Some bolts may vary from the standard thread length. Maximum grip length 116 increments nominal shank diameter 132 increments lubricant code see chart finish code see chart material strength level see chart head configuration see chart family type eddie bolt 2 with spline loktm recess prefix els 1 20 n n 8 6 y eddie pintm part number code example spline loktm recessnew numbering system.
What Are The Calculation Differences For Bolt Grips According
Grip length of bolt. Thats an important consideration when dealing with critical applications that involve a lot of vibration namely aircraft and racing. To understand how advance steel automatically calculates the grip length lets see an example. If the grip is too short the threads of the bolt will extend into the bolt hole. As a rule no more than one thread should be within the bolt hole because vibrations can cause the threads to ream out the hole. If your application falls between two grip lengths you can add one or two more washers to a bolt with the next longer grip. An insufficient unthreaded length results in the threads extending into the hole and places the dowel shear load onto the threads which may cause fretting wear on the hole.
No more than two turns of the thread should be within the hole. The unthreaded grip length should be chosen carefully to be around the same length as the thickness of the material and washers through which the bolt passes. If you have any questions please contact our sales. Grip lengths are in 18 increments. On the parameters tab the grip length bolt length and projected lengths can be configured. This table can be used as a guide for bolt length estimation for our structural bolts.
In addition if a bolt is too long or too short its grip will usually be the wrong length. An960 washers are 116 thick 132 thick for the l version. Grip length is the length of the unthreaded portion of a bolts shank. An overly long unthreaded length prevents the nut from being tightened down correctly. As shown in figure 5 2 the grip length should be approximately the same as the thickness of the material to be fastened. If beveled washers are used add an additional 516 inch to the no washer column for each bevel washer.
Add the length below to grip to determine bolt length required. Trying to make sense of all the different screw and bolt thread lengths can be a real challengeeven for the most knowledgeable of professionals. An bolt nomenclature follows this format. From the bolt list select one of the bolt assemblies.
Gallery of Grip Length Of Bolt
