mactech mbmc portable boring system operating manual · 2017. 3. 20. · 4 inch mbmc portable...

Mactech, Inc. • 4079 Pepin Ave. • Red Wing, MN 55066PH: 651-388-7117 • TOLL FREE: 800-328-1488 • FAX: 651-388-0337 • www.mactechonsite.com

M A C T E C H P O R T A B L E M A C H I N I N G S O L U T I O N S4 INCH MBMC BORING BARM A C T E C H P O R T A B L E M A C H I N I N G S O L U T I O N S

ON-SITE MACHINING SOLUTIONS

Mactech 4 inch MBMC Portable Boring System

OPERATING MANUAL

SERIAL NO. ___________________

i Mactech Portable Machining Solutions4 inch MBMC Portable Boring System Operating Manual


Table of Contents

Introduction ................................................................................................................................................................. ii

Safety Precautions .................................................................................................................................................... ii

Description ............................................................................................................................................................... 1-1

Capabilities .........................................................................................................................................................................1-1

Tooling ...................................................................................................................................................................................1-1

Components ......................................................................................................................................................................1-1

Accessories .........................................................................................................................................................................1-1

Dimensions .........................................................................................................................................................................1-3

Installation and Operation ..............................................................................................................................................2-1

Installation and Operation Precautions..........................................................................................................2-1

Installation ...........................................................................................................................................................................2-2

Operation .......................................................................................................................................................................... 2-11

Cleaning and Maintenance ..............................................................................................................................................3-1

ii Mactech Portable Machining Solutions4 inch MBMC Portable Boring System Operating Manual


IntroductionThis manual is intended to describe basic setup and operation procedures. Specifi c applications may require unique confi gurations or procedures not described in this manual. Always use appropriate tools and techniques for your operation. Always follow site safety regulations. Never use the equipment in a manner that will harm people or damage the equipment.

Safety Precautions

Personal Safety

• Wear protective clothing, including safety glasses and steel-toe boots.

• Do not allow loose clothing or long hair near machine operations.

• Ensure there is adequate clearance for your operations.

• Do not rush the job. Read and understand all safety instructions and operating procedures before attempting any cutting operation. Call Mactech’s toll free number (800-328-1488) if any problems are encountered.

• Before connecting hoses to the machine be sure all components are tightly secured.

• Make sure the machine is secured to the work surface before starting.

• Do not touch or rest your hand on or near any moving parts or sharp edges.

• Disconnect hydraulic hoses before removing the machine from the work surface.

• Never move the machine while connected to the power source. Always turn off control valves and disconnect hoses before moving.

1-1 Mactech Portable Machining Solutions4 inch MBMC Portable Boring System Operating Manual


Description

The MBMC Portable Boring System is an on-site boring system capable of boring and facing of in-situ machinery. The MBMC system can cut in any position, at any angle. The feed mechanism allows machining along the full length of the boring bar, and stackable cutter heads reach to the largest diameters. An extremely rigid structure ensures precise machining and easy setup, even in the most challenging environments.

CapabilitiesLine Boring• 6 to 160 inch diameter bore machining capability.• Full length feed mechanism allows machining up to 24 feet length.• Cuts in any position, at any angle.

ToolingMactech carries a full line of tooling for boring, facing, grooving, milling and many other machining operations.

ComponentsRefer to the MBMC Portable Boring System Components fi gure. Major components include:• Boring Bar with full length Feed Screw • Mounting Bridges• Feed Box • Mounting Knees• Drive Head • Spider Bearing for I.D. mounting• Cutter Head • Spherical Tail Bearing• Tool Bit • Stop Collar

AccessoriesMactech carries a full line of accessories for the MBMC Portable Boring System. Custom confi gurations are our specialty. Contact your Mactech representative at 800-328-1488 for more information.



