Sorry if this covers old ground, but I've been unable to nail down anything in the search function.
Pulled my (20 year old but brand new) UN1 apart to flip the crown wheel. I'm inverting the box to lower the input shaft. A fairly simple box, but the input shaft is a nonsense. I'm surprised it can handle more than 100HP. Dinky little splines that would be easily shredded by any real torque.
So I'm looking at a replacement one piece input shaft. Having contacted Albins (Australia), they have apparently only ever made one. An English firm has quoted something over 2400 quid, a bit more than I'm prepared to pay for a bit of machined shaft.
Strikes me that by sourcing a same OD, larger ID input bearing, a one piece input shaft could be machined up, with an increased overall diameter. OK, this may only be 1 or 2 mm, but every little bit helps. This larger OD could mean that the clutch plate spline OD could also be increased, giving a far larger range of potentially useable clutch plates.
This shaft would require a clutch plate spline, a straight cut gear (reverse?), 2 helically cut gears, and a threaded end. And, I assume, some ground finish surfaces.
Given the potential market from not just GT40 fans, but Lotus and the off road guys, I am puzzled that no-one is advertising that they sell this sort of shaft at an affordable price.
I am exploring the local manufacture, to at least get a sensible cost.
But if anyone has a supplier they can recommend, I would certainly be interested.
Clive
Pulled my (20 year old but brand new) UN1 apart to flip the crown wheel. I'm inverting the box to lower the input shaft. A fairly simple box, but the input shaft is a nonsense. I'm surprised it can handle more than 100HP. Dinky little splines that would be easily shredded by any real torque.
So I'm looking at a replacement one piece input shaft. Having contacted Albins (Australia), they have apparently only ever made one. An English firm has quoted something over 2400 quid, a bit more than I'm prepared to pay for a bit of machined shaft.
Strikes me that by sourcing a same OD, larger ID input bearing, a one piece input shaft could be machined up, with an increased overall diameter. OK, this may only be 1 or 2 mm, but every little bit helps. This larger OD could mean that the clutch plate spline OD could also be increased, giving a far larger range of potentially useable clutch plates.
This shaft would require a clutch plate spline, a straight cut gear (reverse?), 2 helically cut gears, and a threaded end. And, I assume, some ground finish surfaces.
Given the potential market from not just GT40 fans, but Lotus and the off road guys, I am puzzled that no-one is advertising that they sell this sort of shaft at an affordable price.
I am exploring the local manufacture, to at least get a sensible cost.
But if anyone has a supplier they can recommend, I would certainly be interested.
Clive