torue wrench calibration procedure
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Cheng
From: Cheng [[email protected]]Sent: Saturday, July 09, 2011 10:59 PMTo: '[email protected]'Subject: FW: Sharing good ideas - Torque wrench Calibration on boardAttachments: Torque wrench calibration Gear.pdf
‐‐‐‐‐Original Message‐‐‐‐‐ From: MASTER [mailto:[email protected]] Sent: Thursday, June 09, 2011 6:48 PM To: [email protected]; [email protected] Subject: FW: Sharing good ideas ‐ Torque wrench Calibration on board ‐‐‐‐‐Original Message‐‐‐‐‐ From: [email protected] [mailto:[email protected]] Sent: Thursday, June 09, 2011 2:19 PM To: [email protected]; [email protected]; [email protected] Cc: [email protected] Subject: Sharing good ideas ‐ Torque wrench Calibration on board Good day, Attached pl find the attached pl find the arrangement fabricated on board Mill House for Calibration of Torque wrench. The Procedure and necessary reference information is provided for your guidance. Request to fabricate Calibration arrangement on board your vessel in the similar line and revert with details once done, any improvement is always welcome. All repair orders for Calibration of Torque wrenches to be Cancelled. Dynamometer to be Calibrated Annually by shore workshop. Kindly acknowledge receipt of the message and include this in your job plan. Regards Amit Tripathi <<Torque wrench calibration Gear.pdf>> Received: from INT at Globe Wireless; Thu, 09 Jun 2011 08:57 UTC Message‐id: 539927615
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LPG/C:
Procedure for calibration of Torque wrench
1)Set the torque wrench and dynamometer as shown in picture below.
2) Slowly pull the handle of torque wrench by chain block such that stable indicator on dynamometer panel glows green. Note the reading on Dynamometer panel when torque wrench snaps. Measure the distance from the center of socket and pull from wrench handle as shown in picture below.
3) Torque wrench setting(kgf m) =Load (kgf) X D (m)
4) Prepare Calibration Certificate for the range of the torque in few steps and include the Calculated Torque (T) for the corresponding Force (F) and moment arm (D) in tabular form.
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Torque is defined as: The measure of the force applied to produce rotational motion (usually measured in foot-pounds). Torque is determined by multiplying the applied force by the distance from the pivot point to the point where the force is applied.
Torque = Force x Moment Arm
In the English system, torque is measured in “foot-pounds” or “inch-pounds”. In the Metric system, torque is measured in “Newton-meters”. 8.851 inch-pounds = 1 Newton-meter 1 foot-pound = 12 inch-pounds 16 ounce-inches = 1 inch-pound 1 Newton = 1 kilogram-meter per second squared
Conversion Formulas:
Multiply By To obtain
foot-pounds 1.3558 Newton-meters
foot-pounds 0.1383 kilogram-meters
foot-pounds 12.0 inch-pounds
inch-pounds 0.0115 kilogram-meters
inch-pounds 0.1130 Newton-meters
inch-pounds 0.0833 foot-pounds
kilogram-meters 7.233 foot-pounds
kilogram-meters 86.7964 inch-pounds
kilogram-meters 9.8067 Newton-meters
Newton-meters 0.7376 foot-pounds
Newton-meters 8.8508 inch-pounds
Newton-meters 0.1020 kilogram-meters
Photographic reference.
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