Just a small part, but I'm still at it. Not related but a rear sprocket spindle picture is also included.
email (option): pes.sales@btconnect.com
Yes I'm still doing this. Some brackets I had cut out.
email (option): pes.sales@btconnect.com
More fork parts,
15-5249 Link bolt, bottom front, 8 3/8”
15-5247 Link bolt, bottom rear, 8”
15-5190 Link bolt, top, 5 ¾”
Made from High tensile EN24T steel. The Nut is fitted on a tight thread, before being Nickle Bronze welded before machining a dome.
email (option): pes.sales@btconnect.com
This weekend was supposed to be for more building work on our works extension. Weather put pay to that.
As the Milling machine was empty I thought it was a good idea to make the tooling to machine the fork links.
The first job was the straighten the links, it might have been a better idea before sending them off for heat treatment. Though they could distort during heat treatment. You never know what horror will come back from heat treating.
The reason beyond the obvious for them to be straight is that when clamped in the jig they will not bend. Being spring like the parallelism of the bores will be lost.
So as Anita was machining the links, I was on straightening duty and pin pushing.
Despite our best efforts the parallelism of the pins wasn't perfect. More tweaking required.
Even though these are made to tighter tolerances than would have been achieved by BSA, I feel that these are best supplied in matched pairs.
Also including our high tensile bolts.
This way we can be sure when we supply links, we'll know they look at each other before shipment.
The unthreaded link should slide easily on the bolts as shown in the picture below.
we haven't machined the lower links yet as more tooling needs to be made, but it is progress.
Having case hardened pins and tempered links, these should give a stiffer feel to the bike.
Also have a longer service life than the originals.
The top link set will cost £120.00ukp
email (option): pes.sales@btconnect.com
The top links didn't play as well as the bottom ones. 15-5239 was a right pain. Firstly to straighten, then to jig. Not forgetting another jig to machine the other side. There was nothing I could use as a datum for all axis, so the pin bore has to be clocked up for each one.
If these links sell, I think I will redesign the moulds to make life easier later. At least I have a viable product and not a box of scrap.
I don't have a price for this set, but it will be a bit more than the bottom ones due to the extra work.
There should be 6 complete sets in a couple of weeks once the bolts are plated.
email (option): pes.sales@btconnect.com