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Brown & Sharpe model 1020 or 1021 gauge amplifier.
For what it's worth, I have a 1025 amplifier. The problem it has is the OEM charger is capable of supplying too much current. The consequence of this is, if the batteries are low, the current draw from the charger will blow components on the circuit board. Although the OEM charger is fine to... -
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Where micrometer standards ever made in .500" increments?
Indicating micrometers are very useful but, although they have "micrometer" as part of their name, they are a different device than the micrometers the OP asked about. An indicating micrometer is zeroed on a standard and then deviations from that zero depend on the accuracy and linearity of the... -
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Where micrometer standards ever made in .500" increments?
The "zero" on an old, non-digital micrometer can be set anywhere using a gauge block, but how else are you going to set the zero on a digital micrometer without closing the micrometer? Also, unless someone's blood is at 68 oF (or whatever the shop temperature is at), thermal expansion of the... -
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Where micrometer standards ever made in .500" increments?
If it only is used at 4.500", a 4.500" standard would tell you if there was wear at that point. However, more generally, wear could occur elsewhere so your micrometer could be perfect at 4.000", 4.500" and 5.000", all of which would be at full turns of the thimble, but have a periodic error... -
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Weight specification for 5C collets?
I suppose that is meant as an insult, although I'll take it as a compliment. However, I've gotten as much useful input from this thread as I'm likely to get so thanks to everyone who responded. -
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Weight specification for 5C collets?
I'll be happy to tell you the swing, but first I'd love to know why that's relevant to my question. -
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Weight specification for 5C collets?
The length of the taper on my 7/8" (0.875") 5C collet is only 0.62", and even though the 7/8" bore continues for a total of 1.1", once it's past the taper there's nothing but the 1.25" OD of the collet body to support the weight (i.e. a gap between the 7/8" shaft and the ID of the collet... -
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Weight specification for 5C collets?
I only mentioned slipping to say ignore it. I only am asking about a maximum weight. I, too, don't remember ever seeing a maximum weight for a 5C, and I couldn't find any relevant information using google, but that doesn't mean there isn't a maximum weight. I'm hoping someone here has the... -
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Weight specification for 5C collets?
Imagine a 1"-thick flywheel on a 7/8"-dia. shaft that is inserted the full length of a 5C collet, with face of the flywheel itself sitting almost against the nose of the collet (so the weight is at an effective length of 1/2" from the nose). Is anyone aware of a specification for the maximum... -
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Bearing diameter
That's not strictly true. After machining a damaged housing to accept the slightly larger OD of a metric bearing, I made a jig to clamp the inner and outer races together and used a Sunnen hone to "convert" the bearing's 25 mm ID to a slip fit for the 1.000" shaft. Given that XR750 parts are... -
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Math in Manufacturing
Since what you asked in your initial post should be perfectly clear to anyone who reads it, the subsequent lack of relevant responses perhaps indicates you should develop a study on the reading comprehension needed by manufacturing technicians before you attempt the subject of math. p.s. my... -
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Brown & Sharpe Indicator is it the real deal?
The first photograph is of my two BesTest indicators, bought at different times years ago from an authorized dealer. The next photograph is an overlay of mine with yours. The slight difference in registration of the tick marks on the faces can be due to the photographs not having been... -
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Kwik-Way boring bar specs
The estimate is from a straightforward formula from the back of the Sunnen catalog. I've used the formula to estimate a couple of honing jobs that I subsequently did and it did a reasonable job predicting how long they would take. Cylinders the OP intends to work on typically will require... -
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Kwik-Way boring bar specs
An advantage of honing is it is self-aligning so time doesn't have to be spent in setup. Sunnen gives a formula for estimating the time it would take to hone a given amount of material. Assuming a cylinder of diameter 1.25" and length 2.5" (i.e. the same bore and stroke, but to accommodate a... -
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Kwik-Way boring bar specs
Actually, Sunnen makes mandrels for their MBB-1660 down to 0.060", and their AN600 goes as large as 6.5" with the right set of stones. Unfortunately, it only goes as small as 2.5", which doesn't satisfy the OP's 1.5" requirement. Between 1.5" and the AN600's 2.5" the only choice would be... -
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Scientific paper on accurate (proper) measurement of tight tolerance bores?
A split ball (AKA split anvil) gauge of the type made by Diatest, but also sold by Mitutoyo, Mahr and perhaps others, certainly has the resolution you need. Diatest also makes an accessory that looks like a miniature arbor press that holds probe and that raises the part on a platform up to the... -
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Help with how to make a particular measurement
Thanks to everyone who responded. I now have a few ideas to try. Thanks again. -
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Help with how to make a particular measurement
It seems to me the issue the hemisphere creates is a ledge whose position is difficult to determine accurately, which in turn makes it difficult to determine the height h accurately. If it were flat at the top of 'h' the measuring problem would be simple. The drawing is to scale so it can be... -
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Help with how to make a particular measurement
Thanks for the responses so far. I'm sorry my drawing was ambiguous, but I hope the following one clears up possible confusion. It's an internal feature, the hemisphere is not a full half-sphere, the top surface is available to use as a reference, but the bottom one isn't. -
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Help with how to make a particular measurement
The customer is me, so however we figure out for me to measure it is exactly how the customer will check it.