Boring Mills: Horizontal Or Vertical, Which Is Better?

Horizontal Boring Mills vs. Vertical Boring Mills

Both vertical and horizontal boring mills?are capable of performing a variety of drilling or boring operations both manually and automatically. The tool head and workpiece typically move along 3 axes known as the X-axis, Y-axis and Z-axis.

The X-axis is the cross travel, the Y-axis is the vertical travel, and the Z-axis is the main axis which drives the work piece toward the spindle. Additional axes include the C-axis, which is the work spindle itself and the B-axis, which is the centerline of the rotary worktable, if equipped.

The main difference between a vertical boring mill and a horizontal boring mill is the machine setup, workpiece setup and the machine’s tooling configuration.

Vertical Boring Mill

Vertical boring mills are also called vertical turret lathes. They operate very similar to an engine lathe if it were turned up on end, and can perform almost all common lathe operations. The machine can perform operations including turning, boring, facing, tapering, and cutting of external and internal threads.

Parts are formed in a vertical boring mill by the workpiece being rotated around its Y- axis while the boring head moves linearly, very similar to that of a vertical lathe.

Characteristics unique to a vertical boring mill include:

  • The workpiece is held by a horizontal table that rotates around a vertical axis
  • Non-rotating tools can be fed either horizontally or vertically with the use of the cross rail mounted turret slide
  • A side head which can be fed both horizontally or vertically

Vertical boring mill applications include machining: water turbine runners, turbine casings, ring gear blanks, large pipe flanges, locomotive tires, and machine tool tables.

Horizontal Boring Mill

Horizontal boring mills are capable of performing many different machining functions including facing, boring, shaping, tapping, reaming, drilling, contouring and milling.

They are used primarily for boring out large parts with the use of a horizontal spindle. This means that the machine’s spindle is parallel to both the ground and the work table.

One advantage of this style of machine tool is that very large parts can be placed on the machine’s worktable using an overhead crane. Parts larger than the table can still be milled, even if the part hangs off the sides of the table. The only requirement is that the part is stable on the worktable to prevent potential operator injury or machine damage.

The setup of horizontal boring millwork and tools are similar to those found in lathe and standard milling machines. Parts are fabricated by the work-piece being placed on a worktable while the boring head rotates around the X-axis, similar to a horizontal milling machine. In fact, horizontal boring mills have often been confused with horizontal turret lathes and the terms have been used interchangeably.

Boring Mill Types

The first boring mills were designed to create a rough cut of the part, which required a second machine tool to finish the part. Newer machine tools, known as precision boring mills, are capable of creating very detailed, finished parts.

The table type of boring mill, also known as the universal boring mill, is the most common as well as the most versatile.

Boring mills can be mechanically operated, but most modern machines use computer numerical controls (CNC), which deliver very precise and accurate machined parts.

The 2013 Toshiba Horizontal Milling and Boring Machine – Ascension Industries

Horizontal Milling and Boring Machines – Ascension Industries

Ascension Industries offers high quality turnkey manufacturing, machining and fabrication services with an array of top-of-the-line machine tools including two overhead 50-ton cranes.

In order to meet the needs of customers in the aerospace, metal-working, defense, automotive, turbo compressor, process equipment and automation industries, it’s important to have top notch machining centers and other machine tools.

For this reason, Ascension Industries recently decided to add the new Toshiba BF-130B horizontal milling and boring machine to their arsenal and replace the current Union machines throughout their facility.

More About Ascension Industries

Based in New York, Ascension Industries was founded in 1956. The provide high quality tooling, machining, automation systems and similar manufacturing services to original equipment manufacturers and other precision metalworking capable users.
Over the years they have prospered and expanded to offer their services to users of machinery and fabrication equipment as well as OEM customers.

They currently operate in a 170,000 square foot manufacturing area fully equipped with dual overhead cranes making nothing too big or too small to be manufactured here. They offer additional services as well including filtration and separation, electrical, grinding, machining, and more.

The company’s goal is to work with clients and provide full support from their initial idea all the way to the final installation by providing immediate complementary technical assistance, supplying of all materials, tooling, machining, fabrication, assembly, inspection and testing to the user’s specifications.
Ascension Industries not only provides a variety of extremely valuable services, they are also manufacturers of their very own equipment lines. They are the sole manufacturer of genuine FSD, Durco/Duriron, AquaCare, and Enzinger brand equipment and replacement parts.

Toshiba BF-130B Horizontal Milling and Boring Machine Specs

? Maximum Travel: X Axis – 236” / Y Axis – 118”
? Maximum Travel Speed: Rapid positioning of X & Y Axis of up to 393” per minute
? Maximum Machining Speed: 160” pre minute
? Automatic Tool Changer: Holds up to 60 tools
? Computerized Numerical Controls: TOSNUC 999 CNC system including extensive

There are several new features included in this newest model of milling and boring machine from Toshiba that will not only enhance productivity, but also allow the company to handle jobs too big for their other machines to handle.
New Features:
? Increased spindle feed rate and speed
? Quill type spindle provides easy work piece access
Possibly the most amazing new feature is the ability to put a signal point tool in the spindle and actually create a 118″ diameter bore or turn grooves like you would on a lathe. For Ascension Industries, this is the single most important new feature of the new Milling and Boring Machine.
The combination of Ascension Industries more than 50 years of machining, production, and fabrication expertise in conjunction with their new Toshiba BF-130B Horizontal Milling and Boring Machines makes a truly unbeatable pair in the manufacturing industry.