Harrison140

[Tigman]

Looking a whole lot better now , wired it up and away , she's running lovely , still got some rust to remove on the tray but very happy with it !

 

[Gareth J]

Nice. How does wear in the ways and backlash in the screws feel?

 

[Tigman]

None too shabby , I've yet to have a good go at it , will let you know !

 

[Tigman]

No backlash on cross slide , but compound has a bit , must be adjustment somewhere ? , ways seem ok , no visible wear that I can see , only problem I have is the speed levers on top have no ball bearing and spring in so don't locate very well ! Need to havexa look at those .

 

[Gareth J]

No backlash on cross slide , but compound has a bit , must be adjustment somewhere ? , ways seem ok , no visible wear that I can see , only problem I have is the speed levers on top have no ball bearing and spring in so don't locate very well ! Need to havexa look at those .

There's adjustment on the wearing bits. Gib strips on the ways and slides and the ability to expand the nuts of the screws to take up backlash.... However, wear won't be uniform so, unless you get very lucky, perfect adjustment won't be achievable, to a lesser or greater extent things will be loose in the middle and tight at the ends. The degree of tight-loose-tight as you traverse the length of a travel is a crude indicator of wear, before you can set up to measure things.

 

[Tigman]

I will have a play around tomorrow, if I get 5 mins to myself !

 

[Tigman]

I've got a problem with the crosslide the 2 bolts that lock down the crosslide angle are knackered , so I stripped it all down and tugged the studs out , the threads are stripped , so I need to replace them , would a knurling tool give me the splines on the end ?, I haven't got one so need to pick one up , are there types of knurl or am I barking up the wrong alley , how can I get the right pattern on these ?

 

[RobCox]

I made myself some straight knurling wheels a while ago to knurl some adjustment screws on a jig I was making. I used them in my scissors knurler - rather unsuccessfully. Instead of both wheels tracking they produced a double tracked knurl, probably down to my technique of tightening the knurler before starting the lathe.

In the end I decided it would be quicker to just cut the knurls on the adjustment screws as if they were gear teeth (same technique as I used for making the wheels above), using a dividing head on the horizontal mill with a 90 degree cutter. They turned out fine.

At least this technique would guarantee the same number of knurled points around the circumference so they would press back in to the cross slide easier.

 

[Tigman]

I have a rotary table on the mill , I will take a look at that idea , thanks

 

[Pete.]

I've got a problem with the crosslide the 2 bolts that lock down the crosslide angle are knackered , so I stripped it all down and tugged the studs out , the threads are stripped , so I need to replace them , would a knurling tool give me the splines on the end ?, I haven't got one so need to pick one up , are there types of knurl or am I barking up the wrong alley , how can I get the right pattern on these ? View attachment 409964 View attachment 409965

Straight knurl. If you get the correct thread bolt and turn the head so it's a light press fit then put any kind of knurl on it, it's going to hold in just fine. In fact if you knurl too heavy it'll risk damage so go easy.