# grade 8 bolt torque chart

Lubricate all contact areas of the bolts and washers. Training Online Engineering 0000001473 00000 n mD��A�v�t^��1 ���/:#2!�y�hf��`�t��!�şAmq�@���A�g�9�@��Xˌ�� ۻ��/�s���fww��ޮn��ns`���v��L�hX�\�v�a������y��G�tʑ�2��.��e��oA=�A! DFM DFA Training All calculations are for Coarse Thread Series (UNC). The following chart estimates the applied tension clamp force at a defined torque and friction for SAE J429 Grade 2, 5 and 8 bolts. Grade: Finish: Diameter: Calculate Torque: ? Proof load, stress area, yield strength, and other data is based on IFI 7th Edition (2003) Technical Data N-68, SAE J429, ASTM A307, A325, A354, A449, and A490. 0000001906 00000 n ,ÿağu pæ�ÂQm>˜3a˜LÁ�;—µZÃújf+éõ?â’n�¤Ö¿g³�ãûT4€~�”° ¤ª¨\$,ğhç‰×=ÉoñÕ�º(½†ş²oÎıÙW«ŒúpåN»–ro‡MçûÇïÚ†“Y…‰Ôhğq]' ò These torque calculations are estimates and are only offered as a guide. Under/over tightening of fasteners can result in costly equipment failure or personal injury. ; 1/4 20 17 13 8 16 5/16 18 28 21 16 34 3/8 16 41 31 29 … K=0.18 for zinc plated and dry conditions Online Books & Manuals 0000004685 00000 n 0000013534 00000 n

.style9 {font-size: 10} Torque Design and Applications. Downloads Steel: SAE Grade 7 133,000 psi Med. // -->, Fastener and Screw Torque Design and Equation and Calculator | Engineers Edge, Calculating Assembly Torque per ISO 68 & ISO 724, Torque Wrench Adapter Reduced Arm Calculation, Torque Wrench Adapter Extended Calculation, GD&T Training Geometric Dimensioning Tolerancing. trailer <]>> startxref 0 %%EOF 30 0 obj<>stream *OzИ=\�����D[��2!�|�=<>Ru��ґPQ��U?g��l�i�=;�}{sxXn��gWo���@q~~�.��d���4�\*BtK'�Ɏ8+���⌜� |"�M�F��c����~y�ܿ��-���}�|_�Ñ��j�M�i.�y:�m/"�m�aAl�\$���~L�K SAE J429 grade 8 bolts do not exceed 1.5 inches diameter.

For longer fasteners, the torque is reduced significantly.

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Torque values calculated from formula T = KDF, D is the nominal diameter,

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Steel Grade SAE 5 SAE 8 Socket Head Cap Screws Property Class 8.8 10.9 12.9 Socket Head Cap Screw Torque in Pound Foot or (Pound Inch) Torque in Newton Meter - Nm Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. Engineering Forum 0000002667 00000 n The given below ASTM A354-BD / SAE GRADE 8 Bolt Torque Chart provides you with torque of various corresponding bolt sizes along with its TPI, clamp load and proof load. font-size: 12px; // --> -->, ANSI Hardware Design Data All rights reserved. Engineering Videos F is the clamp load

} Engineering Calculators 0000002700 00000 n This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. Engineering Videos | Contact. )ǭpO.���I�"� If you exceed the proofload value when tensioning the bolt, you run the risk of bolt failure.