Thread Restoration

[Anorak Bob]

The Tough wood lathe I recently acquired has a through spindle threaded both ends. The outboard end is 1" x 10 LH. The thread looked like it had been the recipient of a number of hammer blows. I could have simply cut the damaged threads off but decided to have a go at removing the damage buy setting it up in the Hercus and carefully turning the flared and crushed sections off.

Picking up the thread was easy enough with a loupe but I was not prepared to risk accidental mutilation of the thread by turning the lathe under power. I had made up an expanding mandrel years ago and when installed in the spindle and fitted with a crank handle, makes hand turning easy. I was able to very carefully pare away the damage on both sides of the thread vee and to only remove small sections of damage around the thread circumference. Hand thread cutting allows the prevention of the overzealous too deep a cut. Also allows the stopping of a thread mid cut without disaster.And also enables the threading to a point and not a runout groove. Takes longer though.

The Tough spindle was pretty rusty both inside and out. I happened to chance upon a twisted brass bristled brush at a hardware not owned by Wesfarmers. It was in a box of specials for $1.50. Tailstock mounted, it quickly cleaned up the bore which I finished off with a 2 Morse reamer.

BT

[C-47]

Bob,
Well done. The cleaner look like it might have been for the 12 gauge. Alan.

[shedhappens]

Nice job Bob, forethought and patience are a virtue.

Cam lock chucks make it so much easier, turn the tool upside down and cut the thread the other way.

I love the handle and now I need one for my Hercus :doh:

john

[Anorak Bob]

Bob,
Well done. The cleaner look like it might have been for the 12 gauge. Alan.

Hey Alan,

I actually bought a 12 gauge bore cleaning brush from none other than Roy ( himself ) Alexander down in 8th Avenue, Maylands. The intention was to use it in the Hercus spindle bore. It required a handle that I never made. :doh:
Bob.

[Abratool]

Bob
I like the handle idea for picking up threads & repairing them. Well done :)
I had a job like that a while back, recutting a metric thread on the imperial 260 lathe & had to pull the spindle around by hand from the rear drive pulley. It meant holding the tongue in the right place so that there were no stuff ups. It was a tedious job.
Theres another job, to make up a crank handle. That would simplify things a lot.:2tsup:
regards
Bruce

[Ueee]

Hi Bob,
Looks like another great idea from you.....just wait till your turning timber, its nothing at all like steel! Now not only will we be ogling your metalwork pics, but those beaut handles on your tools too!

I would say by now officially Aus post is slower than royal mail....i didn't think that was possible!

[welder]

I would say by now officially Aus post is slower than royal mail....i didn't think that was possible!

That's definatly true I bought some taps from the uk paid Friday night and they arrived at my door first thing Tuesday morning :oo:

That's a neat job on the lathe spindle Bob I especially like the drive handle :2tsup:

[Log]

Nice repair:2tsup: Anorak Bob, some times person powered turning just fits the bill nicely.
On your rear toolpost, what is the gismo on the right side of it, looks interesting:D.

Cheers.

[Anorak Bob]

Nice repair:2tsup: Anorak Bob, some times person powered turning just fits the bill nicely.
On your rear toolpost, what is the gismo on the right side of it, looks interesting:D.

Cheers.

A knurling tool Log. Here it is ready for play.

[Anorak Bob]

Pretty simple. Based on a Dynabolt. The bits are glued together with Loctite. All 1214 excluding the turned down cap screw. 1214 because it is softer than the 1045 spindle. The handle is a Hercus T42, filed and polished so it could be turned comfortably. It couldn't be when I bought it. The handle is readily detachable, a real benefit.

BT

[Dave J]

Nice job Bob, :2tsup::2tsup:
While I was reading it I thought it sounds so easy in words, even though it's not a big job it does take time to set up to get it spot on.

Dave

[Ueee]

Hi Bob,
Nice work as usual, is there a chance we could have some details of the knurling tool? I was planing on making the one out of Halls book but yours looks far more robust. I also like the look of your handle adjustment teeth, is it sprung like the commercial ones or does gravity do all the work?

[Dave J]

That's definatly true I bought some taps from the uk paid Friday night and they arrived at my door first thing Tuesday morning :oo:

That's a neat job on the lathe spindle Bob I especially like the drive handle :2tsup:

I hope it's quick from the UK at the moment as I am waiting on 1500 grub screws to arrive.

Dave

[Anorak Bob]

Hi Bob,
Nice work as usual, is there a chance we could have some details of the knurling tool? I was planing on making the one out of Halls book but yours looks far more robust. I also like the look of your handle adjustment teeth, is it sprung like the commercial ones or does gravity do all the work?

