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Author Topic: What do I measure  (Read 2438 times)

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Offline stanley62

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What do I measure
« on: July 19, 2011, 10:31:56 AM »
I should know what this is, but I don't.  My guess is to measure RPM.  Anyone know for sure???
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Always looking for Stanley planes and parts, Mossberg and Plomb wrenches.

Offline jimwrench

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Re: What do I measure
« Reply #1 on: July 19, 2011, 10:34:11 AM »
 Rpm is the right answer.
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Jim
Mr. Dollarwrench

Offline rusty

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Re: What do I measure
« Reply #2 on: July 19, 2011, 04:31:32 PM »

Yup, rpm. It is really just a counter tho, it counts how many times a shaft goes around. To measure speed, you also need a watch to time how long it took to go around that many times...

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Just a weathered light rust/WD40 mix patina.

lzenglish

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Re: What do I measure
« Reply #3 on: July 19, 2011, 05:04:24 PM »
I have 3 of them, but none have the needed rubber ends to allow them touch the shaft with. What brand is yours?

Wayne
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Offline anglesmith

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Re: What do I measure
« Reply #4 on: July 19, 2011, 05:38:26 PM »
Most of them have a friction "cluch" , the early starrets didn't (pre 1905?) You line up the "dimples" and hold down on the top one. apply to speeding shaft, when ready release pressure and time for one minute. Whala! you should have your shaft speed?
Graeme
« Last Edit: July 19, 2011, 06:41:26 PM by anglesmith »
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Offline rusty

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Re: What do I measure
« Reply #5 on: July 19, 2011, 06:38:56 PM »
>the needed rubber ends

Pencil eraser : )
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Just a weathered light rust/WD40 mix patina.

Offline stanley62

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Re: What do I measure
« Reply #6 on: July 20, 2011, 10:43:52 AM »
This one is a Starrett.  It does look like it has a pencil eraser retrofit, at least the metal crimp that holds the eraser.  The end that touches the shaft is black rubber.
 Jim
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Always looking for Stanley planes and parts, Mossberg and Plomb wrenches.
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