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  #11  
Old 12-24-2011, 11:22 AM
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Charlie or Gerry, do y'all still have the instructions..I need to know the multiplier and how long to keep in contact with the shaft. I believe it is 100 and 1 minute but can't recall for certain.

Thanks
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  #12  
Old 12-24-2011, 11:53 AM
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Here's something for the Starrett 104,

The #104 can be used for up to 200ORPM. When the point is applied to a revolving shaft, the inner disc is held from turning by firmly pressing on the raised knob with the thumb or forefinger. Then by releasing, the pressure at the time the knob on the outer dial coincides with the knob being held, the disc will revolve. Every 100 revolutions of the spindle is counted by feeling the inner knob pass under the thumb or forefinger. Timing the number of revolutions for a minute will give the RPM.
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  #13  
Old 12-24-2011, 12:25 PM
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Moe, no I don't have the instructions. This one was in my dad's tools when he passed away. No telling where he got it.

If this will help, I scanned a couple items from my Starrett Catalog from 1988. The picture did not come out too great but maybe you can figure out how it works from the description.
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  #14  
Old 12-24-2011, 01:07 PM
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Quote:
Originally Posted by Charlie C View Post
Moe, no I don't have the instructions. This one was in my dad's tools when he passed away. No telling where he got it.

If this will help, I scanned a couple items from my Starrett Catalog from 1988. The picture did not come out too great but maybe you can figure out how it works from the description.


Thanks Charlie. Minhe is quite a bit different so those instructions won't work. I'm told the crapsman that I have is a clone of the Starrett no. 104.
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

"If we ever forget that we're one nation under God, then we will
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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #15  
Old 12-24-2011, 01:10 PM
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Quote:
Originally Posted by USMCPOP View Post
Here's something for the Starrett 104,

The #104 can be used for up to 200ORPM. When the point is applied to a revolving shaft, the inner disc is held from turning by firmly pressing on the raised knob with the thumb or forefinger. Then by releasing, the pressure at the time the knob on the outer dial coincides with the knob being held, the disc will revolve. Every 100 revolutions of the spindle is counted by feeling the inner knob pass under the thumb or forefinger. Timing the number of revolutions for a minute will give the RPM.


The center wheel on my crapsman is direct drive, no clutch.. I guess I could use it on a shaft with known RPM and figure it out. Thanks for the info..
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

"If we ever forget that we're one nation under God, then we will
be a nation gone under". ~Ronald Reagan

We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #16  
Old 12-24-2011, 03:01 PM
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Moe, this catalog shows the Starrett 104 and has a bit of write up on how the thing works.
This evening I will get a photo of the write up and post it.
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  #17  
Old 12-24-2011, 03:11 PM
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Quote:
Originally Posted by Charlie C View Post
Moe, this catalog shows the Starrett 104 and has a bit of write up on how the thing works.
This evening I will get a photo of the write up and post it.

I knew I could count on a SFT member...I hope you live long and prosper Charlie..
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

"If we ever forget that we're one nation under God, then we will
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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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  #18  
Old 12-24-2011, 03:28 PM
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As I recall there was more then one type out there.

A revolution counter may be one to one, one revolution = one division.
Turn the spindle once and see if it is 1 to 1 div.
If that is the case.
15 seconds is 1/4 of a minute.

Multiply the division count times 4 in 15 seconds, that will give you rpm.

I think the Speed counters were for faster rpm ranges. may have been 100 to 1 div.
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  #19  
Old 12-24-2011, 07:16 PM
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Here is the write up on the Starrett 104. Not a lot of information but maybe it will be enough for you to figure out the rest. Good Luck.
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  #20  
Old 12-25-2011, 02:44 PM
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Thanks Charlie. I think I have enough info now to break the code..
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck

"If we ever forget that we're one nation under God, then we will
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We should have picked our own cotton...

I love my women hot and my beer ice cold..
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