I make hard shafts and needle bearing roller rockers for Spitfire 1147,
1300/1500, TR6 and TR2-4.
I have 1147 shafts in stock.
Michael D. Porter wrote:
> Todd Montgomery wrote:
>> Does anyone know of a source for a hardened rocker shaft for a Spitfire
>> 1147? I have needle bearings but I can not run them on a stock shaft.
> Can't speak to a hardened shaft, but there is a guy in CA who does a
> pretty good job on the stock shaft. Company name is Rocker Arm
> Specialist. The contact information is in the monster list.
> What he does (for a damned good price, I might add) is take the stock
> shaft and rockers and rework them. The stock shaft is checked for
> trueness, oil reliefs ground in the rocker area, then hard-chromes the
> rocker shaft and installs bronze bushes in the stock rockers and reams
> them to fit and radiuses the rocker noses.
> Obviously, you need something a bit different than that if you're
> running non-stock rockers. But, you might call him and ask if he can
> grind and chrome your shaft to properly fit your needle-bearing
> rockers. That might be an alternative to finding (or having made) a
> high-hardness rocker shaft.
> The only concern I would have about chroming is the depth--too thin a
> layer of chrome might induce some spalling and flaking.
> If you can't find anyone supplying hard-surface shafts, you might call
> the guy and explain your needs.