Gravity Ewan.

This was one of my first projects using my little Hercus No.O mill maybe 8 years ago.

The wheels are made in England by WDS, the axles are 1/4" dowel pins. The rest is 1214 and 1020. I had posted these photos a couple of years ago and I just wasted half an hour looking for that post.:doh:

BT

p.s. No sign of the arbors yet.

[Dave J]

Hi Bob,
Nice work as usual, is there a chance we could have some details of the knurling tool? I was planing on making the one out of Halls book but yours looks far more robust. I also like the look of your handle adjustment teeth, is it sprung like the commercial ones or does gravity do all the work?

I wouldn't mind seeing Bobs knurler also.
I just finished making a scissor one yesterday, but it's a bit backward's to what everyone else makes them. I usually only knurl aluminium and the odd bit of steel, so a push has bee fine for me over the years.
The tool post tool holders I am making needed knurled height adjusters and there is 46 of them, so I decided to make a scissor one to save my lathe cross slide screw and bearings.
I was going to leave them plain with no knurl, but then kicked myself for being lazy,:~ though after a few days spent making it , I was wondering about that, LOL
I will post mine up tomorrow and it might give you some other ideas.

Dave

[Dave J]

You posted while I was righting Bob, thanks for the pictures.

Dave

[BobL]

That has to be nne of the nicest knurlers I have seen.

[Dave J]

I agree BobL,

Bob can you tell me the story behind the 2 piece handle arrangement?

Dave

[Anorak Bob]

I agree BobL,

Bob can you tell me the story behind the 2 piece handle arrangement?

Dave

Thank you Boys.

The castellated adjuster came about due to a desire to have a handle that could acheive considerable leverage along with being positionable away from the work or chuck. I could have used a spanner with the same result but the adjustable nut seemed a bit neater.

The tool works well on 4140 but I have to really wrench on the handle to get a nice deep cut. Some people use knurled handwheels on their adjusters. I think they would be struggling with something tough like 4140.

In reality I think most of the tool is 1020. If I had used leaded steel the thing would be covered in a rusty haze by now.

Bob.

[Ueee]

Thanks Bob,
I did do a search through your posts but came up with nothing either:no: I did find many other things to keep me occupied though. The toolbox made by the piano maker is fantastic!
LiveLeak.com - Best tool chest ever! (http://www.liveleak.com/view?i=710_1301768433) for those who missed it.

I was thinking about making a few drop handles for Freddies's table support, but ones like you have made would be better, but i will probably add a spring as gravity doesn't work so well sideways......

[Anorak Bob]

Thanks Bob,
I did do a search through your posts but came up with nothing either:no: I did find many other things to keep me occupied though. The toolbox made by the piano maker is fantastic!
LiveLeak.com - Best tool chest ever! (http://www.liveleak.com/view?i=710_1301768433) for those who missed it.

I was thinking about making a few drop handles for Blondie's table support, but ones like you have made would be better, but i will probably add a spring as gravity doesn't work so well sideways......

Now you know why I bought a woodie's lathe.:U

[Dave J]

Thank you Boys.

The castellated adjuster came about due to a desire to have a handle that could acheive considerable leverage along with being positionable away from the work or chuck. I could have used a spanner with the same result but the adjustable nut seemed a bit neater.

The tool works well on 4140 but I have to really wrench on the handle to get a nice deep cut. Some people use knurled handwheels on their adjusters. I think they would be struggling with something tough like 4140.

In reality I think most of the tool is 1020. If I had used leaded steel the thing would be covered in a rusty haze by now.

Bob.

Thanks Bob, I thought thats what it was for, but wasn't 100% sure as sometimes you slip in a little trick or two, LOL

Mine works easy as I have the thread on the end with the knurls in the centre, more leverage that way.
Also what size will it do, the one I just made will do 0 to around 55mm.
I looked all over the net last week looking for something simple, but most rely off the pivot points which could get sloppy. I went with a block type design something along the lines of what you have done, which stops any side way movement..

Dave

[Dave J]

I forgot to add, you really did a nice job on that, mine doesn't look as pretty as it was a rush job just to do these adjusters. I see you have a Dickson style tool post as well, I have just finished 46 holders and am waiting for the grub screws as they are much cheaper than buying 184 square headed bolts.
The metric 8 where $177+ post per 100.
https://www.bolt.com.au/m6-30-square-head-case-hardened-cup-point-set-screws-p-10287.html

For $110 AU I got 1500 grade 14.9 grub screws from the UK posted as they where $50 a box of 100 here.:o

Dave

[issatree]

Hi Bob,
Hey, while you have it in pieces, re drill the Indexing holes in the Cast Iron Pulley.
The Spring Holder on the outside, has a Small Pin. I replaced mine, with a 1/4in. Pin.
I am now able to lock the head, to tighten up my Nova Chuck, with a piece of wood in it. Works a dream. I realise, you are not supposed to do that, but mine has never let me down yet, & that was done years ago.
Most likely try to tell you how to suck eggs, but the 2 x 3in Red Plates of course hold the Bearings. Mine have a Plastic Cap, that is removable, & I use Molycote to grease them.
Hoping this helps a little.

