The Line Boring Book - A Vocational Training Course -
How to Build and Operate Portable Line Boring Machines by Earl Hansen

Powerful Hydraulic
Line Boring Machines, Plus. . .

The Line Boring Vocational Training Course







The Line Boring Book, Blueprints and DVD Video Series
The only place on the web that teaches everything
you need to know about Line Boring.

(A)The Line Boring Book is 332 pages with color photo illustrations.

It teaches how to do it all:
(B) Large size (11" x 17") book of 50 Blueprints: Build your own powerful 10 to 25 hp hydraulic line-boring, end-boring and drilling machines from off the shelf equipment utilized in other industries. Build an array of tooling— including inspection tooling, fixtures and boring bars from 1" to 3" diameter and hollow boring bars up to 8" in diameter— all with adapters for large bores. Remove as much as 1/2" steel per side, totaling an astonishing 1" on the first pass. Blueprints are also available in metric.
(C) 8 Hours of DVD Videos Teaching Line Boring: They were filmed on the job and show dozens of machine operations as detailed in the book. They cover setups, inspection, multiple precision-matched boring, 1/2" cuts per side and more. These DVDs can be viewed on your television or computer.

This Vocational Training course teaches Line Boring and how to build all the equipment needed. You will save ten’s of thousands of dollars and you will have a superior Heavy Duty Hydraulic Line Boring machine. My innovative method for building these Line Boring and End Boring Machines is simple. Just following my computer generated blueprints.

Is it Cost Effective to build your own Line Boring Machines? Constructing a heavy duty hydraulic boring machine (that can run 24/7) is not difficult or expensive. Our course presents a new way to build powerful line boring machines. You will need a number of off-the-shelf items that are used in other industries and are readily available plus a few parts made in a machine shop. We have operated these durable machines for over 20 years with no failures.

An investment of as little as $2,000 will enable you to line bore inside diameters from 3/4 to 5 1/2". Chapter 6 in The Line Boring Book gives information on how to build and operate this cost-effective boring system! Anyone who is mechanically inclined, familiar with machines and with access to a lathe and a milling machine, can easily follow the blueprints and instructions.






This may look complicated but you can easily build this inexpensive heavy-duty hydraulic line boring machine

This Vocational Training Course, primarily teaches precision Line Boring and End Boring. It includes 8 hours of DVD Videos, detailed reading material and blueprints. It includes exact details for building equipment to meet all your line boring and end boring needs. By using a full range of speed reducers and feed systems, you will be able to build dozens of powerful hydraulic machines from 10 to 25 horsepower. These inexpensive easily built machines are capable of boring any size inside diameter from 1” to 48”, round and straight, using boring bars from 3/4” to 3” and hollow boring bars to 8”. They are so powerful they can remove as much as 1.000” of steel per pass (1/2" per side) to precision tolerances. See Table of Contents

This Vocational Training Course will pay for itself in 1 to 2 days of Line Boring

Is it Cost Effective to do your own Line Boring? How many times has the final bill on the machine being repaired out of shop, exceeded your company’s budget—possibly doubling or tripling your allocated repair budget? From conversations with my customers over 42 years, the answer is far too many times. This Vocational Training Course gives you the option not only to save large sums of money, but gives you complete control of all line boring in-house. Portable Line Boring is a very diversified method for restoring damaged machine parts and for manufacturing new, very large parts. It is fast and precise and when combined with precision honing, the degree of accuracy gives superior results. Onsite repair capabilities will save expensive down time and large transportation costs. Top of Page

Cat Loader
988 CAT articulated hitch
using 1 15/16" boring bar

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Hydraulic End Boring
You can easily build this powerful
hydraulic end-boring machine

This Hydraulic End Boring Machine (fully detailed in 6 drawings in the blueprint book) is being used on this job to bore (1) 13” diameter bore X 3" deep. Also the gun drilling of (4) 2 1/4” holes through 6” plate lubricated by high pressure oil. This was duplicated 42 feet away on the opposite end of the machine using true laser positioning within .020” true positioning.

About the Author
My name is Earl Hansen. From 1945 to 1963 I was the owner operator of a 40 man aircraft parts machine shop in southern California. In 1963 I moved to Willits, California (130 Miles North of San Francisco, 30 Miles from the Pacific Ocean) and opened a machine shop specializing in precision Line Boring.

For the next 42 years I designed and built many line boring and end boring machines complete with an array of tooling. I am a master machinist and have over 60 years experience as a self-employed machinist with a specialty in mechanical engineering, I also have US Patents for high energy ecological systems.

I planned on writing this Self Teaching Course on Line Boring for 25 years and spent 3 1/2 years writing this book. Using reverse engineering on the many machines and tooling I have built and designed, I created 50 blueprints that are referenced in the book. The 8 hours of DVD's in this instructional set have been edited from over 50 hours of on the job work I performed.

(more about the author) Top of Page

This 1 ½” heavy-duty hydraulic boring machine
is easy to make and will perform for many years.

Line Boring an excavator reach arm
Line Boring an excavator reach arm
You can easily build this machine

This 1 15/16” heavy-duty hydraulic line boring machine
can bore up to 13" inside diameters.

Examples of Line Boring

Example # 1
Remco Hydraulics Inc., and The State of California
(Feather River projects)
Date of job 1966

Remco Hydraulics manufactured some of the worlds largest hydraulic cylinders. This job called for line-boring the flanges on two 32" inside diameter hydraulic cylinders that were each 45 feet long. The cylinders were made in 3-15 foot sections bolted together utilizing - 32 = holes machined in each of the flanges. Four of the flanged holes were to be precision machined and inter-locked together with dowel-pinned-bodied threaded bolts to lock each section together.

We were contracted to design a machine to bore 16 holes (with 1 13/16" inside diameter) with a tolerance of +/- .00075" X 23" long each. We designed a special boring machine that would allow these bores to be machined in a space of 2 5/16" (between the outside radius of the wall of the hydraulic cylinder and the center of the machined bore). This very difficult task worked very well using my machine.

The State of California contracted me to line bore these two assembled 45 foot hydraulic cylinders in place on location at the Oroville Dam site in Northern California (California's famous Feather River Project). These cylinders are still in used today to control the flow of water to the hydro-electric power plant.

Example # 2
Caterpillar Excavator

This job called for a set of four very heavily welded 6 3/4" inside diameter (ID) bores each 4" long. The first pass removed 1/2" of steel per side. That is 1.000" of steel removed from the bore leaving only .050" for the last passes. This job was honed to pin size holding a tolerance of +/- .0005 ". The carbide tipped tool bore three of these IDs before needing to be sharpened. The typical time for each bore was about 10 minutes, that is 40 minutes to remove 1" of solid welded steel from a 6 5/8" bore 16" Long. That is remarkable portable line boring.

This was accomplished with a portable gasoline driven 18 horse power hydraulic pumping system sitting in my service truck parked outside the building with double 100 foot hydraulic HD 1/2" hoses driving a hydraulic boring machine 70 feet away. NOTE: See Chapter 5. "How to build Hydraulic Boring Machines" and blueprints section = MA - 101 to 106 dealing with Boring Bar design and LA - 400 - 401 dealing with Layout and Inspection Systems.

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    This co
    mplete teaching course will pay for itself in a day or two
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    Local Office Number in California: (707) 456-9761

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© 2013 Earl Hansen