Updated: First published December 2020
After making some tank bolts for the W/NG, I thought I would make a start on all the missing fasteners for the Model A. After all, I like turning and I'm a bit fed up with welding after the QR50 exhaust. I'll need:
- 2 off E1/58 special bolts for the rear stand. I have the 1/2" Thackeray washers to go with them. E1/58 was renumbered to 5505-26, which is used on the W/NG and many other Ariels. I can copy these.
- 1 off E8/245 petrol tank bolt, like the one I made here.
- 2 off E8/921 special bolts for the rear mudguard stays, with their nuts. The bolts look like Ariel parts 5655-30, which is used on the W/NG so I can copy these; their nuts, E8/922 are not the same so I will have to find out what these look like. Looking around the reference pictures I have, it appears the hex size on these matches the stand bolts, whilst the hex on the W/NG ones is smaller and matches the bolt they attach to.
- E8/762, the big nuts for the top of the oil tank. These are different from the later ones as used on my W/NG and SQ4, because the oil tank bracket has a smaller hole as does the sidecar mount in the frame and the later nuts would not fit. E8/761, the stud that goes with this nut, was renumbered to 0182 and is a standard Ariel part. It's a 5/16" CEI x 1 15/16" stud.
- The lock nuts for the chain adjusters, E8/925 renumbered to 5744-30 and the the chain adjusters themselves, E8/924 renumbered to 5740-30. Both of these are used on the W/NG so I have patterns I can copy for these.
I'm making a start with the stand bolts, since I have the Thackeray washers, the stand and and the springs. All these bits will get lost if I don't make the bolts and get them attached to the bike.
I'm starting with a bit of 0.82" hex in EN1, since I will be chemical blacking these and don't want to use stainless. In this picture I have turned the 1/2" OD register for the washer and the 3/8" major diameter for the thread
Last thing on the list is the chain adjusters. The nuts are first, and these are made from a bit of 0.445" hex in the lathe. They have a short 5/16" BSC thread inside, and most of the outside is plain: