Is there a way to check the torque of a bolt?
Bolt torque can be checked with a tool such as a torque wrench, but without a value as a guideline, a torque wrench offers no advantage. To arrive at the correct torque value, several other values must be found first. Two principles influence the correct clamping pressure for each bolt, known as clamp load.
What’s the torque tension for a Grade 9 nut?
Use Prevailing Torque All-Metal Nut chart if using this style of nut. D = Nominal Diameter F = Clamp Load For J429 Grade 5 and 8, FNL Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. For A307 Grade A, 75% of 36,000 PSI is utilized. A193 B7 uses 75% of the yield strength.
What is the correct torque for a SAE J429 bolt?
SAE J429 governs imperial sizes, while ISO 898 governs metric-size bolts. 1/4 to 3/4in. >3/4 to 1 1/2in. For imperial bolts, grades 5 and 8 are most common. SAE J429 conforming bolts will have radial markings machined on the head of the bolt that indicate bolt grade.
What is the torque of a M8 bolt?
1) M8 are in inch-pounds; diameters M10 and larger are in foot-lbs. The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt’s minimum tensile strength.
Use Prevailing Torque All-Metal Nut chart if using this style of nut. D = Nominal Diameter F = Clamp Load For J429 Grade 5 and 8, FNL Grade 9, A574, Class 4.6, 8.8, 10.9 and 12.9, the clamp loads are listed at 75% of the proof loads specified by the standard. For A307 Grade A, 75% of 36,000 PSI is utilized. A193 B7 uses 75% of the yield strength.
1) M8 are in inch-pounds; diameters M10 and larger are in foot-lbs. The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt’s minimum tensile strength.
What is the grade of torque lock nut clamp?
The prevailing torque lock nut clamp loads are listed at 75% of the proof loads specified for the appropriate grade bolt: Grade C – SAE J429 Grade 8, FNL Grade 9 – FNL Grade 9 bolt, Grade F – SAE J429 Grade 5, Grade G – SAE J429 Grade 8.
Where can I find torque to yield data?
Torque-To-Yield Bolts MUST NOT be reused. This data is presented for convienience only. Information sources are Courtesy of Helms Manuals, Mallett Cars, Ltd., “Chevy LS1/LS6 Performance” by Chris Endres & HP Books, “Chevy LS1/LS6 V8s” by Will Handzel and CarTech, Chevrolet Owners & Operators Manuals and my own data.