Engine Mounting Bolt

Standard Bolts are used for mounting the equipment to the flange, driven members to the crankshaft end bolt and the engine to the base For most applications, an SAE grade 5 bolt is sufficient. For chipper shredder application, an SAE grade 8 bolt must be used on the crankshaft end due to the higher shock loads.

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Detailed Description for Engine Mounting Bolt

Standard Bolts Standard Bolts are used for mounting the equipment to the flange, driven members to the crankshaft end bolt and the engine to the base (all h/s and some v/s). For most applications, an SAE grade 5 bolt is sufficient. For chipper shredder application, an SAE grade 8 bolt must be used on the crankshaft end due to the higher shock loads. 

Thread Forming Bolts Thread forming bolts are typically used on vertical shaft engines which utilize blind holes – holes that are not completely drilled through – for mounting the engine to the application. After a considerable amount of testing at the EAC, it is highly recommended that a thread forming screw of the tri-roundular type be used (this type is also called a tri-lobe and tri-flow screw). This design features a modest assembly torque, a high strip torque, and tends to be self-aligning if assembled on an angle. 

HOW TO USE A FASTENER  Lock washers, either a split or star type, should always be used. They help make sure that the nut does not loosen.  Never use a lock washer directly onto an aluminum surface. Lock washers have the tendency to “eat” their way into the aluminum and loose torque. Always make sure that steel is on both sides of the lock washer.  A flat washer should be used in between the head of the bolt and the aluminum casting when the bolt is inserted from the top side of the engine. This provides for an even distribution of the bolt load.  Lock nuts, such as a ny-lock or crushed nut, are appropriate for any installation. 

 

 


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