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techtalk:ref:tools025 [2020/05/23 23:02] hippysmack [Using a Torque Wrench] |
techtalk:ref:tools025 [2020/05/23 23:57] hippysmack [Torque Wrench Maintenance] |
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| {{:techtalk:ref:tools:torque_wrench_maintenance_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) {{:techtalk:ref:tools:torque_wrench_maintenance_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) \\ | {{:techtalk:ref:tools:torque_wrench_maintenance_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) {{:techtalk:ref:tools:torque_wrench_maintenance_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) \\ | ||
| + | Related videos: | ||
| + | * [[https://www.youtube.com/watch?v=DQdOgW0Vl5Y|Clicker type torque wrench repair]] (includes disassembly) | ||
| ====== Torque Wrench and Accuracy ====== | ====== Torque Wrench and Accuracy ====== | ||
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| * The drive end doesn't know when to click. It is pre-calculated force from the handle working to build force at the drive end. \\ Pulling from the nut on the end adds more length but creates the same force on the drive end (fooling the wrench to click prematurely). | * The drive end doesn't know when to click. It is pre-calculated force from the handle working to build force at the drive end. \\ Pulling from the nut on the end adds more length but creates the same force on the drive end (fooling the wrench to click prematurely). | ||
| * You can also turn the nut by accident which will change the wrench calibration throughout it's torque scale. | * You can also turn the nut by accident which will change the wrench calibration throughout it's torque scale. | ||
| + | * **Always slowly pull (never push on the handle) the tool toward you in a clockwise manner.**. | ||
| + | * You lose control of the torque applied when you push on the handle. | ||
| + | * If the wrench slips off the bolt/nut, busted knuckles or worse injury to follow. | ||
| * **Hand placement and the angle of the wrench is important**. | * **Hand placement and the angle of the wrench is important**. | ||
| * It's common practice to cup the end of the tool with one hand and use a slight pressure against and centered to the bolt/nut. \\ Then move the wrench handle with the other hand at 90° from the fastener. | * It's common practice to cup the end of the tool with one hand and use a slight pressure against and centered to the bolt/nut. \\ Then move the wrench handle with the other hand at 90° from the fastener. | ||
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| * There is no reason to re-torque heads. If you made it to final torque and everything went Ok, you can do more harm than good on re-torque. | * There is no reason to re-torque heads. If you made it to final torque and everything went Ok, you can do more harm than good on re-torque. | ||
| * At this point, your mainly insuring that you didn't miss a bolt when making the rounds. It's better to know now rather when your on the road. | * At this point, your mainly insuring that you didn't miss a bolt when making the rounds. It's better to know now rather when your on the road. | ||
| + | |||
| + | **Wrench type specifics**: | ||
| + | * Beam wrench: | ||
| + | * As you pull tighter, you will notice the handle bend slightly. \\ This calibrated bending is the result of applied torque. Watch the end of the needle located just above the handle. \\ As the beam bends, the needle points to the amount of torque being applied. | ||
| + | * Continue to turn the fastener, and allow the handle to rotate so that the pivot is the only thing contacting the beam. \\ Some handles have a pivot piece that you actually are holding. \\ Arrange it so the handle 'floats' with you instead of cocking sideways against the bending beam. | ||
| + | * Keep your eyes looking straight at the center bar end and the torque scale. \\ It's hard to impossible to judge when the pointer is on the right value looking from the side. | ||
| + | |||
| {{:techtalk:ref:tools:general_torque_sequence_drawing_by_hippysmack.png?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:ref:tools:torque_wrench_-_proper_hand_placement_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) \\ | {{:techtalk:ref:tools:general_torque_sequence_drawing_by_hippysmack.png?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:ref:tools:torque_wrench_-_proper_hand_placement_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) \\ | ||
