Posted by ScottyHOMEy on February 03, 2009 at 10:53:00 from (64.222.201.63):
In Reply to: Lug bolt pattern posted by GentleBen on February 03, 2009 at 10:25:21:
The first number is simply the number of lugs. The second number is the diameter of the circle on which teh lugs are centered.
The first one you cited would be called "five on 4 and three quarters", the second "five on 4 and a quarter".
On even numbered bolt patterns (sixes and eights) it's easy just measure center to center on two opposing lugs. On 5s, you have to get into a little trig. Measure the distance between the centers of two holes or lugs. Take half that distance, and divide it by 0.5878 (which is the sine of 36 degrees, half the angle between the lugs). That will give you the radius. Then just double that number to get the diameter.
Ex. You measure 2-15/16" between the centers of two lugs. Half of that is 1-15/32". Convert that to decimals and you get 1.4688. Divide by 0.5878 giving you a radius of 2.4987, making the diameter 4.9974". Call it 5" and chalk up the difference to a little inaccuracy in your initial measurement, and you have what would be called a "5 on 5" bolt pattern.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
