Scary week with the K&T mill

[jordhandson]

Hi all what a beautiful day today spring has well and truly arrived.

I had a bit of a scare in the week with the K&T mill one evening I thought DRO is on its way I would see if I could remove some of the 85thou backlash on the Y feed.On further investigation I discovered a broken cross feed bracket, oh no


did a some research on removing the table feed shaft and the cross feed threaded bar and how to get the cross feed bracket out, after some head scratching and watching a few vids they were out,


man its always scary taking things apart when you know there is no replacement parts available I had it out Tuesday or Wednesday evening not sure its been a stressful week.


With it out on the bench I could see whats whats, missing locating dowel and broken bracket where the bolt goes through allowing the bracket to pivot, right lets give it a clean in the parts washer, disassemble the whole thing and lets see what we can do with it.




Cast iron clean- ish brake so it shouldn't be to difficult, lets grind out a good vee



give it some pre heat and away we go, grind out a few imperfections and re weld and hey presto job done,


panic over slap on some Colchester green I had left over from the lathe paint.

will refit next

 

[pressbrake1]

Most common bracket to break on any knee mill with offset crossfeed screw.
Good work

 

[jordhandson]

Friday refit the cross feed nut and shaft looks in good condition with very little ware Friday night all back in and working good.




Friday eve viewed Abom79 video on how to set or trim the gibs on the K&T mill great stuff that's Saturdays job.
Great start today had all the rubbish out into the incinerator emptied the metal bucket in the scrap bin had a good sweep up got the coffee on and settle down to sorting out the gibs, oh I forgot that 85thou backlash on the cross feed is now only 12thou result. back to the gibs took me approx 2 hours following the video instructions, good results I can move the table from full movment from one side to the other with the dial indicator on the table and only have 1.5thou reading. I spent the whole afternoon on the fully serviced ride on mower cutting grass in the sunshine, there something quite relaxing cutting grass, sweet.

Something I dont normally do but I topped off the week by bagging a bit of memorabilia



Have great weekend all

Jord

 

[jordhandson]

Most common bracket to break on any knee mill with offset crossfeed screw.
Good work

Scary I red on one of the yank forums some guy wanted 750 dollars for one I had in my head I was going to have to make one but in the end sorted it

 

[frank horton]

was told to use stainless rods for repairing cast with a stick welder ??? true or not ??????

 

[pressbrake1]

was told to use stainless rods for repairing cast with a stick welder ??? true or not ??????

True

 

[jordhandson]

was told to use stainless rods for repairing cast with a stick welder ??? true or not ??????

Dont know about them I used Soudometal Soudofonte c rods they have a high nickel content

 

[Hopefuldave]

was told to use stainless rods for repairing cast with a stick welder ??? true or not ??????

I've used the nickel rods (seriously spendy) and peened while still bleeding hot, heard stainless works too, but in future I'd probably braze if I had to?

Dave H. (the other one)

 

[pressbrake1]

I like nickel rods, will use stainless if I’m stuck but doesn’t seem as successful on old iron.
Low hyds work as well

 

[Bill Edwards]

was told to use stainless rods for repairing cast with a stick welder ??? true or not ??????

It's wrong.

Cast iron wants welding with rods for welding cast iron, they have a very high nickel content. There are two types, one for welding cast iron to itself and one type for welding cast iron to steel - these are cheaper but do not work for cast iron to cast iron.

It's usually best to keep the part cold and the weld metal must be peened while it cools.

Stainless/dissimilar rods are good for almost everything but I believe there are reasons why it's rarely successful on cast iron, always go for the correct (and expensive) high nickel rods.

 

[jordhandson]

Just noticed I didnt have he shift key down on the keyboard the post heading should read

Scary week with the K&T mill

any way I can edit it,

 

[HughF]

Just noticed I didnt have he shift key down on the keyboard the post heading should read

Scary week with the K&T mill

any way I can edit it,

I have asked a moderator to look at changing it for you

 

[jordhandson]

Cheers HughF have a good day

 

[jordhandson]

Thanks HughF and the Moderators for correcting the title