SOHC.co.uk Forums > CB750
CB750F1 Valve guide reaming
martin_uk:
--- Quote from: Bryanj on December 02, 2018, 10:23:48 PM ---If there is no lead on the reamer sounds like a machine one instead on a hand one
--- End quote ---
Yes it was described as machine. Does that mean it has to be set up precisely rather than using a variable speed hand drill?
K2-K6:
Machine reamers have a "plug" form, in that they are parallel flutes all the way to the end and making them difficult to get them into the work material to start them cutting.
Usually they are for use on things like a milling machine or jig borer that presents the tool straight into the drilled hole with no misalignment.
Hand reamers have a taper on the lead end of the tool that allows the reamer to enter the valve guides (effectively being under sized) before the cutting flutes reach correct dimensions. Normally you can use them with a tap wrench to hand ream the hole as they only need to go slowly.
Bryanj:
You must not use a machine reamer in a hand drill as the chances of breaking both it and the valve guide are extremely high. Sorry but you have wasted the money on it.
martin_uk:
Life is a continual learning experience and I have wasted far more money :P
I spoke to engineering co suggested in Wallington and they can diamond hone for about £30, but it means getting it to and from them.
I have bought an adjustable reamer from UK so will see how that goes.
martin_uk:
--- Quote from: Laverda120 on December 02, 2018, 07:38:48 PM ---You could try J D Autoworx based in Wallington.
--- End quote ---
Thanks for suggestion
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