New style Andover Norton Tappets

I have not looked at mine for a few years. What is different with these Andover lifters?
 
I am glad I built my hot motor back in the early 80s things were a lot cheaper, I made a jig up and gave my lifters a grind on a surface grinder when I got Ivan Tighe to build up my stock cam to 2S grind still running them today, I have also brought 2 sets of lifters cheap off E bay for $20 a full set each, one set has light wear but the other set don't have any wear on the pads at all, can be lucky sometimes.
I love to build a hot motor using Jim's bits but way out of my price range unless I win lotto, I can only dream lol.
 
ashman said:
I am glad I built my hot motor back in the early 80s things were a lot cheaper, I made a jig up and gave my lifters a grind on a surface grinder when I got Ivan Tighe to build up my stock cam to 2S grind still running them today, I have also brought 2 sets of lifters cheap off E bay for $20 a full set each, one set has light wear but the other set don't have any wear on the pads at all, can be lucky sometimes.
I love to build a hot motor using Jim's bits but way out of my price range unless I win lotto, I can only dream lol.
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Check those ebay lifters very carefully for pad detachment. You are looking for any sign of oil weeping from under the stelite.

In the 80s or 90s there were a bunch of followers sold that had a habit of loosing the pads. A lot ended up in the ebay after market. This information is from a friend working in retail at the time and subsequently as a Norton engineer. He has repaired several motors which have lost the stelite pads.
 
I believe Jim Comstock had a hand in developing the AN units. Should be good'uns, Eh!
 
johnm said:
Check those ebay lifters very carefully for pad detachment. You are looking for any sign of oil weeping from under the stelite.

In the 80s or 90s there were a bunch of followers sold that had a habit of loosing the pads. A lot ended up in the ebay after market. This information is from a friend working in retail at the time and subsequently as a Norton engineer. He has repaired several motors which have lost the stelite pads.
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All good Johnm I prob won't ever use them but the pads are all good for at the time $20 was good one set looks like it came out of a new motor as they have no wear on them at all even where they slide up the tunnels no sign of wear and as for the other set only 2 need a light grind, the pads on both sets are very solid., no longer working I no longer have access to the machinery to do the grinding, that was the best part of working in the maintenance workshop at a tec college (TAFE) for 31 years, but still kept the jig to grind 2 at a time.

Ashley
 
I an not sure if the heavyweight twins ever used stellite on the cam followers. In 1982 (after one broke in my 1957 Domi 88 Hybridracer) I had several, ranging from a radiused '57 through '60's flat to a new Commando one, tested in a mass spectrometer that the company I worked at had recently acquired. To my surprise they all turned out to be 20% chrome steel with not a trace of cobalt! A few years later when I was lucky enough to be employed at Norton I checked the drawing which did indeed specify stellite but, I guess no-one could ever check what was actually used.
 
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