FREE copy of the Uptime Elements Implementation Guide once you subscribe to Reliability Weekly

General Rules which must be followed:

Image 11. Never over torque a Fastener. To over-torque a Fastener can cause it to stretch beyond normal limits causing Fastener breakage, or loosening of Fastener
2. Never under torque Fasteners because it can cause the Fastener to loosen to break
3. Ensure you know the torque specification
4. Ensure you know the torque specification if you are using a Fastener with lubricant on it or dry
5. As a general rule Fasteners should be lubricated unless manufacturer states otherwise
6. Know how to use a torque wrench. When all else fails read the instructions.
7. When unsure whether a Fastener should be torque to a specification, torque it
8. Do not re-use a Fastener if:
- If it was installed with an impact wrench
- If it could result in a safety risk

Fastener Failure Modes:

• Overloading - Force exceeds Fastener strength, Fastener loosens or shears
• Over-Torque - damaging the threads and deforming the hardware
• Under-Torque - allowing a joint to come loose. It may also allow the joint to flex and thus fail under fatigue.
• Brinelling - caused by poor quality washers, leading to a loss of clamp load and failure of the joint
• Corrosion - caused by the disintegration of an engineered material due to electrochemical oxidation of metals in reaction with an oxidant such as oxygen, this is why Fasteners must be lubricated unless stated by the equipment manufacturer.

Definitions:

Torque Wrench:

• A torque wrench is a tool used to precisely apply a specific torque to a fastener such as a nut or Fastener.
• A torque wrench is used where the tightness of screws and Fasteners is crucial.
• It allows the operator to measure the torque applied to the fastener so it can be matched to the specifications for a particular application. This permits proper tension and loading of all parts.

How to Torque a Fastener?

Using the most common torque wrench which is a "click type" follow these steps;

Step 1: Preset torque value on torque wrench as determined by the equipment manufacturer; or if not available a common torque specification chart. (see below)

Fastener Torque Charts

Note: When using anti-seize reduce lube torque value by 20%

Step 2: Torque the Fastener to the point where the desired torque is reached, signaling the desired torque by causing a click sound (some torque wrenches will not allow a Fastener to be torque above the setting however some will, be sure and purchase the best torque wrench possible)

If you have questions send an email to Ricky Smith at rsmith@gpallied.com

Tip submitted by Ricky Smith, GPAllied

Upcoming Events

August 8 - August 10, 2023

Maximo World 2023

View all Events
banner
80% of Reliabilityweb.com newsletter subscribers report finding something used to improve their jobs on a regular basis.
Subscribers get exclusive content. Just released...MRO Best Practices Special Report - a $399 value!
DOWNLOAD NOW
Defect Elimination in the context of Uptime Elements

Defect Elimination means a lot of things to a lot of people. Uptime Elements offers a specific context for defect elimination [DE] as a success factor on the reliability journey [RJ].

Internet of Things Vendors Disrupting the Asset Condition Management Domain at IMC-2022

Internet of Things Vendors Disrupting the Asset Condition Management Domain at IMC-2022 The 36th International Maintenance Conference collocated with the RELIABILITY 4.0 Digital Transformation Conference [East]

Asset Management Technology

The aim of the Asset Management technology domain is to assure that IT/OT systems are focused on creating the value from the assets and that the business can deliver to achieve organizational objectives as informed by risk.

TRIRIGAWORLD AWARDS at MaximoWorld 2022

TRIRIGAWORLD AWARDS honors excellence in space optimization and facility management, A Reliabilityweb.com event to further advance asset management

IMC-2022 Who's Who: The World's Best Run Companies

The International Maintenance Conference (IMC) provides a fresh, positive community-based curated experience to gain knowledge and a positive perspective for advancing reliability and asset management through people, their managers, the strategy, the processes, the data and the technology. The world’s best-run companies are connecting the workforce, management, assets and data to automate asset knowledge that can be leveraged for huge beneficial decisions.

Uptime Elements Root Cause Analysis

Root Cause Analysis is a problem solving method. Professionals who are competent in Root Cause Analysis for problem solving are in high demand.

Reliability Risk Meter

The asset is not concerned with the management decision. The asset responds to physics

Why Reliability Leadership?

If you do not manage reliability culture, it manages you, and you may not even be aware of the extent to which this is happening!

Asset Condition Management versus Asset Health Index

Confusion abounds in language. Have you thought through the constraints of using the language of Asset Health?

Seven Chakras of Asset Management by Terrence O'Hanlon

The seven major asset management chakras run cross-functionally from the specification and design of assets through the asset lifecycle to the decommissioning and disposal of the asset connected through technology