1. How much "range" will I have using a Comtorgage?

The Amplifier/Coupler that is selected determines the "range" of the gage. A 1CM1/CM1 Series will have a range of +/- .003", a CM2 Series will have a range of +/- .006", a CM3 Series will have a range of +/- .009", etc.

2. Do I have to purchase an Amplifier for each Expansion Plug and Ring?

No. The expansion plugs are interchangeable in an amplifier, as long as the expansion plugs are all made to be used with the same magnification (CM1, CM2, CM3, etc.).

3. How can I use an SPC data collector with a Comtorgage?

You have a choice of using the Comtor Digital Indicator or the Comtor Coupler.
The Comtor Digital is equipped with an RS232 serial port that connects directly to most data collection systems. The Comtor Coupler can be used with your choice of digital indicator or LVDT probe, which can then be connected to your data collector.

4. How do I know what "Class" of Reference Ring to order for my gage?

The "Class" of the ring is based on accepted Gagemaker's Tolerances, and is normally selected by applying 10% of the total part tolerance. The tolerance of the reference ring should be at least 10% or better than the total part tolerance.

5. Will my Comtorgage come with Certification?

Certifications are optional at an additional cost. We offer Certification of Conformance on all Gage Heads and Amplifiers, which certifies the equipment conforms to Comtorgage engineering specifications. In addition we offer, Certification of Accuracy on all Amplifiers where actual measurements at major graduations are recorded. For Masters, we offer Certification of Class, which certifies the master conforms to size and class tolerances, and Certification of Size, where actual measurements at six positions are recorded.

6. What can I expect to achieve in a Gage R&R using a Comtorgage?

Comtor gages repeat and are accurate within one least increment as displayed on the dial of the mechanical amplifier. There are many factors involved in a Gage R&R, therefore, we will be happy to address this on an application basis after reviewing all pertinent information. In most cases, a Comtorgage can be expected to produce a 10% or better gage R&R.

7. What information do I need to provide in order to obtain a quote for a gage?

For a Through Hole Bore, we need the mean I.D. size and tolerance, and length of the bore. For a Blind Hole Bore, the mean I.D. size and tolerance, minimum length of the bore, plus maximum radius or undercut at the bottom of the bore and maximum lead chamfer of bore, if any. For all other applications, a part print is requested, so that we can quote the most appropriate gage for the application.

8. How do I order a gage? Does Comtorgage accept credit cards?

We will accept your company purchase order which can be mailed, faxed, or emailed to us in Rhode Island. Our terms are Net 30 Days, upon credit approval. We also accept Visa, MasterCard, and American Express, or can ship C.O.D.

9. I have a Comtorgage that has been in use for quite some time and I notice that when mastering, the "zero" is no longer at "12 o'clock" on the dial face. Is this due to wear? If so, can my gage be reconditioned?

Gradual wear at the gaging contact is reflected in a gradual progression of "0" to the plus (+) side, as the dial is kept adjusted to the master. In most instances, the Comtorgage can be recalibrated to it's original size, thereby greatly increasing it's useful life. As a general note, any more than .002" wear on a Comtorgage would render it as unsalvageable or beyond repair. The amount a Comtorgage is worn can be determined thru the use of a Comtorgage Plug Checker, SP-640-A.

10. I have a gage that is in need of repair. Where should I send it?

Send your gage to: ATTN: Repair Department
Comtorgage Corporation
58 N.S. Industrial Drive
Slatersville, RI 02876

Your gage will be evaluated by our inspection department, and you will be notified, via faxed quotation, whether repair and/or reconditioning is economically feasible and any alternatives available. A minimal fee is charged for the evaluation performed in the event no further service is desired.