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I am in the process of attempting to repair an article, initially by creating a drawing both of the broken part. In doing so, I have come across a 6000RS bearing, nominally 26 x 10 x 8, whch is a very sloppy fit in it's housing. I suspect the sloppiness is because the housing itself, made of cast iron, appears to have been worn away, measuring 26.5mm, but on measuring the bearing I find that the measured OD is 25.98/25.985 and the measured thickness is 7.96/7.97mm. I have used two micrometers and two dial calipers, thus taking four measurements for the diameter and the thickness, and all fou...

I am making a DTI holder from drawings by Stefan Gotteswinter. He specifies that some of the parts should be hardened and, presumably, tempered. These bits (not finished yet) are made from 01 Tool Steel, I am pretty confident I can harden them by heating with a torch then quenching in oil but not so sure how to go about tempering - or if that is even necessary? I understand the principle of reheating and watching for colour change but that usually seems to be done on larger parts where the heat can be applied at one end and the colour change observed as it migrates up the part. These are only...

People, this is nothing to do with politics, it is to remark that facebook have blocked many Australians from vital services such as bushfire, floods and covid updates as well as protection services such as domestic violence websites, Facebook in Australia Next it might be you. All because they were asked to pay for content that was plagiiarised from Australian websites. I have no idea why my original post was blocked but common sense seems to have prevailed. I thought that was what the Tearoom was all about, to comment on non model engineering matters that might affect us all and facebook ...

Good morning people, Recently one of our children has given us a device known as Portal and which is produced by Facebook, the idea being to assist communications between ourselves and our children & grandchildren. And in this it works very well, is easy to use, and seems far better than Skype. It works by connecting to our home network by wifi, and hence to the internet via high speed broadband. But, I do have a nagging suspicion about Facebook. To put it bluntly, I don't trust them to not use the access onto the home network to start snooping around my computers, and let's face it, these Am...

Headlights steer me towards Lamborghini, but there does not seem to be a match for the rest of the car. You used to be able to but accessory vents like those in the rear quarter, but I can only remember them in sets of 6 all the same size. You could buy them from accessory shops and even from catalogues like Kays, John Noble etc etc but they usually ended up in the front wings of Consul 375s or early Zodiacs. Still puzzled because something is soooh! familiar, but I just can't put my finger on it. Tried to blow up the image to see what the logo on the wheel is but no joy there.