[Log]

A knurling tool Log. Here it is ready for play.

Thanks for the pic and the others you posted. It's a nice robust knurler and the arms are located very well:2tsup:.

My purchased, relatively cheap:rolleyes:, scissor knurler that I use ocassionally on my 9x20 has fairly loose arms that push over to the side when traversing along the job.:(. On the bigger lathes of course I use conventional knurls, but a nice robust scissor knurl like yours would be real good on the bigger lathes when one has to knurl a slender job.

I've stored the pics of yours in my vault of worthwhile and interesting do-dads, gismos, thingamabobs, dooverlackies and nice shiny things.:D:rolleyes:

Cheers.

[Anorak Bob]

Hi Bob,
Hey, while you have it in pieces, re drill the Indexing holes in the Cast Iron Pulley.
The Spring Holder on the outside, has a Small Pin. I replaced mine, with a 1/4in. Pin.
I am now able to lock the head, to tighten up my Nova Chuck, with a piece of wood in it. Works a dream. I realise, you are not supposed to do that, but mine has never let me down yet, & that was done years ago.
Most likely try to tell you how to suck eggs, but the 2 x 3in Red Plates of course hold the Bearings. Mine have a Plastic Cap, that is removable, & I use Molycote to grease them.
Hoping this helps a little.

Hello Issatree,

The indexing plunger on my Tough has had the point ground off. I imagine this was done to prevent accidental engagement by some disinterested schoolkid. There were two other Toughs at the place where I bought mine, both had their indexers removed.

I will have to make an entire new assembly because I reckon the point and the knurled handle have been pressed together. I did think the indexing holes in the pulley seemed a bit small. How were you meant to lock the spindle for chuck removal if didn't use the indexer?

The bearings in mine seem to be in good nick. They have plastic shields. I'll pop one off and have a look inside.

Bob.

[Anorak Bob]

I forgot to add, you really did a nice job on that, mine doesn't look as pretty as it was a rush job just to do these adjusters. I see you have a Dickson style tool post as well, I have just finished 46 holders and am waiting for the grub screws as they are much cheaper than buying 184 square headed bolts.
The metric 8 where $177+ post per 100.
https://www.bolt.com.au/m6-30-square-head-case-hardened-cup-point-set-screws-p-10287.html

For $110 AU I got 1500 grade 14.9 grub screws from the UK posted as they where $50 a box of 100 here.:o

Dave

I have to ask Dave, how come so many holders? I have 8.

BT

[Stustoys]

You havent lost your marbles yet Bob

http://www.woodworkforums.com/f65/your-latest-project-121056/index11.html#post1272160

Stuart

[Anorak Bob]

You havent lost your marbles yet Bob

http://www.woodworkforums.com/f65/your-latest-project-121056/index11.html#post1272160

Stuart

How did you find it Stu?

I searched for Knurl, Knurler, Scissor... then started wading through 57 pages of my posts before I chucked it in. Would have saved me a lot of rooting around resizing photos last night. As it was, it was past my bedtime whenended up posting a reply.

You posting that just shows how much I have forgotten. :doh:

BT

[Dave J]

I have to ask Dave, how come so many holders? I have 8.

BT


I have 6 and am sick of having to change them over all the time. I had a piece of 32mm plate here for years that I was going to make them from, and after cutting them up thats how many I got out of it.
I made 10 blanks for those one off jobs etc, but about 4 of those are destined to boring bar holders, 1 a dial indicator, and one a threading tool holder.

I remember you knurler now (I even commented on it, LOL) but had forgotten about it.

Dave

[Stustoys]

How did you find it Stu?

Search this forum
Advanced search
key words knurl
user Anorak Bob
Three to choose from
Search this thread
advanced search
key words knurl
user Anorak Bob

[issatree]

Hi Again Bob,
The Pin in my Indexer broke off, so I just took it off the Lathe & drilled it out. I think I used a Cement Nail ( damn hard. )
If I remember correctly they are " Timkin " Bearings.
When my Lathe is Running, it is mainly on 3000 RPM. It has never let me down & has done absolute Hours of Work. Now that it is Variable, it is even better.