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Quantifying misalignment on tubing & casing couplings can be cumbersome. A CA-9001 coupling alignment gage makes it easier. The gage utilizes a three point system, so there is no unnecessary sweeping to find maximum & minimum indications. Instead, lay the coupling on its side, seating the gage into the threads, and then zero the dial. […]
For inspecting larger diameters and excessively long depths, the IT-6000 and the PD-6000 are limited. Use an IT-6001 for inspecting taper on tapered threads with greater than 9″ diameters. For diameters greater than 6″, a PD-6001 will inspect pitch diameter on straight threads and seal grooves. By stacking extension rods, these gages will inspect diameters […]
For Tubing and Casing, properly setting a TH-3002R thread height gage is easy, yet often done incorrectly. The setting standard (1014) has a square-shaped notch and a v-shaped notch. First, use the square-shaped notch, zero the gage. Then, use the v-shaped notch to verify the gage is zeroed. If the gage does not read zero […]
If an MRP gage wobbles or if the wear pads do not sit flush on the surface of a part, it could be an indication that the gage rails are slightly bent. To level the MRP, set the gage on the part and loosen the knobs. Then, turn the rails until both MRP blocks and […]
You can check both pitch diameter and taper on a rotary shouldered connection with the same gage. After using a PD-8000-RSC gage to inspect PD, zero the gage on the part. Then, just like using a taper gage, move one inch down the thread and inspect taper. Before moving to the next inspection, be sure […]
When comparing a Functional Diameter measurement to a Pitch Diameter measurement, the difference between the two readings should not exceed 40% of the allowable ANSI Pitch Diameter tolerance. If greater than 40%, inspect further by measuring lead and/or viewing a cast of the thread form on an optical comparator.
When inspecting 2⅜” and 2⅞” tubing with an MRP-1000 or MRP-2000, save time by quickly checking the PD at only one location. Because ovality isn’t a concern for small diameter tubing, an average of high and low readings is not necessary
When using an MRP to inspect a coupling’s Pitch Diameter, mark the location of the MRP on the face of the 1st machined part, and record the gage reading. Leave this 1st machined part nearby to verify between each additional machined coupling that the gage is still set properly.
Thread Profiles not only help check for the correct thread form, proper flank engagement and possible lead error, but you can inspect for burrs by sweeping the profile around the thread cone.
Before setting your lead gage to check a tapered thread, verify both the pitch and taper of your lead standard match the thread form to be measured. The notches on lead standards are precisely machined to compensate for the error of measuring on a tapered cone, as opposed to measuring on the axis of the […]