Broken Cocking Spur

[Stacker Shepherd]

Evening all,

 

I went over to The Priory CTC at Sutton Bridge last Wednesday to check it out, and on my 4th round of skeet my gun decided it didn't want to open up properly. I pulled the forend off and the end of the cocking spur had snapped off .

 

This is a common fault with these guns as the design means there is a lot of pressure against a very small part.

 

The guns a Medalist and spares are pretty much unavailable, which leaves me no option but to make the part myself.

 

This is what the part looks like and where it belongs normally.

 

 

 

 

You can see in this pic it snapped at the weakest point which is very very thin.

 

First thing was to find some decent stock to make the new one out of. I needed something ASAP and had a length of EN16T. It should be ok as its a decent grade and able to withstand quite a bit of punishment. Unfortunately the bar stock is 30mm Diameter and the piece i need to make is 35mm long so it would require lots of material removal.

 

 

I secured the piece on my lathe and rough milled it into a more appropriate block.

 

 

 

 

 

 

You can see in the pic below the spur is concave on the top so i needed to cut this into the new one. I think the radius of the original is about 20mm but the largest ball nose end mill i had was 16 but i just ran it across twice to widen the groove.

 

 

 

 

 

I then cut the 2 grooves apart which means i can make another fairly quickly should i need to.

 

 

At this stage i took one of the blanks to the bench grinder for more bulk material removal. Once i had the width i put a radius on the end to fit the slot correctly.

 

 

 

 

 

 

At this point it was back to the grinder to bring the head into shape and time to drill and tap for the screw that hold it in position.

 

 

 

And Finally the spur fitted in its new home. I polished the the face to reduce friction.

 

 

 

 

 

Ive cocked and dry fired it several times and inspected the spur and it seems to be absolutely fine.

Not a bad days work, just in time for more shooting .

 

Regards

 

SS

Edited April 27, 2016 by Stacker Shepherd

[wisdom]

Brilliant job.Real metalwork skills on show.

[CaptainBeaky]

Colour me impressed

[la bala]

Great read and pics it makes life more enjoyable when you have the material, tools, and ability to make it yourself.

[ditchman]

like that

[panoma1]

Old hand and eye gun smithing skills used on a modern machine-built mass produced gun! The inginuity of man will never be completely superseded by automation......well done that man!

[Stacker Shepherd]

Thanks for the positive comments . There are definitely worse ways to spend a Wednesday.

[figgy]

Well done and a spare for future use.