What is the size of the woodruff key that holds the ignition spinner on a series 2 Jota?
- Thread starter Nick
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piranha-bro2
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Not hard to fashion a key out of keyway steel, readily available from bearing shops.
Ernesto
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Far easier for me to buy from one of the usual suspects. Won't cost a leg and
I'll get the right one.
I'll get the right one.
piranha-bro2
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Agree. Was thinking if you get stuck for one.Hmmm for you maybeFar easier for me to just buy one off ebay or somesuch! There must be a formula to calculate what the woodruff key would be?
Nick
Dellortoman
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Formula? It's not that complicated.
As far as I recall it's just a piece of square section key steel (as opposed to a Woodruff key that's half-moon shaped). I don't remember the size, but you can measure the width of the slot and buy suitable sized key steel on ebay. It'll probably come in a 150mm or 300mm length, so you'll need a vice, hacksaw and file.
Alternatively, contact Wolfgang (or Andy Wagner, Red, Keith ...) and buy the key.
breganzane
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- NSW Australia
Just pulled the one out of the Corsa to put you all out of your misery... 
Width - 2.97 (ie 3mm key, not 1/8")
Chord length - ~9.5
Chord Height - ~3.67
According to me that comes out at a diameter of 9.8, so could assume it is a nominal 3mm wide x 10mm dia woodruff slot, with a ~3.7 height key. Take all that to a decent bearing shop and they should be able to sort you, alternatively ebay:
New Metric Woodruff Key. 3mm x 3.7mm. Carbon Steel. M3x3.7mm
Width - 2.97 (ie 3mm key, not 1/8")
Chord length - ~9.5
Chord Height - ~3.67
According to me that comes out at a diameter of 9.8, so could assume it is a nominal 3mm wide x 10mm dia woodruff slot, with a ~3.7 height key. Take all that to a decent bearing shop and they should be able to sort you, alternatively ebay:
New Metric Woodruff Key. 3mm x 3.7mm. Carbon Steel. M3x3.7mm
New Metric Woodruff Key. 3mm x 3.7mm. Carbon Steel. M3x3.7mm. | eBay Australia
Woodruff Keys. 3mm x 3.7mm. Carbon Steel. Made of carbon steel. 3mm x 5mm. 2.5mm x 3.7mm. New Imperial Woodruff Key 1/4" x 1.1/8". New Imperial Woodruff Key 1/8" x 5/8".
www.ebay.com.au
Dellortoman
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- Tasmania, Australia
OK. I was wrong. My apologies. I thought it was a square section key. Musta been thinking of some other key 
breganzane
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- NSW Australia
I'll give you the ChrisK treatment...
Post1....OK. I was wrong. My apologies. I thought it was a square section key. Musta been thinking of some other key
Don't seem to have the woodruff key but guess it's a standard engineering 'thing' rather than being a Laverda part. If someone could tell me what to fetch from ebay I'd be most grateful.
Nick
Dellortoman
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Thanks Steve. I did actually read that, but many people use Woodruff as a generic term for any type of shaft key, not just the half moon shape.
I wrongly assumed Nick was one of those uneducated knuckle-dragging inbred mouth breathers who didn't know any better. Sorry Nick.
I wrongly assumed Nick was one of those uneducated knuckle-dragging inbred mouth breathers who didn't know any better. Sorry Nick.
chrisk
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- Brisbane, Australia
Hey, I read that bit!