Portable Line Boring Machine Equipment for fast concentric bore repair of holes on Backhoes, Dozers, Endloaders, Scrapper Hitches, Tractors, Excavators, etc - using a standard magnetic drill press. Made in USA.

Customer photo shows our 72" boring bar reboring 4 holes in line on a large bucket. The mag drill is held by our weld-on safety base in case of power failure. Also notice the 2 just bored and sleeved holes above.

All you need is our line boring equipment, a mag drill, welder, grinder and you can do it.

Q88-E Hole Boring Rig:
$1495 with Milwaukee Drill or $1295 without drill.
Bores single holes or 2 holes in-line from 1" to 1.5 inches diameter spaced up to 16 inches apart using 1/2" drill.
Click to read how to use the Q88E.

Click to see a video of the Q88 Portable Line Boring Equipment

7/8" dia x 28.5" long Boring Bar -chrome induction hardened and precision ground 100,000 PSI tensile strength alloy steel, resists scoring to still fit the bearings use after use. 1/4" cutting tool mounting holes are spaced 4" apart. 1/2" shank with 3 flats for driving with drill chuck.
Milwaukee Electric Drill - Variable speed, high torque and 1/2" chuck.
Drill Press Adapter with bearing - with manual feed handle to move drill.
Velcro Strap - to hold speed trigger.
2 Self-aligning Bearings - the I.D. of the bearings have a perfect fit for the shaft. Easy mounting holes.
2 Bearing Plates and 6 Standoffs - 5/8 inch thick for easy weld on and vibration free machining.
2 Centering Cones - for quick concentric alignment of the boring bar and bearings in holes.
6 Cutting Tools - 5 carbide boring and 1 cobalt boring cutter.
1 Electronic Caliper - Measures 0" to 6" with digital readout to .001" in/mm
1 Solid wood case - For holding and transporting the equipment.

Rebores multiple holes in-line from 1.75 to 5.5 inches diameter spaced up to 38" apart.
(44mm to 140mm diameter holes up to 965mm apart).
Q150-L: $2395. Call 773-334-5000 to order this equipment. M - F, 9am - 5pm
Click to request a formal quote and more information

The standard Q150-L comes complete with everything you need except the mag drill:

1.50" dia x 54" long Boring Bar - made from highest quality chrome hardened and precision ground 100,000 PSI tensile strength alloy steel, resists burrs and scoring to still fit the bearings use after use. Cutting Bit mounting holes are spaced 5 inches apart. 3/4 diameter shank with 3 flats for solid gripping by your mag drill chuck.
3 bolt-on self-aligning Bearings - the I.D. of the bearings have a perfect fit between bar and bearings, which insures holes can be bored to near zero TIR runout.
3 Bolt-on Bearing Plates and 4 pairs of Standoffs - 3/4 inch thick for easy weld on and vibration free machining. Easy to unbolt for measuring. Black oxide coated to prevent rust.
1 Drill Base Adapter with built-in bearing - Important safety device to hold mag drill and boring bar in case of power failure. Also designed to mount the BOA-308-AMT bore welder.
2 Centering Sleeves - for concentric alignment of the boring bar and bearings in small holes.
2 Centering Cones - for quick concentric alignment of the boring bar and bearings in larger holes.
7 Carbide Cutting Tools - 3 types of boring and 1 facing. Held in the boring shaft by heavy set screws. Modifiable shank long enough to rebore 5.5" diameter.
1 Digital Electronic Caliper - Measures 0" to 8" with digital readout to .001"
1 Manual Inside Caliper - Prongs measure around boring shaft inside bores up to 8"
1 Solid Wood Case - Padlockable, with 2 handles, and dolly wheels.

Optional Milwaukee Portable Magnetic Drill Press with chuck: $1595. (see below)
Variable speed, 11" stroke. You need this if you do not already have a mag drill with 3/4" chuck.
Optional Adaptor to bore up to 8 inches (200mm) diameter (with 8" diameter cones and extra long bearing mounting plates): $595. extra
Optional BOA-308 Bore Welder Attachment: $5995. extra
Optional 36" long short bar for easy close hole boring: $595. extra
Optional Q88A 7/8" x 29" Boring Bar Kit for use with Q150 equipment - bores holes from 1" to 1.5" diameter up to 16" apart. Also includes adapter bushings and cones: $750.
Optional Ajustable centering/measuring tools: $95. each - these mount inside boring bar
Optional Dial Indicator Bore Gage (measures 2"- 6" within .001"): $89. extra (see below)
Extra Cutting Tools: $14. each (minumum purchase is quantity of 10)

Rebores multiple holes in-line from 1.75 to 5.5 inches diameter spaced up to 56" apart.
(44mm to 140mm diameter holes up to 1425mm apart).
Q150-XLS: $2995.
Click to request a formal quote and more information

