SOHC.co.uk Forums > CB350/400

Cross drilled discs

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K2-K6:
To OP, my understanding is that the diameter of hole equal to thickness (plus twice that in distance in between hole borders) relates to cast steel/iron disc materials such as this in photo

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Stainless being far more tolerant and ductile is generally acceptable at much more geometric compromise without risk.

Laverdaroo:
Blimey, that looks a little shagged out!

I simply and rather shamelessly copied another design and worked out the dims from what I had. I tried to get a course booked some years ago but pretty much faced the same issue as you, I'm searching for a tig welding course at the minuter but part from taking an NVQ but they're far and few between also. I reckon I'll just buy one and crack on practising, what could possibly;y go wrong ;D

I've always done that; have a problem, cant find a solution................teach yerself. When its you paying for it you soon learn quickly and you can always ask. I've mostly found people really helpful if I've needed to  and there is the never ending resource that is the internet.

I made one cock up hole on the disk shopwn but its staying on as a reminder, Im just on with setting up a jig for doing the 550 disce, (doing a twin front) so we'll see how that goes but I'm fairly confident abd rather looking forward to it if I'm honest. The chap I mentioned earlier, Dave at DY skims the discs for me and last time I think I was ripped off) knows what he's on with. It cost me a whole jar of coffee, some yorkshire tea bags AND some chocky hobnobs!

I made my displeasure felt ;D

Wouldnt have minded but didnt even get a brew, the swine! ;D

allankelly1:
Hi Roo

What do you think??

Don’t you love SolidWorks

Holes are patterned in sets of 3
with a second set of three that are pitched so the total pad area other than the outside and inside edges are covered and holes are only 6mm with plenty of space between holes to insure  disc integrity






Currently todays just been diagnosed with a slipped disc that I seem to have suffered about three weeks ago but up to now I managed work and home life  with loads of different coloured smarties ever two hours for the last three weeks but now got surgery booked for two weeks time. Then once  back to full strength after Xmas (as they said is about a six week recovery) I will modify my spare disc first shown below to see how it goes.

But in the mean time things ain’t too bad as Hopefully next week the other bits from my mate with the CNC will arrive and now I am a bit fooked up I most likely will farm our the disc locker unit too to him





Catch up soon and stay healthy

Best wishes Al


Sent from my iPhone using Tapatalk

McCabe-Thiele (Ted):
Not to knock what you want to do Allan but certainly on cars holes & fancy grooves are mainly cosmetic unless you are track racing - the big gain is from vented & ceramic discs on cars.

They look cool so I can buy into the cosmetic appeal.

taysidedragon:
Good luck with the slipped disc op. Make sure you drill the steel disc later, not the boney ones. 🤞

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