Refined ratchet provides precise torque
A
Norbar Torque Tools product story
Edited by the Engineeringtalk editorial team
May 23, 2002
A novel design allows the latest torque tool to provide accurate torque settings over a range from 80 to 400Nm, even in applications with restricted access.
A novel design allows the latest torque tool to provide accurate torque settings over a range from 80 to 400Nm, even in applications with restricted access.
Weighing just 2kg, the Norbar Torque Tools Model 400 has a reinforced body for extra strength and uses an innovative ratchet mechanism, making it reliable and easy to use in areas where movement is restricted.
The challenge for the design of the new ratchet was to achieve both a strong ratchet capable of reliable service over a high number of cycles and to have the minimum angle of engagement - the angular distance through which the wrench handle has to rotate to engage the next tooth.
This narrow angle of engagement is critical when using the wrench in confined spaces.
The solution was to refine an idea that has been used on certain Norbar wrenches for many years.
A coarse tooth pattern, 30 teeth in this case, is used for great strength but the ratchet pawls are "offset" to give the ratchet the same engagement angle as a 60 tooth ratchet.
There are actually four pawls in the Model 400, arranged in offset pairs for even greater strength.
During its development, the wrench was extensively tested and benchmarked against competitive products.
The results indicated that ratchet life at full torque will be up to five times that of the nearest competitor and wrench was proven to withstand prolonged use at 400Nm.
Featuring a 0.75in square drive, the Model 400 is ideal for a wide range of applications and extends the torque capacity of the popular Norbar Professional range from 330 to 400Nm.
The Model 400 is available with an adjustable torque scale or as a "P" Type with a sealed adjustment and no scale for use in production applications where a single torque value is required.
With an accuracy of +/-3%, this rugged new wrench will provide many years of accurate, reliable service and, with Norbar's usual competitive pricing, represents outstanding value for money.
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Contact Norbar Torque Tools
Tel +44 1295 270333
Other Norbar Torque Tools stories
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Norbar presents torque measurement data
Norbar has launched a torque measurement, calibration and data-archiving system. -
Fixture tests pneumatic torque-wrenches in-house
Norbar Torque Tools has introduced a bench-top Power Tool Test Fixture for testing pneumatic torque-wrenches such as Norbar's Pneutorque range. -
Norbar expands range of Trutorque wrenches
Norbar has extended its range of Trutorque torque wrenches with two models suited to tough environments. -
Norbar Torque Tools offers Trucheck Plus
The Trucheck is a torque wrench tester with an accuracy of +/- 1 per cent and a range of up to 1000Nm. -
Easy ultrasonic measurement provides load details
The USM-3 can provide a 0-10V analogue output to precisely shut off torque tools when a predetermined bolt stretch or load has been attained.
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