- Precise dial graduations of 0.001", with one revolution equivalent to 0.100"
- Thumb-operated fine adjustment roll for one-handed use
- Lock screw holds the sliding jaw in position, to ensure a consistent measurement
- Rack teeth point down to keep foreign matter from clogging the gear
- Knife-edge contacts for inside and outside measurements
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Starrett 120 Series Dial Caliper, Stainless Steel, Inch, For Inside/Outside Measurements
|Price:||$181.75 - $822.56|
|Sale:||Lower price available on select options|
|System of Measurement||Inch|
|Material Type||Stainless Steel|
|Manufacturer Series Number||120 Series|
|Specific Uses For Product||Inside , Outside|
The Starrett dial caliper has sharp black graduations every 0.100" on the ... See more product details
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The Starrett dial caliper has sharp black graduations every 0.100" on the no-glare, satin-finished stainless steel bar, and graduations on the dial every 0.001". One full revolution of the dial is equivalent to 0.100". These calipers have knife-edge contacts for measuring both inside dimensions (ID) and outside dimensions (OD). The knife-edge contacts can be used to scribe parallel lines on the workpiece. This caliper can be used with one hand through operating the fine adjustment roll with the thumb. The lock screw locks the dial bezel and holds the sliding jaw in position. The depth rod is integrated into the rack of the caliper, unlike many calipers which offer a detachable depth rod, or none at all.
The hardened stainless steel components, including the bar, measuring surfaces, rack, gears, and depth rod, offer corrosion resistance, increased accuracy, and long life. Positive split gear anti-backlash control offers increased accuracy over standard gear configurations. Backlash is the amount of clearance between mated gear teeth in the caliper controls, which prevents the gear teeth from jamming. It is undesirable to have much backlash due to the lack of precision offered by the increased amount of play between gears. Certain gear designs can minimize or eliminate backlash; split gear systems actually split the gear into two gears, each half as thick as the original gear. One of these gears is then fixed to the shaft while the other gear is allowed to turn. The free-turning gear is connected to coil springs that rotate it until all of the backlash in the control system has been eliminated. The rack teeth point down to keep foreign matter from clogging the gear operations. This prevents measurement errors where metal chips could interfere with proper caliper operation.
Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, and machining. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The digital caliper takes a differential by zeroing the display at any point along the slide, with an LCD that displays a single value in English and/or metric units.The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company was founded in 1880 and is headquartered in Athol, MA.
Top Customer Reviews
Starrett has recently (within the past couple of years) made some changes to this caliper. I'll let you be the judge as to whether it was a good move. I should preface this by saying that I own several Starrett tools and have plans to add more to my chest (my wallet permitting).
The first change that I'll speak to is with the dial housing. It has gone from being made from metal to plastic. I spoke w/a tech rep at Starrett who told me that It was a cost cutting measure as well as an attempt to make all the dials in their product line universal. He also said that he has fielded several customer complaints regarding this change. I have both versions of this caliper and the one with the plastic dial does not meet my expectations of "heirloom quality". It is a fine caliper but the plastic on this instrument detracts from the reputation for quality that Starrett has developed. However, the metal dial version of this tool, IMHO, embodies the qualities that Starrett is known for. I should also say that there is no functional difference, that I can find, between the two calipers.
The other refinements (of the plastic dial version) are merely asthetic. The jaws have a slightly different profile and the depth rod is slightly thicker. Nothing that would provide anything better functionally.
I hope that Starrett will return to producing calipers with a metal dial housing. If you can get your hands on one of these, then you will really have something that is "heirloom quality"
I contacted Amazon regarding this and the service offered for replacement was fast and courteous. When my new replacement Starrett caliper arrived, I discovered it also had the dial set incorrectly at the 9 o'clock position. This led me to believe that both of the calipers had been assembled incorrectly at the factory.
My next step was to contact Starrett regarding this. They offered to adjust/repair my caliper, all the time still touting their quality and 100% inspection policy on everything leaving their factory, but as I packaged it up to ship to them, I reflected on not just the assembly of this product, but the fact that parts of it (the dial housing) were of inexpensive plastic, as noted by other reviewers. In my opinion, this is definitely not in keeping with a set of ... calipers.
I wound up shipping the Starrett back to Amazon for a refund. I wish Amazon would offer another brand of high end calipers for sale as I found the Starrett to be disappointing, especially so when considering Starrett is the only American made brand available.
Most Recent Customer Reviews
I like the Starrett 120 series Dial Calipers because of their simple, rugged stainless steel construction and ease of reading. Read morePublished 11 months ago by Michael P. Mcsheehy
I ordered the made in the USA version of this caliper and paid a premium price for it. I wanted my son to have this caliper to use for a lifetime. Read morePublished 14 months ago by Sam
It is sad to know that this is the only U.S made caliper. A little pricy however, when you under-cut a very expensive piece of steel due to an erroneous measurement from the China... Read morePublished 23 months ago by Mitchell Reed
The Starrett dial caliper is the last dial caliper still manufactured in the US. You can feel the precision as you use it. Read morePublished 23 months ago by Albert C. Price
Junk! It is at the manufacture. Broken!! Do not buy. A waste of money. Used one time. Not worth the price.
The manufacture now wants $87.50 to repair plus $7.00 shipping. Read more
First let me say that this pair of calipers was bought in the late 90s, so it has a metal dial. When I got them, I proceeded to use them daily in my job as a production machinist. Read morePublished on September 24, 2012 by VAgriller