fork crown seat cutting

[NBC]

thanks guys, it sounds like the hand tool is going to be good for this,

the park tool i understand has a double faced cutter, that is held in with a screw onto a flat portion of the cutter and is easy to change over ?

if i was to go with something like the cobra or the silva cutter, that i understand uses a threaded cutter like campagnolo, do you have 2 handles, or just swap the cutter over ? not sure how hard this is as i've never used anything but an icetoolz one, which i thought was rather useless tbh

thanks again

nathan

[afwalker]

To be fair to the Cyclus, it does have an allen adjustment screw which tightens up around the steerer. I just finished another fork, and with the pre-cut on the lathe, and the tightened up nut, got a good crown race seat cut. 9225658094_4681c75900_m.jpg
The nut just pushed on one spot, but it does seem to come out fine.
cheers
andy walker

[EricKeller]

as the world's worst machinist^(TM) I mark the steerer with my cutter, take it down really close on the lathe, and then finish with the cutter. Although since I just fixed my lathe I might just take it down to dimension with the lathe the next time. People have been scaring me with stories about how thier cutter cuts small, and I don't really want to spend the money on more cutters when I have a lathe. About the only good thing I can say about my lathe is that for a 13" it has a big clearance hole in the spindle. I would also like to install my DRO on there, it makes it a lot easier to hit a dimension.

[NBC]

sorry to bring it up again, but i was thinking (dangerous i know !)

for those of you that use the campagnolo tool, what replacement cutter do you use ? as i presume the genuine campagnolo one may no longer be available ?

the handle from cobra appears to be a copy of the campagnolo one, would this therefore be a tool worth purchasing over other brands ?

thanks

nathan

[steve garro]

sorry to bring it up again, but i was thinking (dangerous i know !)

for those of you that use the campagnolo tool, what replacement cutter do you use ? as i presume the genuine campagnolo one may no longer be available ?

the handle from cobra appears to be a copy of the campagnolo one, would this therefore be a tool worth purchasing over other brands ?

thanks

nathan

If you are getting a new unit, think about the Bringheli - no slop, no chatter, fits great, nice & sharp, and made by Joe.
I love mine.
Bringheli Parts
- Garro.

[EricKeller]

my understanding is that Cobra made Campagnolo's tools, but I could be wrong

[NBC]

steve,

might i have a picture of the bringheli cutter you have ?

would the fact i live in england be much of a problem with replacement cutters ? or do they have enough meat for a regrind every so often ?

thanks

nathan

[Ped]

I cut my seats down to the correct size on the lathe before I fit the blades. But now I'm wondering why people have said they rough cut on the lathe and then cut to final size with a cutter? Am I missing something?

If you're in the uk and after a lathe I recommend the Harrison m250/300 series. Bigger and more useful than a myford and has a 1" 3/8 spindle bore. You can pick a good one up for less than £1000.

[EricKeller]

I cut my seats down to the correct size on the lathe before I fit the blades. But now I'm wondering why people have said they rough cut on the lathe and then cut to final size with a cutter? Am I missing something?

I do it because I find it easier than hitting an exact dimension on the lathe. I have the cutter, it cuts nicely when the seat is almost to dimension. Did I mention that I'm the worlds worst machinist? Or translated into the English, "engineer."

[Ped]

Thanks Eric, I understand.

I don't actually have a cutter myself so just sneak up on it very carefully, and I'd struggle without a DRO!

[Curt Goodrich]

I do it because I find it easier than hitting an exact dimension on the lathe. I have the cutter, it cuts nicely when the seat is almost to dimension. Did I mention that I'm the worlds worst machinist? Or translated into the English, "engineer."

I do the same thing. Even though it's a two step process, I suspect it's faster too. I quickly rough cut on the lathe to around 27.0. Finish up with the cutter and never worry about cutting undersized.

[Eric Estlund]

Works great:


Works great, easier on my shoulders:

[Ped]

Wow, that's a BIG chuck Eric! What machine is that fixed to?

[Eric Estlund]

My Lion-2 tons of fork crown turning badness.

[Ped]

Wow.

As the kids in England say 'I'm well Jel'

[Ped]

Translation: I'm very jealous.

[bencooper]

Totes! ;-)

I can just about get a steerer and crown onto my lathe:


Making forks by Ben Cooper, on Flickr

[shand]

The guys in the unit next door just had this delivered. I suspect it might be a bit overkill for crown race seats!


Delivery next door by shandcycles, on Flickr


Delivery next door by shandcycles, on Flickr

[progetto]

There just getting prepared when the next over over sized steerer standard comes out.

[EricKeller]

The guys in the unit next door just had this delivered. I suspect it might be a bit overkill for crown race seats!

not quite big enough to swing the entire frame, but getting there