JurekB

Most recent activity

• Knife porn thread

  in Miscellaneous and Meaningless • 9 hours, 10 minutes

  

  I've seen videos on Youtube, and most are good as a general guide, but none go into the level of detail afforded by a one-on-one (ok, 1-on-5) class.
  Little things like the direction in which you should pull your thumb across the edge of the blade to check for the burr. How to ameliorate if you've managed to form a burr on all but 15% of the blade edge. How the colour/reflection of your honed edge should be consistent along the entire length of the blade - stuff that is generally too fine for a camera to pick up on. The sound made by the blade against the stone when material is actually being removed from the blade, as opposed to the futile rubbing of metal against stone - too subtle, I suspect, for most microphones to pick up.
  To sum up, without stating the obvs. I think a video would be hard pushed to match that delivered by a well tutored class.

• Any question answered...

  in Miscellaneous and Meaningless • 10 hours, 56 minutes

  

  I had this in a carbon frame.
  Tried the Vacuum cleaner and the magnet.
  Ended up sorting it by pouring in some very thin superglue and letting it set with the rattly thing in it.
  Make a hole for the glue, if needs be.

• Bicycle Tag of bike

  in General • 1 day, 11 hours

  

  Ah! Krapy as in Krapy rub snif?

• This morning's commute and other commuting stories

  in General • 1 day, 15 hours

  

  Under the flap on the offside rear corner according to this:
  https://www.thesun.co.uk/news/3857720/cy­clist-london-bus-driver-emergency-switch­-video/
  I suspect it isn't the only one.

• This morning's commute and other commuting stories

  in General • 2 days, 12 hours

  

  13 in just under 15 miles, SE23 to E17.
  Not including ped crossings - 'cos you can go through those on red, can't you?

• Knife porn thread

  in Miscellaneous and Meaningless • 2 days, 16 hours

  

  I'm told that the technique I was using on the waterstone, is what you'd ordinarily use when stropping - ie; alternate sides of the blade on each stroke.
  This achieves an edge which isn't exactly blunt, but is not as keen as it could be.
  It also has the effect of wearing a concave 'dish' into the stone.
  A stone which isn't flat, is not desirable.
  What I wasn't doing was building up a burr on the edge of the blade, and then honing it back.
  Every day is a school day.

• Knife porn thread

  in Miscellaneous and Meaningless • 3 days, 2 hours

  

  I did a 2 hour sharpening class at Blenheim Forge this weekend.
  The 5 strong class was informative and guided me away from the erroneous way of sharpening, taught to me by my grandfather. Habits which are probably best dropped.
  There was no heat, fire, sparks or white hot bits of metal being forged with GBFO hydraulic hammers.
  As forges go, I disappoint deeply.

• Brompton owners (was: Brompton rider outed)

  in General • 5 days, 9 hours

  

  Deffo recommended.
  I bought one for the Brompton and found it so comfortable that it went straight onto the fixed commuter, while I ordered a replacement for the Brompton.
  FWIW the saddles on my three road bikes are Fizik Arione - just to give you an idea of the shape which seems to fit my aerosol -The JK is of a similar form.

• Craftsmen/women (craftspeople, I suppose)

  in Miscellaneous and Meaningless • 5 days, 17 hours

  

  It's probably worth reminding ourselves that although 3-D printing has been around for more than 20 years (having only recently become affordable), it has previously appeared centre stage as Stereo Lithography and Rapid Prototyping (amongst other monikers).
  I'm not convinced that the materials currently available for 3-D printing (especially when it comes to plastics) necessarily have the properties one would choose were one doing a production run using conventional injection moulding techniques.
  Where 3-D printing has the edge over conventional moulding techniques is
  A) The ability to quickly produce low quantity prototype forms without having to resort to expensive tooling, and
  B) The ability to produce forms which would otherwise be impossible using conventional tooling.
  I don't think 3-D printing (where we are with it today) was intended for producing stressed components, which rely on the properties of their material for their robustness and performance.
  That, I think, is yet to come.

• Any question answered...

  in Miscellaneous and Meaningless • 1 week, 2 days

  

  If you're struggling to get hold of a plate, give me a shout. I've got a couple of plates which I removed from some de-commissioned Sidis for exactly this sort of situation.