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Build Diary entries for August 2022

Here are the diary entries for this month. You can use the forward and backward links to see the next or previous months. Most photos taken before 2018 are small size. From 2018 onwards, most photos you see below will have a link to a full size image by clicking on the photo.

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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 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