to the stretcher. In order to get gravity on our side, the bogie stretcher was turned upside down. Here Anthonly Pilkington is in charge of the overhead crane as we slowly to the stretcher over. Keith, Alan and Mike look on
   
Bogie parts (4)
08/08/2022
  Highslide JS
  With the bogie stretcher sitting on a pair of heavy duty trestles, it was time to lift the frame plates into position. The machined top of the frameplates has to sit tight up against a machined surface on the stretcher. With the stretcher upside down, gravity ensured that the frame plates were tight up against the stretcher. We also fitted the circular frame stays at the front and rear ends of the frame plates. After the photo was taken, the AWS receiver stay was also fitted. Everything is secured at this stage with temporary bolts. Next week, we will double check that everything is aligned correctly before proceeding to fit the permanent fitted bolts
   
Cannon axle inspection.
02/08/2022
  Highslide JS
  Our first cannon axle has come off the Jurrista machine centre at CTL Seal and is on the inspection table. The roller bearing goes inside the 10'' bore which is machined to an accuracy of +/_ .001''
CTL's Paul Parker has just measured the axlebox with a Faro Arm, which is a portable Coordinate Measureing Machine. We will get a full set of dimensional records as part of the Manufacturing Record Book.
This is not the final inspection as the axleboxes will be going onto another machine for finaishing and then they will be inspected again.
   
Bogie Cannon Axleboxes
27/07/2022
  Highslide JS
  One of the bogie cannon axlebox castings is now on the big Juaristi machine at CTL Seal for the final stage of machining. Once the castings were received from the foundry, the first machining stage was to machine the surfaces for the manganese steel face and side liners. These provide a hard wearing surface where the axlebox moves up and down inside the axlebox guides bolted to the frames. Next stage in the process was to weld the manganse steel liners to the axlebox body. At this stage, the liners are over size. The final stage - shown here - is to complete all the machining work including machining the manganese steel liners down to the correct profile. Other work will be end facing (for the end covers), machining the internal profiles and drilling out mounting holes and the holes for the drain and vent plugs.
   
Bogie Frame Plates - Chamfering
25/07/2022
  Highslide JS
  Machining of the bogie frame plates is now complete. The last job before we start a trial assembly is to lightly chamfer all of the bolt holes. This removes any burrs and ensures that the faces of the bolts and nuts will sit firmly against the frame plates. Here Ian Henderson from SSLC uses the small magnetic drill and a countersink bit to chamfer the holes. Compare the bolt holes to the left of the drill with the ones still to be done on the right. Photo by Chris Jones
   
Internal cannon box components.
19/07/2022
  Highslide JS
  Update 18-07-2022. We have now collected all the 100 plus internal components for the front bogie cannon boxes, these are now being checked and measured. Here is a photo showing some of the smaller items.
The long bolts pass through the body of the cannon box and secure the end covers. The heads have holes so that they can be wire locked in position.
The smaller items are the drain plugs. These were introduced as a modification in April 1954; the slot in the centre allows the drain plug to be loosened and for a sample of oil for testing to be obtained without loosing the entire contents. Sample of oil in this sort of area can detect any early symptoms of damage or wear.