Pitch Diameter Gage Operation Manual
Models MRP 1500/2500/3500
Copyright © 2018 Gagemaker. All rights reserved
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Congratulations! Your decision to purchase a Gagemaker product above all others on the market
demonstrates your confidence in our quality and workmanship.
To insure the high performance and operation of our product, we urge you to use the included reference
materials. They contain important information for proper setup and use of the equipment. Also, we
recommend that you follow the care and maintenance tips in this manual to keep the equipment working
in top condition.
If your questions have not been addressed in our reference materials, contact your local
representative or a customer service representative at 713-472-7360.
Introduction
The MRP Gages inspect the pitch diameter and ovality of internal and external tapered threads ranging
from 1 ½”-20”. The MRP includes three models, which gives the gage its versatility. The different frame
sizes allow each MRP model to measure a specific range of diameters. The MRP 1500 handles
diameters from 1 ½” to 4 ½”, the MRP 2500 fits diameters in the 5 ½” to 13 3/8” range and the MRP
3500 tackles the 8 5/8” to 20” diameter range.
The solid frame construction allows the MRP gage to set securely on the face of the connector without
any special adjustment. The gage uses two pivoting shoes that rest on the crests of the threads during
inspection. Any variations in pitch diameter detected during inspection are shown on the gage’s
indicator.
Before inspecting parts, the MRP gages must be preset to a nominal predetermined dimension. For
determining the gage’s setting dimensions and gauging tolerances, this manual includes tabled setting
values as well as formulas for calculating setting dimensions. The MRP gages can be preset using Rod
or Frame Style setting standards or Gagemaker’s MIC TRAC MIC TRAC measurement center.
To inspect parts, the pivot shoes are placed on the crest of the threads of the part and the gage is
properly positioned by sweeping to obtain the largest indicator reading. It is also recommended that the
gage be zeroed periodically during use to maintain accurate readings.
Technical Support
Phone: 713-472-7360
Hours: Monday – Friday 8AM – 5PM (CST)
Product Information and Updates
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