Author Topic: Boxford travelling steady (Read 15073 times)

doubleboost · « **on:** October 11, 2012, 04:28:24 PM »

Hi
Lads
I have been buisy making a new Z axis screw for my mill
I have had problems with the screw bendind the deeper the threads are cut
The traveling steady Boxford supplied is totally useless for the job intended
It is just something to put in the cupboard with the rusty change wheels

Before i scrap any more stainless round bar i will make a new steady
It will be a bronze casting (aluminium is not strong enough and cast iron takes to much melting)
On with the pictures
Wood patern

The Boxford item showing SLOTTED mounting holes

It ends up in the middle of no where

I hope to get it cast this week end

John

krv3000 · « **Reply #1 on:** October 11, 2012, 05:31:41 PM »

thats a nuther one out of the way john as per work well dun

John Stevenson · « **Reply #2 on:** October 12, 2012, 03:57:59 AM »

John,
Traveling steadies are a pain in the arse.They either fit at the front and lead the tool and get in the way of any registers etc.
Or they fit at the rear and trail the tool and get in the way of centers etc

I have three different models for my CVA and not fit correctly, they are all to far in front, to far behind or just get in the way.

Best design i have ever seen on a machine especially made for doing Raglan lead screws was two steady brackets, one back, one front which carried two bars sandwiched between them.
The steady fingers were attached to these bars.

That made it so that they could slide along the bards to where they were needed best and also tilt to accept different diameters.

John S.

It's the only adjustable traveling steady I have ever seen

PekkaNF · « **Reply #3 on:** October 12, 2012, 07:20:29 AM »

Quote from: John Stevenson on October 12, 2012, 03:57:59 AM

John,
Traveling steadies are a pain in the arse.They either fit at the front and lead the tool and get in the way of any registers etc.
Or they fit at the rear and trail the tool and get in the way of centers etc

I have three different models for my CVA and not fit correctly, they are all to far in front, to far behind or just get in the way.

Rant continues:
* And fingers are too soft, grip the freaking thread you are making and move the cacadodle towards spinning chuck even after you have disengaged halfnuts...
* And fingers are too hard and dragmark my shiny objects of pride.

Quote from: John Stevenson on October 12, 2012, 03:57:59 AM

Best design i have ever seen on a machine especially made for doing Raglan lead screws was two steady brackets, one back, one front which carried two bars sandwiched between them.
The steady fingers were attached to these bars.

That made it so that they could slide along the bards to where they were needed best and also tilt to accept different diameters.

John S.

It's the only adjustable traveling steady I have ever seen

Any change for a picture or C-O-C? I imagine cheeck plates fitted both sides of gross slide, but not on the moving part - and the bridge holds fingers?

BTW. in which angle these fingers should be radially? I see so many traveling stady looking objects I'm allready all mixed up.

Pekka

doubleboost · « **Reply #4 on:** October 14, 2012, 04:30:59 PM »

Hi
Lads
I managed a bit of casting today

The invisible tool holder

This is why you need a riser block on a 626

John

saw · « **Reply #5 on:** October 14, 2012, 04:32:36 PM »

Nice work

Stilldrillin · « **Reply #6 on:** October 15, 2012, 03:47:06 AM »

Very nicely thought through, and shown John!

NOW, I understand why you needed the mill, height extension.........

David D

PekkaNF · « **Reply #7 on:** October 15, 2012, 05:27:49 AM »

Very nice. Hardly can wait to see it mounted and ready.

Pekka

doubleboost · « **Reply #8 on:** October 16, 2012, 05:06:18 PM »

Hi
Lads
Got a bit more machining done tonite

I turned down the heads of the cap heads to be a tight fit in the counter bore
They work like a "fitted bolt"

That wont move like the original one

Tool on center height gave me a good scribe line for the rear finger

John

Stilldrillin · « **Reply #9 on:** October 17, 2012, 03:51:14 AM »

That will be rigid John! No built in, wobability factor there......

I like your idea for the tool height/ centre line scriber, too!

David D

doubleboost · « **Reply #10 on:** October 18, 2012, 04:05:19 PM »

Hi
Lads
Got a bit more done
I forgot to cast some flat bar for the fingers :slaphead::slaphead:
But i had this big riser from my cylinder casting

A lump was sawn off then machined flat

I managed to get both fingers from one slice

I have left the fingers as long as possible so i can use both ends
John

DaveH · « **Reply #11 on:** October 18, 2012, 06:19:42 PM »

John,

Very smart

looking good

DaveH

micktoon · « **Reply #12 on:** October 18, 2012, 06:49:25 PM »

Coming along fine John

, what an improvement from the original one

, just thinking you could have had roller bearing on one end of the finger and normal other end ............. ummm then again just have two sets a steel one with roller bearing maybe ? .............. Anyway quality job and all 'home- grown'

RotarySMP · « **Reply #13 on:** October 19, 2012, 09:05:37 AM »

Nice work.

doubleboost · « **Reply #14 on:** October 22, 2012, 04:58:23 PM »

Hi
Lads
Made a start on the mill feed screw again
I centerd the stock 1 inch stainless
It had a run out of 15 thou in the middle (slight bend)
I set up my new steady (the steady was trailing the tool)
set up a 20 thou cut (10 ether side)
It took about half a hour to complete the cut at a nice slow speed
The bar is now straight (or the clock is broken)

The diamiter is within 1 thou over 24 inches
Now the pictures

John

Rob.Wilson · « **Reply #15 on:** October 22, 2012, 05:02:44 PM »

crackin steady John

saves me making one

Rob

doubleboost · « **Reply #16 on:** October 22, 2012, 05:26:02 PM »

Yours is in the pot mate

Just need to make a hole in the sand and pour it out

John

Rob.Wilson · « **Reply #17 on:** October 22, 2012, 05:30:56 PM »

well get it pored then

Rob

NickG · « **Reply #18 on:** October 22, 2012, 10:25:03 PM »

Nice work John,

This is a bit weird - I woke up at 1:30am thinking I wonder whether I could make / get made some new feed screws and nuts to make my Chinese milling machine more accurate... then I found this post!

What was the boxford steady doing?

Nick

Stilldrillin · « **Reply #19 on:** October 23, 2012, 02:22:34 AM »

Perfect result John!

Well done, and shown.......

David D

micktoon · « **Reply #20 on:** October 23, 2012, 05:02:18 AM »

Quality post John

, well done and explained too

, its turned out really well and looks like its solved the problem you were having.

Cheers Mick

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Author Topic: Boxford travelling steady (Read 15073 times)

Rob.Wilson

Rob.Wilson