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CABLE “BIRDCAGE” TOOL

If you refer back to the blog post of 14th August 2013 entitled “Under the Wire” you’ll find a piece on making up control cables.

In this I used a crude method of splaying out the end of the inner wire, basic but it does work.

I was recently shown a special tool for doing this which made a better job of doing this. When I went “on line” to find this tool I discovered that it had a ridiculously high price for what it was, just over £123.

Having had a good look at the tool I knew that I could make one for myself, so I got a length of 8mm by 25mm “bright steel” bar.

I cut two 100mm lengths from this, I put them one on top of the other in the drill vice on my post drill, squared them up and put two 5mm holes through them, on the centre line, one each about 20mm from either end. I then opened out the holes on one piece to 6mm clearance and tapped those in other bar to a 6mm thread.

I could then bolt the two bars tight together, hold them in the bench-vice and draw-file one long face to ensure that both bars were dead level.

I took the bars apart and then re-assembled them with a piece of card, about 0.16thou thick, between them, put them back into the drill press vice. I next put a pop-mark, spot-on the centre divide and in the middle of length of the bars, and then another two, one each about 25mm either side of that.

Next step was to drill a 6.1mm hole, 10mm, deep at each pop-mark.

As there are three different cable sizes to accommodate I then extended these through the bar, one with a 1.5mm drill, one with a 2mm drill and one with a 2.5mm drill.

Now comes the crafty bit, A standard drill has a 118° point so each of these holes now had a shallow conical join where the drill size changed. I wanted a deeper cone here.

You can get what is known as a “spotting drill”. This is intended for marking out work, not for hole drilling, and it has a 90° point so I took a 6mm spotting drill and deepened each hole by about 2mm.

That was the main body of the tool made, I dismantled it and discarded what was left of the card.

I now had to make three punches, one for each size of cable.

I cut three lengths of 6mm round steel bar, each about 5 inches long, fired up the lathe and squared off the ends.

I then used the spotting drill and sunk a 90° socket in the end of each, these were to form the cable end into a double conical “birdcage”.

As the diameter of the relevant cage for each cable diameter was different I now needed to form the punch ends appropriately, a diameter of double that of the cable itself was about right. This meant that to achieve this I would need the open end of the conical punch to be that size and I achieved this by cutting a 90° taper onto the end of each punch until its socket was of the required diameter.

To form a cable end I now have the tool body assembled loose, put the cable end into the appropriate bore and nip up the bolts. Because the bore had been made with the card between the bars the bore is undersize and the cable is firmly held in place.

The appropriate punch is now inserted into the larger top drilling and pushed home. The cable can now be slid further up in its bore until it bottoms in the punch socket and it then further in by its own diameter.

The tool is then bolted tight shut and placed in a bench-vice to hold it and the end of the punch struck with a hammer. This forms the end of the cable into the required “birdcage” which will lock it in place when the nipple is soldered in place.

I could have made this up using angle iron to be easier to hold it in the vice but the only “bright steel” angle I could get was either way too big or if in a convenient size only had a 3mm thickness so I had to use the plain “bright” bar.

A Bit of a Hide

Now for something totally different !!.

I have a pair of dogs. Recently, while he was out running loose, the elder one managed to lose his collar.

Since the pup was also outgrowing her puppy collar I decided it was time she moved on to her adult collar and to make up a pair of matching collars for them.

So I went to the local suppliers, LePrevo Leather <http://www.leprevo.co.uk/>, and bought one 2 inch and two ¾ inch straps of a good leather along with four ¾ inch brass “D” rings, two 1 inch brass “O” rings, some copper rivets and two brass trigger hooks.

Once I had the materials next thing was to measure up. What I intended to make was a pair of martingale collars and for these I needed an accurate measure of the dogs neck size, his lordship measured up as being 16½ inches and her ladyship was 14 inches.

Allowing for the size of the “D” rings this meant that his collar leather needed to be a 14 incher while hers was to be 12 inches to allow her room to “grow into it”.

