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The Brown & Sharpe TESA Interapid 312 series dial test indicator has a white face, a 0.157" stem diameter, and inch measurements. The white dial and contrasting black hand help make measurements easy to read, and the dial face rotates to allow horizontal and vertical measurements. The carbide, ball-contact tip reaches into the workpiece for accurate measurements of turned, milled, and ground parts, and for tool setting gauges, fixtures, and inspections. The continuous clockwise pointer rotation and a revolution counter prevent plus or minus confusion. The ball-bearing lever system swivels through to 210 degrees. The dial face is mounted parallel to the insert's axis for mounting horizontally or vertically from the front, top, or back of the indicator. Dovetail mounts on the front and back provide a rigid setup, and a 4mm swiveling shank on the top of the indicator can be mounted at a range of angles. This indicator has a Monoblock body design with pinions mounted in jeweled bearings in an isolated assembly separate from the outer body, for high accuracy. It has full-metal construction for durability and corrosion resistance. This dial test indicator meets Deutsches Institut fur Normung (DIN) 2270, and Norme Francaise (French Institute for Standardization) NF E 11-053 standards, and includes a declaration of conformity. The set includes an Interapid 312 dial test indicator, a 0.080" (2mm) ball-end carbide contact point, a point key, a Certificate of Accuracy and Traceability, and a storage box.
Dial readings with three digits, such as 0-10-0, signify that the indicator has a balanced dial. Dial readings with two digits, such as 0-100, indicate that the dial has a continuous dial. Balanced dials are used to read the difference from a specific surface reference point. Continuous dials are used for direct readings and usually have a larger measurement range than balanced dials.
Dial indicators are also called dial gauges, dial calipers, and probe indicators. These precision measuring tools are used to accurately measure small linear distances and object sizes. The dial magnifies the measurement so that it can more easily be read by the human eye. Frequently used in manufacturing, laboratories, and other industrial or mechanical fields, dial indicators are used anywhere a small measurement must be found and recorded or transferred, such as checking the variation in tolerance of a workpiece. Standard dial indicators measure the displacement along the axis of the indicator. Dial test indicators are very similar to dial indicators, except that the axis of measurement is perpendicular to the axis of the indicator. Dial and dial test indicators can be analog, with a mechanical dial, or electronic, with a digital display. Some electronic models transfer the data electronically to a computer for recording and potential manipulation.
Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, played a key role in setting industrial standards in the United States. Brown & Sharpe was acquired by Hexagon Metrology in 2001 and is headquartered in North Kingstown, RI.
What's in the Box?
- Brown and Sharpe Interapid 312 dial test indicator
- 0.080" (2mm) ball-end carbide contact point
- Point key
- Certificate of accuracy and traceability
- Storage box
Harold S Bartman
Reviewed in the United States on April 3, 2023
I've been using these Interapid (Tesa) indicators for 40 years. I use this .0005" model as well as their .0001" model. As far as I'm concerned, they are the gold standard for use in precision machining.
Matt
Reviewed in the United States on April 16, 2023
these are the best indicator that you can buy.
Stanley Murkle
Reviewed in the United States on March 14, 2022
Works great! Interapid is pretty much the standard at the shop. Always dependable, accurate, and works very well. The only reason I gave 4 stars is because the lens on the dial had a small blemish on the side of it. Does not affect visibility or function, but for the brand and price of this indicator. It should have came flawless. Not sure if these are refurbished or what, but definitely cheaper than other places I've searched.
John Mitchell
Reviewed in the United States on November 10, 2022
A great indicator to have. Way to read and use. It's used almost daily. I glad I bought it.
Customer
Reviewed in the United States on November 8, 2020
Great product. Worth the price.
Luis Espinoza
Reviewed in the United States on May 15, 2018
This product is great. I'm a Quality Inspector and I've worked for a large machine tool manufacturer for over 12 years and this indicator is great. I've worked with many ranges of indicators in the past from: .001, .0005, .0001 & .00005 Mitotuyo and Brown and Sharpe that are provided by the company but never pulled the trigger on one for myself. I was able to get it for a very cheap price and it works great. If you work for a shop I highly recommend it.
steven m
Reviewed in the United States on June 16, 2017
Works well...Very sensitive.. Use it in my shop and to check vintage indicators too. Gave it 5 stars but it came with no accessories. For the money it commands it should have came with at least a swivel dovetail clamp that attaches to the rails, and then can me mounted to any 1/4" rod. I ended up buying a 4mm collet to hold the shaft on the top of the indicator in my mill spindle. I also use a vintage swivel like the one in the pic that mounts to the two dove tail rails, like I previously stated. Would I buy it again....Yes.)
Robert Madalinski
Reviewed in the United States on October 23, 2013
Just started machining on a Harbor Freight mini mill. Tried other digital depth gauges to set up the mill but this is the way to go. Very easy to use and is repeatable. Pricey but no regrets, makes mill setup quick, just be careful, it's small and delicate like a hummingbird.
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