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Heavy Duty Bore Gages for Large Parts Measure up to 12" Diameter with Accuracy of 0.0001"

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Sunnen Products Co.

7910 Manchester Ave., St. Louis, MO, 63143, USA

Original Press Release

Heavy Duty Bore Gages for Large Parts Measure up to 12" Diameter with Accuracy of 0.0001"

Press release date: June 23, 2014

Sunnen GR-2245/2241 gages built roughneck tough for large-part machining. Patented, wear-proof ball cranks ensure long-term repeatability

Sunnen GR-2245/2241 bore gages combine rugged design with precise, reliable measurement to 0.0001" for heavy-duty large-part machining. Standard models are capable of checking bore diameters from 2" (50.8 mm) to 12" (300 mm) and bore lengths up to 24" (600 mm) with appropriate attachments, while special order models can measure bores up to 65" (1650 mm) long. GR-2245/2241 gages are ideal for energy industry components, such as flow meter tubes, liner hangers, drill pipe, mud pump liners and sucker rod pump barrels. Available with analog dial readout or electronic indicators, the gages feature long wearing, replaceable carbide gaging points to withstand extreme wear conditions with rough workpieces or abrasive materials. The gages feature patented wear-proof ball cranks for long-term repeatability and retractable or non-retractable gaging points. Models with retractable gaging points prevent scratching of the bore during removal. The gages are designed with a dust/water protection level of IP42 or IP53, and a specially designed Shock-Shield protects the dial from hand heat and jarring to ensure reliable readings.

The gages use adjustable centralizers to ensure proper positioning over the entire diameter range, resulting in accurate centering action, even if the gage is tilted off the bore axis. A simple twist adjusts gaging tension, allowing the head to go smoothly in and out of any size bore. A right angle attachment is available for conditions where the gage is difficult to read or total gage height is an issue. Blind-hole probes allow measurements to within 0.5" (13 mm) of the bottom the blind bore.

Standard dial-equipped gages read out in tenths (0.0001"/0.002 mm), and models with five-tenths read outs (0.0005"/0.010 mm) are also available.

Gages with electronic indicators are accurate to ±0.00012 in. (±0.003 mm) with 0.00005 in. (0.001 mm) resolution, and provide the ability to perform scaling calculations, judge tolerance, hold data and perform general comparison measurements. Operators can easily toggle between inches and metric measurement read outs. A data output cable enables direct transfer of bore measurements to a computer, making the gages ideal for fast SPC data collection at multiple points in a bore during long production runs. Gages can be preset with upper and lower tolerance limits for GO/±NG judgments, which are then displayed in full-size characters.

The electronic indicator displays the spindle's absolute position via an absolute linear encoder capable of relocating the origin, even after the power is turned off, for quick-start, multi-point measurement. The positive/negative count resulting from the spindle's up-and-down movement can be toggled, and the indicator face can be rotated 330 degrees, for easy reading at virtually any angle. Battery life, under normal use, is approximately 5000 hours. 

All gages come packed in sturdy, custom-fitted boxes with all tools and wrenches required for setup and adjustment.

For additional information on Sunnen dial bore gages visit www.sunnen.com/gages or email sales@sunnen.com.

Sunnen Contact
Mr. Bob Davis
Global Communications Mgr.
Sunnen Products Company
7910 Manchester Ave.
St. Louis, MO 63143
TEL: 314-781-2100 
bdavis@sunnen.com

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