The  dogs  are a pair of standard poodles, poodles are a long-necked dog and as such I prefer them to wear a broad “fishtail” type collar so next step was to mark out the 2 inch strap for this and cut it to the required shape.

Template

Cutting Template

 

A cutting template was made from some stiff card and transferred to the leather, which was then cut to shape using a Stanley knife fitted with a new blade.

Cut leather

Leather Main Body

Next a “D” ring was slipped over one of the “tails” and the “tail” doubled over it. This now needed to be fixed in place and there are two options here, you can stitch it in place or you can rivet it place, as these collars are for a larger dog and have ¾ inch wide “tails” stitching is a better option, for a small dog, and so a narrower collar, using ½ inch “D” rings then in preference I’d rivet it.

Leather is not as easy to sew as fabric is and it needs to have the needle holes pre-punched, you can’t just push a needle through two thicknesses of leather. What is needed here is a “pricking iron”, this looks a bit like a fork and is used to mark out and pre-punch the leather.

Once the thread holes have been pre-punched then it’s just a case of using an awl to open and line up the holes’ and then running the needle through.

When sewing leather it is normally done using two needles, one on each end of the thread, so you then run the other needle back through the other way and pull the thread tight and that’s the first stitch made.

Then you just run the awl through the next holes, follow it with the needles and so on till that stitch row is completed.

For security a second row of stitches was run across the “tail”, a bit nearer to the “D” ring.

"D" Ring

“D” Ring Stitched in Place

That meant the first “D” ring was now in place and all I had to do was stitch up the other three and I had the collar main bodies finished.

The bigger collar was 14 inches long and the smaller was 12 inches and the strap was 46 inches long so I had 20 inches of the strap “spare”

This “spare length” was cut down so as to give two straps, each ¾ inch wide by 20 inches long and one of these was slipped through both “D” rings on one collar.

As this loop was to be riveted closed,  a small hole was punched through the strap length, about a ½ inch from either end and another hole a bit over 1¼ inches from one end.

The strap was now slipped through one of the 1 inch “O” rings, the strap end doubled over the ring. A rivet was then put through all three holes and “set up” to secure it in place.

All that was now left to do was to make up a slider to go over the strap loop and secure it.

Completed Martingale

Completed Martingale

For this a short length of the “spare” leather was doubled over the loop  and the ends riveted in place so that it would slide stiffly over the loop and that was that collar completed,

Slider Fitted to Martingale

Slider Fitted to Martingale

all that was now left to do was to finish her ladyships collar as well.

 Martingale

Completed Pair of Martingales

To complete the “sets” I needed leaders to go with the collars.

For these I had the two strap lengths of ¾ inch wide leather.

I just slipped one end through the loop on one of the trigger hooks, doubled it back on itself and stitched the loop closed. As with the “D” rings I used two rows of stitching to secure it.

Trigger Hook

Trigger Hook stitched onto Leader

To form the handle I doubled the opposite 9 inches of the strap back on itself and secured it in place with another two rows of stitching and that was the leader complete.

Leader set

Set of Martingale and Leader

The idea of these “martingale” collars is that if the dog pulls hard when walking on lead then the collar is pulled a bit tighter round his neck, but, because from the way it is made it can only “pinch down” by about 1 inch on a 16 inch collar so it is uncomfortable to the dog rather than choking it.

It is not meant to be worn continually, it should be kept along with its leader as a set, the pair being put on when the dog is taken out and then removed, as a pair, when you get back home.

As long as the slider is run up to near the “D” rings the dog can be allowed to run loose “off lead” while wearing it since the slider holding the loop closed means the dog cannot get his foot caught in the open loop.

FEMA

There are a number of motorcycling organisations who “Stand Up For Our Rights”.

These are normally national groups and as many of the threats they oppose are international they have joined together to form  an international group.

This “cover group” is FEMA, the Federation of European Motorcyclists Association.

This group has an open website that anyone can access at :-

<http://www.fema-online.eu/website/>

Have a look, check it out every couple of months and keep yourself up to date on what’s happening on the political side of biking.