The standard Q150-XLS comes complete with everything you need except the mag drill:

1.50" dia x 72" long Boring Bar - made from highest quality chrome hardened and precision ground 100,000 PSI tensile strength alloy steel, resists burrs and scoring to still fit the bearings use after use. Cutting Bit mounting holes are spaced 5 inches apart. 3/4 diameter shank with 3 flats for solid gripping by your mag drill chuck.
1.50" dia x 36" long Boring Bar - for easy close hole boring.
3 bolt-on self-aligning Bearings - the I.D. of the bearings have a perfect fit between bar and bearings.
3 Bolt-on Bearing Plates and 4 pairs of Standoffs - 3/4 inch thick for easy weld on and vibration free machining. Easy to unbolt for measuring. Black oxide coated to prevent rust.
1 Drill Base Adapter with built-in bearing - Important safety device to hold boring bar and mag drill in case of power failure. Also designed to mount the BOA-308-AMT bore welder.
2 Centering Sleeves - for concentric alignment of the boring bar and bearings in small holes.
2 Centering Cones - for quick concentric alignment of the boring bar and bearings in larger holes.
7 Carbide Cutting Tools - 3 types of boring and 1 facing. Held in the boring shaft by heavy set screws. Modifiable shank long enough to rebore 5.5" diameter.
1 Digital Electronic Caliper - Measures 0" to 8" with digital readout to .001"
1 Manual Inside Caliper - Prongs measure around boring shaft inside bores up to 8"
1 Solid Wood Case - Padlockable, with 2 handles, and dolly wheels.

Optional Milwaukee Portable Magnetic Drill Press with chuck: $1595. (see below)
Variable speed, 11" stroke. You need this if you do not already have a mag drill with 3/4" chuck.
Optional BOA-308 Bore Welder Attachment: $5995. extra
Optional Adaptor to bore up to 8 inches (200mm) diameter (with 8" diameter cones and extra long bearing mounting plates): $595. extra
Optional Q88A 7/8" x 29" Boring Bar Kit for use with Q150 equipment - bores holes from 1" to 1.5" diameter up to 16" apart. Also includes adapter busings: $750.
Optional Dial Indicator Bore Gage (measures 2"- 6" within .001"): $89. extra (see below)
Optional Ajustable centering/measuring tools: $95 each- these mount inside boring bar
Extra Cutting Tools: $14. each (minumum purchase is quantity of 10)

Q150-E5: $4590. Rebores holes in-line 1.75 to 5.5 inches (140mm) diameter.
Q150-E5Auto: $6590. Rebores holes 1.75 to 5.5 inches with Fein Autofeed.
Q150-E8: $5095. Rebores holes in-line from 1.75 to 8 inches (200mm) diameter.
Q150-E8Auto: $7095. Rebores holes 1.75 to 8 inches with Fein Autofeed.
Call 773-334-5000 to order this equipment
Click to request a formal quote and more information

Q150-E5 comes with:
1.50" dia x 72" long Boring Bar - made from highest quality chrome hardened and precision ground 100,000 PSI tensile strength alloy steel, resists burrs and scoring to still fit the bearings use after use. Cutting Bit mounting holes are spaced 5 inches apart. 3/4 shank with 3 flats for solid gripping by your mag drill chuck.
1.50" dia x 36" long Boring Bar- for easy close hole boring.
1 Milwaukee Portable Magnetic Drill Press - with 3/4" chuck, 11" stroke and variable speed.
1 Drill Base Adapter with built-in bearing - Important safety device to hold mag drill and boring bar in case of power failure. Also designed to mount the BOA-308-AMT bore welder.
3 Self-aligning Bearings - the I.D. of the bearings have a perfect fit between bar and bearings, which insures holes can be bored to near zero TIR runout.
3 Bolt-on Bearing Plates and 4 pairs of Standoffs - 3/4 inch thick for easy weld on and vibration free machining. Easy to unbolt for measuring. Black oxide coated to prevent rust.
2 Centering Sleeves - for concentric alignment of the boring bar and bearings in small holes.
2 Centering Cones - for concentric alignment of the boring bar and bearings in holes up to 5".
7 Carbide Cutting Tools - 3 types of boring and 1 facing. Held in the boring shaft by heavy set screws, modifiable shank.
1 Digital Electronic Caliper - measures 0" to 8" with digital readout to .001"
1 Manual Inside Caliper - Prongs measure around boring shaft inside bores up to 8"
1 Solid Wood Case - padlockable, with 2 handles, and dolly wheels.
Q150-E8 is same as E5 but also comes with:
1 Adaptor to bore up to 8 inches (200mm) diameter - heavy duty solid steel. Holes carbide cautter out far enough for 8 inch diameter holes.
3 Extra wide bolt-on Bearing Plates - to bridge over 8" diameter holes.
2 Centering Cones - for concentric alignment of the boring bar and bearings in holes up to 8".

