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Re: metric

 

Interesting that we are all headed to metrics later this year.? When I started teaching Industrial Technology back in 1971,? we were all concerned that our world (U.S.) was moving to metrics soon.? We lost so much sleep worrying when it was going to happen and we would have to buy NEW measuring devices, change all the dials on equipment, and so on.? Now that I am OLD, I am still sleep deprived but NOT because of metrics.? I am not sure where you live or are moving to but metrics NEVER came to the U.S. as the only way of measuring in this country.? It just did NOT happen!? As others have stated 10-14 tpi is usual and common.? HF has a bi-metal hardened toothed that lasts a long time.? Use your 20% coupon for a savings.? DBQ49er


On Tue, Feb 25, 2020 at 11:04 PM Giordano <john.nurick@...> wrote:
I just checked a couple of Australian and French vendor websites. The Australian ones still use tpi, the French use mm pitch for ordinary blades but seem to use 10/14 for variable pitch.

Where are you heading?

On Wed, 26 Feb. 2020, 12:33 Jerry Durand, <jdurand@...> wrote:
So, are they sold as "1.8-2.5mm pitch blade" or will they look at me like I'm a crazy expat?

I guess maybe it's best to just take a blade to a local shop and point.

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Jerry Durand, Durand Interstellar, Inc. +1 408 356-3886
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On Feb 25, 2020, at 20:29, Giordano <john.nurick@...> wrote:
Anywhere there's a pitch in tpi, you convert it into millimetres by dividing into 25.4. So a 10 tpi blade corresponds to approximately 2.5mm pitch, 14 tpi to 1.8.?

Length is usually specified in millimetres?

On Wed, 26 Feb. 2020, 12:01 Jerry Durand, < jdurand@...> wrote:
I was just thinking, as we'll be moving to metric-land later this year, what do I ask for when I shop for blades?? As in, what's the metric size?? Also, I use 10-14 tpi, is there a metric equivalent (not conversion, but actual number they use)?

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Jerry Durand, Durand Interstellar, Inc. +1 408 356-3886
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