Components

MBMC Portable Boring System Components



Dimensions

MBMC Portable Boring System Dimensions

2-14 inch MBMC Portable Boring System Operating Manual Mactech Portable Machining Solutions


Installation and Operation

MBMC Portable Boring System Installation

NOTE: Before attaching the boring system to the workpiece clear your work area of all obstructions. Do not connect the power supply until the boring system is securely attached and ready for use.

Installation and Operation Precautions:

• The MBMC Portable Boring System is a precision, hand-fi tted machine. With proper use and maintenance it will give many years of trouble-free service. Do not hit any part with a hammer or other metal object. Do not try to force mating parts together. Do not over-tighten bolts and screws.

• Before setup and during operation of this machine, make sure all parts are properly lubricated. Fill the drive unit with 2 to 3 quarts (1.9 to 2.8 liters) of non-foaming 90W gear oil. Coat the bar, lead screw and bores of the components mounted on the bar with 90W gear oil. Lubricate all fi ttings and feed box gears with high-quality bearing grease.

• During operation keep chips and other material away from machine components. It is very important to keep the feed screw and feed screw slot clean. Chips and metal dust can cause excessive wear of the cutter head feed nuts.

• Whenever possible, use jack stands or other means to support the boring system components to assist in setup.

Installation

1. Before installing any boring system components, select the feed box gear setup for your application. The feed gear setup is dependant on your desired feed rate, rotation direction and feed screw threads per inch (TPI). Figure 1 shows the feed gear setup information for 4 and 8 TPI feed screws.

NOTE: When installing the boring system at any position other than horizontal, use a set collar to prevent the tool from sliding on the bar. The set collar may also be used for setting a specifi c depth. When machining in other than horizontal position, make sure to keep metal chips from entering boring system components.



Figure 1 - Feed Box Gear Combinations



2. Prepare the workpiece for mounting the boring system. The mounting setup must have a fl at mounting surface, perpendicular to the bore, to ensure accurate machining.

NOTE: When using a fi xture to mount the boring system, never weld directly to the mounting knee or bridge. Attach the mounting knee or bridge to the fi xture with hardware, and weld the fi xture to the workpiece.

3. Before installing the mounting bridge and mounting knees, determine the required clearance between the workpiece face and mounting bridge. To access the tool bit during operation, the tool bit must travel out of the workpiece bore. The setup may require a fi xture or blocks to provide space for the tool bit to completely clear the bore. The tool bit is positioned on one side of the cutter head, so the cutter head may be turned 180° to allow clearance away from the workpiece. See Figure 2.

Figure 2 - Tool Bit Access



4. Attach two mounting knees to the front and rear faces of the workpiece. Make sure the mounting knees are centered across the bore center, and within the adjustment range of the mounting bridge. See Figure 3.

Figure 3 - Attach Mounting Knees to Workpiece

5. Install the tail bearing (spherical or fi xed) onto the rear mounting bridge. Center the bridge and tail bearing assembly to the workpiece bore and install onto the mounting knees. Hand-tighten the four screws on the mounting bridge around the diameter of the tail bearing. See Figure 4.

Figure 4 - Install Mounting Bridge and Tail Bearing



NOTE: Use spherical bearings whenever possible for easier alignment of the boring bar to the bore centerline. When using a fi xed tail bearing on the rear bridge, and the drive head mounted directly to the front bridge, it is very important that the front and rear bridges are perpendicular to the boring bar. This will help eliminate excessive tension and binding of the fi xed bearing and drive head. The use of spherical bearings on the front and rear bridges will allow movement in all directions, eliminating tension and binding.

6. Install the drive head onto the front bridge. A spherical bearing may be used between the drive head and mounting bridge to assist in boring bar alignment. Align the center of the drive head with the center of the mounting bridge. Hand-tighten the four screws on the mounting bridge around the diameter of the drive head. See Figure 5.

Figure 5 - Install Drive Head



7. Slide the boring bar with feed box through the drive head and front and rear mounting bridges. Align the feed screw with the keyway of the drive head. See Figure 6.