Q150-E5Auto or Q150-E8Auto: is same as standard Q150E but comes with the Fein KBM-80Auto Magnetic Drill Press with Autofeed instead of the Milwaukee magnetic drill press. • Operates Manual feed or Automatic feed with digitally controlled drill feed • Uses 120 Volts Electricity • 3/4" chuck to fit our boring bars • 11" total stroke length • 5.7" stroke using auto-feed • Variable three-speed gearbox, 110 to 580 rpm • Adjustable position base • Automatic Lubrication for hole boring • Weight: 58 Lbs. • Quality made in Germany

Optional BOA-308 Bore Welder Attachment: $5995. extra
Optional Q88A 7/8" x 29" Boring Bar Kit for use with Q150 equipment - bores holes from 1" to 1.5" diameter up to 16" apart: $750.
Optional Dial Indicator Bore Gage (measures 2"- 6" within .001"): $89. extra (see below)
Optional Ajustable centering/measuring tools: $95. each - these mount inside boring bar
Extra Cutting Tools: $14. each (minumum purchase is quantity of 10)

Customer photo showing how the bearing mounting plates are connected to standoffs that are tack welded in place. Notice the finished hole in the upper right.

Customer photo shows our Q150S Line Boring Machine boring 2 holes in line with a Milwaukee Mag Drill. The manual feed allows you to control the pressure to save cutting bits. Bunge cord would help.

Photo shows the Q150S with oversize adapter attached to a customers mag drill turning a rough torched hole into a finished 6 inch diameter hole. We have 18" long boring bars.

Close up photo shows a finished 6 inch diameter hole that was also counterbored 1/16 deep by the Q150S. Hole was originally torch cut by customer and then bored out smooth.

Customer's photo shows typical assembly of line bore equipment with Milwaukee magnetic drill. A chain was used to lift magnetic drill press in position. He used 3 bearings to reduce vibration of boring bar. If you look closely, you can just barely see the cabide cutting bit sticking out of the shaft next to the hole on the left side.

BOA-308-AMT Welding Package $6095.
(only $5995 if purchased with our Q150 Boring Equipment)
This bore welder system is for fast welding in bores from 1.50" (32mm) to 8.0" (204mm) diameter. Connects to your Wire Feed MIG Welder with free adapter.
• Compatible with all new Q150 line boring systems
• Pass-through drive system features telescoping, reversible torch extension with precision lead-screw feed ensures accurate, repeatable weld bead placement ensuring proper bead to bead and bead to base metal penetration (weld thickness is easily adjusted by increasing or decreasing torch speed and wire feed speed)
• Durable corrosion-resistant construction throughout
• Lockable clutch allows single-plane first welds
• Easily adapted to your existing MIG wire feeder and power supply
• Easily adapted to a variety of boring bar systems using standard BRS interchange kits
• Pivoting torch head allows system to weld in large range of bore sizes with no torch change
• All weld nozzles are electrically isolated, thread-on design
• All weld tips are straight thread-in design; easily replaced and inexpensive
• Excellent telephone tech support
Package includes:
• Adapter to fit your MIG welder
• Weld-on mounting bracket
• Custom heavy duty aluminum carrying/storage case
• Arc start / stop / interrupt switch
• Power cord • Operators manual • Tool kit
• One piece motion device and controller with eight position borewelder mount
• 1.25" stainless steel support tube
• Mini diffuser
• Mini nozzle (insulated)
• Standard diffuser
• (2) .8mm (.030") Stub tips
• (2) .8mm (.030") Standard tips
• Standard nozzle (insulated)
• Stub nozzle (insulated)
• Standard torch assembly with 24" extension tube and 120" conduit
Click to request more Bore Welder info

Options:
• Auto-skip upgrade (you can add this at a later date)
• MIG Power supply or wire feeder
• Outside diameter torch
• Face welding torch
• Extra large internal diameter welding components (up to 37" dia)
• Bore welder to boring bar interchange kit (allows units to share single support)

