Interapid Indicator with 5.5" long Contact Points
5.5" extra long carbide point with M1.7 threads suitable for use with Interapid models 312B-15 and 312B-15V
Interapid 312B-15 and 312B-15V (vertical style) already come with 2.75" long contact points.
You have the option of installing a 5.5" long point (exactly twice the length).
- Even though the dial reads in .0005", once you install the 5.5" long contact point the graduations on the dial will be equal to .001" (There are no other options.)
Many customers use this long point for finding center and concentricity of barrels, such as rifle and gun barrels. In those cases, the value of the graduations are of little concern. Customers who have used this special point report that the indicator works fine and that the overall accuracy is not compromised.
The shaft of the point is steel and the ball is carbide with .080" diameter. The thread is M1.7 making it suitable for Interapid 312B-15 and 312B-15V indicators.
It should not be used with other Interapid models. The 312B-15 and 312B-15V have stronger hairsprings which helps overcome the extra weight of the longer points. We do not advise using this point with any other brand of test indicator.
Horizontal model shown above.
Specifications:
- Make = Interapid (Swiss)
- Style = horizontal or vertical
- Range = .06"
- Dial diameter = 1.5"
- Graduations = .0005" (see note below)
MTC39-55 … 5.5" extra long carbide point with M1.7 thread … $55.00 … order contact point only
Note: prices effective April 4, 2024
- Be sure to read the information on this page so that you understand the limitations of this indicator when it has the 5.5" long point installed. Be aware that we cannot accept returns on this item if you decide that it doesn't meet your needs.
Note: prices effective April 4, 2024
| Interapid | Point Length | Model No. | Order No. | ||
|---|---|---|---|---|---|
| .0005" | Horizontal | 2.750" | 312B-15 | 74.111965 | $478.00 |
| see note* | Horizontal | 5.5" | 312B-15X | 74.111965X | $533.00 |
| .0005" | Vertical | 2.750" | 312B-15V | 74.111958 | $478.00 |
| see note* | Vertical | 5.5" | 312B-15VX | 74.111958X | $535.00 |
*Note: Even though the dial reads in .0005", once you use the 5.5" long contact point the graduations on the dial will be equal to .001"
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Long Island Indicator Service
Long Island Indicator Service was founded in 1960. We provide professional repair service for precision measuring tools and gages with an emphasis on Swiss made test indicators, dial indicators, dial calipers and micrometers. We are pleased to be a recognized service partner for Brown & Sharpe.
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Privacy: We do not collect any information while you are visiting this website unless you proceed to place an order. If you place an order, your information will be kept confidential and will not be sold or made available to any other entity. If one of our links leads to Amazon, their privacy statement should be considered.