[geeks] A wizard's steam valve has a knob on the end

[Nick B]

Unless I'm reading these dimensions horribly wrong it looks like several
options from http://www.mcmaster.com/#machine-component-knobs/=nqx4h2 will
work, though they may have a slight amount of play.
Nick


On Tue, Jul 23, 2013 at 11:33 AM, Nick B <nick at pelagiris.org> wrote:

> McMaster Carr has tons of raw materials/parts, but I'm not sure they have
> knobs of arbitrary dimensions.
> Nick
>
>
> On Tue, Jul 23, 2013 at 11:30 AM, Phil Stracchino <alaric at metrocast.net>wrote:
>
>> Fellow geeks and wizards,
>> I need to find a replacement knob.  It's actually for a just-replaced
>> steam valve on an espresso machine.  I *could* order a replacement for
>> the cracked OEM knob, but I don't really want to because the OEM knob is
>> a poor design, molded plastic relying on a flat leaf spring.  I want a
>> knob that will outlast the valve.  I don't really care whether it
>> matches the original, I just want it to work, keep on working, and not
>> crack or slip.  I'm ideally looking for a molded hard-plastic (phenolic
>> reson, say) knob with a brass bushing and a set screw.
>>
>> The shaft it needs to fit onto is a D-section brass shaft, 0.230"
>> diameter (possibly nominally 6mm), with a .055" deep flat (so, .170"
>> diameter across the flat).  Knob OD must not exceed 1.5".
>>
>> Anyone have any suggestions where to start looking for such a knob?  I
>> figure there's enough frobbers of assorted mechanical and electronic
>> hardware here that it's likely someone will have a good starting place
>> or two to suggest.
>>
>>
>> --
>>   Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
>>   alaric at caerllewys.net   alaric at metrocast.net   phil at co.ordinate.org
>>   Renaissance Man, Unix ronin, Perl hacker, SQL wrangler, Free Stater
>>                  It's not the years, it's the mileage.
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