Figure 6 - Install Boring Bar with Feed Box

8. Determine the bore size to be machined. Set up the cutter head with extensions, tool holders and tool bit as required for the machining operation. Temporarily remove the rear mounting bridge with tail bearing to allow the cutter head to be installed onto the boring bar. See Figure 7.

Figure 7 - Typical Cutter Heads



9. To install a one-piece cutter head, remove the boring bar end cap, clamp nut, washers and bearing from the boring bar. Align the feed nut on the cutter head with the feed screw, and thread the feed screw into the brass nut with the feed box crank handle. Use the four set screws to snug the cutter head against the boring bar. Do not over-tighten, the cutter head must be able to travel with the feed screw. Install the end cap and hardware, and mounting bridge with tail bearing. Use the crank handle to move the cutter head to its approximate starting position in the bore. See Figure 8.

Figure 8 - Install One-piece Cutter Head



10. To install a split-frame cutter head, remove the boring bar end cap, clamp nut, washers and bearing from the boring bar. Open the cutter head by removing the four cap screws holding the frame together. Slide the cutter head feed carriage over the feed screw with the slot facing out. Clamp the split cutter head over the feed carriage, aligning the feed nut with the feed carriage slot. Make sure all fasteners are secure. Install the end cap and hardware, and mounting bridge with tail bearing. Use the crank handle to move the cutter head to its approximate starting position in the bore. See Figure 9.

Figure 9 - Install Split Frame Cutter Head

11. Install the mounting bridge and tail bearing that were removed for installing the cutter head.



12. Install spider bearings and set collar onto the boring bar. Clamp the set collar onto the boring bar as a reference guide, or to help retain components in a vertical setup. Align the spider bearing feed nut with the boring bar feed screw. Clamp the inner bearing around the boring bar. Clamp the outer bearing around the inner bearing. Select the length of adjustable legs for your application and install into the spider bearing. See Figure 10.

Figure 10 - Install Spider Bearings and Set Collar

13. Install the drive motor onto the drive head. Align the drive key with the slot in the drive shaft. See Figure 11.

Figure 11 - Install Drive Motor



14. To precisely align the boring bar, loosen the two nuts on each mounting bridge. Use the four screws on the mounting bridge to adjust the boring bar position. When the boring bar is aligned, loosen the four screws on each mounting bridge to prevent binding, and tighten the mounting bridge nuts to secure the boring bar in place. See Figure 12.

Figure 12 - Align Boring Bar

Figure 13 - Lock Boring Bar

15. Lock the boring bar in place with the set screw located inside the drive head. Remove the pipe plug on the side of the drive head to access the set screw. Tighten the set screw against the fl at face on the boring bar. See Figure 13.



16. Secure the anti-rotation bar to a stationary object or structure to prevent the feed box from rotating while operating the machine. See Figure 14.

Figure 14 - Secure Anti-rotation Bar

Operation

1. Install the tool bit into the cutter head. Use the feed box crank handle to position the cutter head at the start of the cut.

2. Make sure the power supply is off. Connect the power supply hoses to the drive motor.

3. Close the fl ow control valve. Start the power supply.

4. Open the fl ow control valve to start the machine.



Cleaning and Maintenance

Cleaning and maintenance are critical steps to maintain the operation and life of the boring system. Clean and maintain the boring system after each use and before storage.

• Wipe down the entire system to remove oil and metal chips. Clean metal chips out of bearings, mounting bridges, feed screw, feed screw slot and keyways.

• Lubricate the boring bar, feed screw and bores through components with 90W gear oil.

• Grease all fi ttings and feed box gears with high grade bearing grease.

• Apply a rust inhibitor to the outside surfaces of all components before long-term storage.

• Do not store the machine in the shipping crate until excess surface oil and metal chips are removed and a rust inhibitor is applied.

mactech mbmc portable boring system operating manual · 2017. 3. 20. · 4 inch mbmc portable...

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