MITUTOYO Japan
Press Release
 May 17, 2010

New Release of "Bore Gage" - Fully-remodeled Inside Diameter Measurement Tools

Mitutoyo Corporation (Headquarters: Takatsu-ku, Kawasaki-shi, President: Toru Nakagawa) has developed and commercialized "Bore gage" in which the flagship models of inside diameter measurement tools/bore gages are fully remodeled. Mitutoyo intends to introduce this new series to the domestic market on and after May 21, 2010, gradually expanding sales into overseas markets.
Bore gages are widely used as a best-seller among inside diameter measurement tools on the machining shop floor and other sites. A bore gage , used as one of dial gage applied products, is an inside diameter measurement tool that converts an axial movement of the contact point into a movement vertical to the axis to read its displacement visually. To measure an inside diameter, check a datum point using a ring gage of which the nominal size is defined, and then perform comparative measurement of the diameter to the ring gage size. This series of bore gage is extremely easy-to-operate and convenient for massive measurement of workpieces with the same shape.
Since the first production of Mitutoyo bore gages in 1956, they have gotten a favorable reception on the market as a measuring tool capable of performing precision measurement of various inside diameters with ease and at a low cost, while continuously releasing new models to meet diversified needs such as a small-diameter type, standard type, short-leg type, shallow-hole type, micrometer head-equipped type, indicator-integrated type and rugged type depending on the measuring range, structure, and the shapes of measuring head and guide plate.
The just-released Bore Gage has achieved smooth operation and long operating life by reviewing the materials and shapes of various components to meet the need for still higher-accuracy inside measurement and more improvement in operability and durability.
The Bore Gage inherits the conventional simple structure as is, therewith improving the measuring accuracy of all models by 50% or more than that of predecessors, expanding the contact point stroke of flagship models as much as 33%, and improving abrasion resistance and surface roughness by using carbide balls for the contact point in touch with a workpiece and the tips of each anvil. Additionally, this series reduces the influence of temperature from the operatorŐs hand as much as 50% by increasing the size of the grip to be held by hand during measurement by 20% and also making the grip hollow-structured (design registered in Japan). Major accessories such as anvils, replacement washers, and extension rods are compatible with those of existing models.
Total 16 models in hot-selling sizes are introduced this time on the market including the flagship models with a measuring range of 50 to 150mm (standard type: Code No. 511-703, short-leg type: Code No. 511-763).
[Major Specifications]
●
 Successfully improving the measuring accuracy of all models
The measurement accuracy of new models has improved by 50% or more than that of predecessors (in JIS standard values).
●
 Expanding the contact point stroke of flagship models by 33%
The contact point stroke of flagship models is expanded from 1.2mm to 1.6mm, still assuring high accuracy.
●
 Employing carbide balls onto the contact point and each anvil tip of all models
The new carbide-ball contact point and anvil tip increase abrasion resistance compared with a steel-ball type (quench-hardened) and widely improve surface roughness compared with a carbide-tip type (molded). Thus, they almost never scratch a workpiece.
●
 Employing a new grip that reduces the influence of body temperature irrespective of prolonged use of it
This series reduces the influence of temperature from the operatorŐs hand as much as 50% by increasing the size of the grip to be held by hand during measurement by 20% and also employing the hollow-structured grip (design registered in Japan), thus maintaining high-accuracy measurement.
●
 Achieving smooth operation and long life by reviewing the material and shape of contact point components
This series has achieved smooth operation with minimum difference between measuring forces in push-in and retracing directions and long operating life. It also suppresses the variation in measuring force to enable stabilized measurement.
●
 Adopting a new structure for the guide plate to improve operability
The new models have succeeded in suppressing the variation of guide holding force within the contact point stroke. In addition to the ease of insertion into a workpiece, suppressing the guide holding force during the maximum pushing-in prevents the workpiece from being easily scratched.
●
 Selecting one of indicators provided with abundant types
An appropriate indicator can be selected according to the purpose from among those abundant indicators (optional) such as a 0.01mm-graduation dial indicator, 0.001mm-graduation dial indicator, less-than-one revolution dial indicator and dedicated bore gage digital indicator. Particularly, the digital indicator dedicated to bore gages is provided with an analog bar indication and minimum value auto-hold function necessary for inside diameter measurement tools, thereby allowing high-efficiency measurement.
[Major Specifications]
■ Standard type
Measuring range: 6 ranges of 18 to 35mm, 35 to 60mm, 50 to 150mm, 100 to 160mm, 160mm to 250mm, and 250 to 400mm
Contact point stroke: 1.2mm (in a measuring range of 18 to 60mm), 1.6mm (in a measuring range of 50 to 400mm)
■ Short-leg type
Measuring range: 4 ranges of 18 to 35mm, 35 to 60mm, 50 to 150mm, and 100 to 160mm
Contact point stroke: 1.2mm (in a measuring range of 18 to 60mm), 1.6mm (in a measuring range of 50 to 160mm)
■ Micrometer head-equipped type
Measuring range: 6 ranges of 60 to 100mm, 100 to 160mm, 150 to 250mm, 250 to 400mm, 400 to 600mm, and 600 to 800mm
Contact point stroke: 1.6mm
For detailed information about features, specifications, standard prices, etc., refer to "Catalog No.E3051 Bore Gage"Adobe Acrobat Readerenclosed.
close