How to tell if your follower is the newer spigotted type

Here is how you can tell.
Look down inside and if it is the spiggotted type -that will not loose it's pad -then you can see the bronze weld around the inside floor of the follower.

If it just looks like cast iron then it is the earlier type.

How is this for odd.
The followers out of my Mk2a and the set I got off eBay that were sent to you for grinding (no bevels at the face) do not show any sign of bronze but the set out of my 71 750 with the double bevel at the face do show bronze down in that void.

Is there a bronze weld all around the inside or did a little bronze leak through a void in the casting?
As far as I know there were no spiggotted followers built before about 1977.
And they would not be beveled on the front and rear.

I think I was being over optimistic.

Yes will be just a bit of leakage and two of them did not have any but I rounded it up to 4.

I will look forward to your own followers coming onto the market.

Time Warp said:

I think I was being over optimistic.

Yes will be just a bit of leakage and two of them did not have any but I rounded it up to 4.

I will look forward to your own followers coming onto the market.

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I am looking forward to seeing the ones that Andover has had in the works for some time now...

Getting closer, American company with German engineers, not the quickest in the world, the initial cries of easy peasy make them one piece overtaken by some challenges to make something that is compatible with all camshafts, case hardened, chill cast, EN40 and re-worked cams.

To tell if you have a spigot, just use a piece of wire, the spigot portion is roughly the same thickness as the pad piece of the tip you can see.

comnoz said:

I am looking forward to seeing the ones that Andover has had in the works for some time now...

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Hi Jim,
Are not all followers sold by Andover now spiggotted? What does Andover have in the works?

Ed

All the new followers from Andover are spiggotted. [but there are still lots of NOS followers available that are not]
Unfortunately the hardness of the available followers is not always consistent.
The new followers that are reportedly "in the works" are one piece Stellite followers that should solve the hardness problems.

To clarify, stellite in all its variations was considered, and would have been used if all the cams were of the same material, but they are not so it was discounted as no matter what type of stellite used it was either not hard enough post casting, or could not be hardened post casting to the hardness range needed.

Madnorton said:

To clarify, stellite in all its variations was considered, and would have been used if all the cams were of the same material, but they are not so it was discounted as no matter what type of stellite used it was either not hard enough post casting, or could not be hardened post casting to the hardness range needed.

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Telling us what is "not", isn't that much of a clarification. You guys are pretty much our best hope of having an improved part to replace a weak original part. I've had a single follower delaminate on my bike. I heard it happen, shut the bike off, and got very lucky to have no damage. I'm running 4 old non-spigoted followers, so I'm interested in the details of the solution. BTW, thanks for taking this on.

They will be one piece investment cast with a slightly different void space. They material will be a iron based hard facing material with a unique chemistry that will enable a narrow band of hardness 3HRc wide and enable good casting flow.
After testing chill cast, case hardened and nitrided cams the band and hardness level had to be kept from the hardness bands of those cams to avoid similar hardness issues. A stellite welded and refaced cam would not even be near enough either in hardness, the nitrided and chill cast cams created the problem.
Triballoys were also cast but failed the casting test.
The 2 piece process with the spigot though sound, could not give the narrow band of hardness, as an additional process to narrow the the band could damage the braze interface.
To say this has been a challenge to one of if not the planets best hard facing companies is an understatement.