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Basically, cross drilling is the drilling of a round hole through the middle of a round bar. This is difficult, because it takes precision to drill on a round surface. It is necessary to use the right tools in this process, otherwise the whole manufacturing may not make it to completion. The main problem with cross drilling is that if the round workpiece is placed in a vice on an x-y fitting it seems so easy to move the workpiece until the tip of the center drill appears to be at the very center of the workpiece. Then once the use of the drill bit is in play, you will not find out if the hole is off center until after the drilling is complete.

When it comes to the manufacturing of aerospace parts and custom fasteners, cross drilling is a common technique many use to complete manufacturing. Various applications use the technique of cross drilling, such as drilling holes in crankshafts for oiling purposes and cross drilling services for brass, aluminum, copper, mild steel and plastic. The use of cross drilling is also for inserting a roll or dowel pin to transfer rotary motion, such as driving a wheel, engaging a clutch, cam or other mechanical connection.

Generally, cross drilling is a simple, but limited method. It is limited because suppose the workpiece is being held horizontally in a vice. Then a piece of round material the same diameter of the rod being drilled is fitted in the chunk of the drill. The vice is then moved so that when a ruler is placed along the side of the piece of material in the chunk it then just touches the side of the material in the vice.

While attending A&T, Chip became a party DJ and got involved in some nefarious businesses, which led to him leaving school for a season. After a brief stint as a “street pharmacist”, Chip met a group of guys at work who re-introduced him to Jesus Christ and showed him that living saved was not only do-able but practical and fun.   So, on a Wednesday night in August, Chip gave his life to Christ. After receiving salvation, Pastor Chip, with the blessing of his father and mother, joined Evangel Fellowship and became actively involved in ministry under the further tutelage of the late Bishop Otis Lockett Sr. Since that time, Pastor Rice has graduated from NC A&T with a degree in Communications and has also completed a Doctorate of Divinity from Master’s International School of Divinity. Dr. Rice has also authored the book, “The Cup: What They Probably Didn’t Tell You About Salvation”. He is a widely sought-after speaker and Master of Ceremonies. He facilitates seminars such as The Purpose of Music, and the wildly popular "Things You Should Know Before You Take Off Your Underwear." Pastor Chip is also the award-winning host of WNAA’s First Light Program that can be heard across the Triad and around the world at www.wnaafm.com. His goal is to present the Gospel of Jesus Christ in a fun yet dynamic and relevant way. Pastor Rice is the husband of Mrs. Thursday Brown Rice and the father of two wonderful children, Jasmine and Ethan.

Pastor Chip (as he is affectionately called by Maranatha’s members) is the son of Bishop Harvey and Mrs. Sadie Victoria Rice of the Mt. Calvary Holy Church of America, Inc. The New Jersey natives moved to Salisbury, NC when Pastor Rice was a small child and there he was educated in the Salisbury City School System. Upon high school graduation, Pastor Chip attended North Carolina A&T State University in Greensboro, and eventually decided to make Greensboro his home.

The better way of being sure that the hole is in the center is by using a cross drilling jig. Most of these jigs are based on the fact that a round object is being placed in a symmetrical V-shape then the center of the round piece lies above the vertex of the V. The only requirement is something to guide the drill bit. You do this by fitting the piece over the V. It has a hole in it to take either a part used to set it up or a part to take a drill bit. It then holds onto the bottom part using two slots, which means it can later be adjusted.

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There are nice benefits of using cross drilling for the manufacturing of custom fasteners. Let's take a look at these benefits.

Precise cross drilling is needed when a handle is to be held onto a shaft with a tapered pin. Of course, the tapered pin has the property that it will not fall out. However, it can incorrectly give the impression that the hole in the handle and the hole in the shaft will only ever be mated together one way round. And generally, there may be times when it is useful to put the handle on the other way round. Using a cross drill accomplishes these aspects.

Cross drilling can affect the structural integrity of the rotors by creating stress-riser, which leads to crack propagation from the drilled holes. This may reduce the lifespan and reliability of the rotors, especially under heavy load or high temperature conditions. The use of cross drilling also reduces the mass of the rotors, which lowers their heat capacity and resistance to warping. When it comes to cross drilling, it needs to be done carefully and with proper chamfering and radius of the hole edges to minimize the risk of cracking.

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