Thread: mill table

Originally Posted by Clubman7

To me the dust nearing the end of his scraping in the video was coming off grey,
Not brown.
Thats not cast iron?

Hi clubman7

the last couple of strokes you do see a little cast come off. this is from the fact that this part is in pretty bad shape like i said it had been lying out side for 2 years. when you get a dent or mark in cast it craters sightly and around the outside of the dint you get a slightly raised area this is where you see a small amount of cast coming from you do need to remove these anyhow if you press too hard you will start to scrape the cast its a feel thing but very easy to get use to. rust is a lot softer than steel. i have used this method a lot and on machines that hold tolerances much higher than a mill with great success
the problem with the stone method and i have used it in the past is when you have areas of rust and areas next to it that are not rusted you still wear the good part to get the rusted part. stones are very non discriminating i also had trouble with the stone rounding off the edges slightly and getting into corners
scraping is a very precise way to remove material you can take off microns or a thou if you want that is why its used for reconditioning machine tools if machtool phil runs another scraping class and you have the opportunity to attend i can highly recommend it

cheers
Harty

Your right.
Anyways best of luck Morrisman.
Will come up a treat either way.

Just had a look at the video.

Those Sandvik scrapers look the go. Where are thet available to buy ?

Mike

Hi Mike
i got mine form our local bearing supplier as they are a sandvik agent machtool phil may be able to hook you up with something as well
if you get stuck i can get one locally and post it to you

cheers
Harty

Originally Posted by harty69

Hi Mike
i got mine form our local bearing supplier as they are a sandvik agent machtool phil may be able to hook you up with something as well
if you get stuck i can get one locally and post it to you

cheers
Harty

OK thanks for the kind offer . I will try the local industrial supplier first, see if they can order that stuff . BJ Bearings are usually pretty good that way , they will help if they can .

Mike

the sandvik part no is 620-25 for the scraper it comes with one insert if you need more inserts I would get them from machtool phil as the sandvik ones where 50 bucks

cheers
Harty