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Machines, Tools and Fixtures / Re: indexable lathe tools
« Last post by john mills on Today at 12:39:44 PM »
check that when you do the stew up the insert feels tight  ,don't go past the centre.sound like the insert ,the tool holder ,and screw don't match .For what you are doing a piece of high speed steel ground to a suitable shape would work .
From Plans / Re: Muncaster Grasshopper - Work in Progress
« Last post by kvom on Today at 12:33:57 PM »
The fixed stays are all of this form (see photo).  The round ends will have a 1/2" diameter with through hole 1/4".  The connecting shaft will be 3/8".  If I assume that each will be assembled from 3 separate parts then a jig of some sort is needed to hold the ends apart the appropriate distances.  There are 3 pairs needed with different lengths.  The cross holes must be parallel of course.
Introduce Yourself / Re: New member living in Germany
« Last post by b.lindsey on Today at 11:37:33 AM »
Nice work on the engine and tooling as well George.  Thanks for showing the pictures.

From Kits/Castings / Re: A Robinson from rejects.
« Last post by Alyn Foundry on Today at 11:11:25 AM »
Good morning Ray.

I've looked at many Robinson's over the years, never seen one with a tap or plug for draining.

Perhaps it was deemed unnecessary by the makers due to the environment these little work horses were placed in.

Being so compact my own engine is fixed to a fairly small wooden base that can be tipped over to drain the tank. That base was made 18 years ago and supported 103 at the Millennium N.A.M.E.S. show in the USA.

Cheers Graham.
Your Own Design / Re: Longboy's "INTERNAL BREEZE" Model Engine.
« Last post by Perry on Today at 10:33:10 AM »
I'm really looking forward to see this one runing :popcorn:
Machines, Tools and Fixtures / Re: indexable lathe tools
« Last post by Jasonb on Today at 10:31:33 AM »
Should not have a problem on such a small piece or big bits for that matter will wait for the pics
Machines, Tools and Fixtures / Re: indexable lathe tools
« Last post by Gary Brooke on Today at 10:23:30 AM »
Thank you lady and gents for your advice plenty to look at there.
A bit more information its a wm 180 lathe nearly new the slides are solid with no play as for the tool it came with the lathe so ive no idea of the quality or tip.
The job is to face to length 3/8" square EN1A not critical that they are all but it would be nice. depth off cut 5 thou speed 750 ish rev and feed  ing in at asteady rate. Ill post some photos when cameras charged.
Rgds Gary
Introduce Yourself / Re: New member living in Germany
« Last post by Jasonb on Today at 10:15:29 AM »
Welcome to the forum George, looks like an Elmers No 4 to me that you are making good progress with.
   Not quite sure what Jo refers to as a "pot chuck".

:headscratch: a selection of my Pot chucks... these have a wide slot in the side for machining ball handles. Basically they are a piece of steel turned up into a top hat that is used in a three jaw chuck. Think of them like collets or soft jaws but without all the expense :paranoia:

I don't mind using castings .holding spigots  still have to be cut of and the part finished.i have done these by holding by the cylinder spigot in the three jaw chuck  but also by machining a recess in a scrap piece of material
steel or alloy ,a push fit not tight held with a live centre on a entered pad is enough to finish the od.
the next series of operations that are often the challenge and have to be thought of at the start.Getting location and holding can be difficult to finish if its a casting or bar stock.working from bar can be ok but just different problems to be thought about . 
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