Be careful not to bend the boring bar when installing the magnetic drill press.
11) On the Safety Adapter Base; tighten the 4 side clamping bolts against the drill magnet base. In case of electrical power failure, such as blown fuse or bad electrical cord, this is to help prevent the magnetic drill from injuring you and bending the shaft.
12) Insert cutting tool into boring bar. Set screw in place to proper dimension for cutting.
13) Spray cutting oil in hole often. If you cant find any, WD40 will still work. Check often to make sure the drill chuck is still tight on the shank. Vibration can loosen it.
14) Begin cutting at low RPMs. You should be able to remove up to 1/32 per side with each pass. Keep the carbide tool bits at low RPMs (160 max rpm for 5" dia, 225 max rpm for 3.5" dia, 400 rpm max for 2" dia). If the cutting tool is fighting hard, apply less pressure, to make the carbide cutting tools last longer.
15) The cobalt steel cutters are great for removing high spots from welded holes or for finishing. The left hand carbide tools are for boring. A carbide facing tool and a carbide chamfering cutter are also included.
ALWAYS WEAR SAFETY GLASSES ! * ALWAYS KEEP HAIR, CLOTHING, HANDS AND FINGERS CLEAR !
Do not rush. There is no substitute for using caution and common sense.
There are usually two options to repair pivot holes on heavy equipment:
16 - Method A) Holes can be welded and then bored back to the original specs. Unless you purchase a Bore Welder such as the BOA-308 this is time consuming because it requires a lot of welding. Original Spec size is the hole diameter specified by the manufacturer (such as Caterpillar) to fit the pivot shaft, or if there is supposed to be a bushing, then spec size is the hole sized to press fit the bushing. Grind off or bore out galled metal first, because if you weld on top of galled metal the weld will harden too much and you will waste many cutters and a lot of time trying to bore the hard weld in the hole. Same advice goes for removing old grease and oil since they can oil harden the weld. Make sure you use the correct weld rod/wire for reboring with carbide cutting bits. 6011 rod is easier to machine than 7018 but wears faster. Consider 7014. For wire use 70S6 or substitute 70S2. It will help to first bore with a HSS cobalt steel cutter (instead of brittle carbide) to remove the high spots from hand welding. You should grind smooth any high spots from the welds first.
16 - Method B) Holes can be bored larger than spec size, and then a sleeve can be welded into the hole so that the I.D. is the original hole size (we recommend about 1/2" diameter larger for holes 2" to 4", 3/4" diameter larger for holes 4" to 6"). This method only works if the is a lot of extra room.
16 - Method C) An oversize bushing can be installed if there was a bushing before. Then when the holes become worn out again simply replace the old sleeve or bushing with a new one. They can be purchased from the manufacturer (such as Caterpillar) or are easily made on a metal working lathe. Heat treating the sleeve will make it last longer. Original Spec size is the original hole diameter specified by the manufacturer (such as Caterpillar) to fit the outer diameter of the pivot shaft, or if there is supposed to be a bushing, then spec size is the hole sized to press fit the outer diameter of the bushing that the shaft fits into. Check with the manufacturer for original specifications. Oversize bushings can be purchased from a heavy equipment dealer or sometimes an industrial bearing supplier such as one at the website www.ebushing.com. If your holes are not too worn and an oversize bushing is available, then you can just bore to fit the new larger outer diameter of the bushing. You can freeze some bushings overnight (or use nitrogen) and slip them into the holes in the morning for an easy press fit into a hole that is undersized by .001 or .002". Beware that the bushing I.D. does not collapse in so much that you need to bore or hone the I.D. to fit the pin.
17) Stop to measure often and adjust your cutter as specified above in paragraph 12. Use the digital caliper and manual caliper provided or optional dial indicator bore gage. The adjustable threaded measuring tools allow you to measure the bore without removing the boring bar. The easist way to get the the most exact finish is to hone the last .001". This also reduces the risk of accidently boring too much. You will likely need to sharpen or switch cutters.
18) When holes are finish sized, remove Magnetic drill and all bearings.
19) Cafefully use a torch and hand grinder to remove bearing standoff plates for future use or leave them on until you are absolutely sure you are done. The screws are designed for easy re-assembly back together in the exact same position if you tighten them down 90 percent of the way and tighten the last 10 percent of the way a 1/4 turn per screw until they are all tight.
20) If you are careful you should use about 2 carbide cutting bits per hole. Welded holes are hard on carbide bits and may use more.
21) Our standard equipment can bore up to 5.5" diameter but be aware that extending the cutting tool bit out far increases unwanted vibration (tool chatter). To bore holes larger than 5 inches, use the optional oversize adapter which allows hole boring up to 8 inches. The adapter slides on the boring bar and is designed to be screwed into one of the threaded holes that normally hold a set screw and then clamped on the boring shaft by tightening the clamping screw. The cutting bit can then be used inside the adapter to bore up to 8" diameter. The optional adapter comes with 8" diameter cones and longer bearing mounting plates to bridge over 8" holes.
NOTE: The carbide tips can be modified or sharpened with a green silicon grinding wheel or diamond grinding wheel mounted on a bench/pedestal grinder. Grinding the relief angle of the carbide further back can help reduce cutting tool chatter. The colbalt steel cutters can be sharpened on any grinding wheel. All the cutting bits shipped with the line boring equipment are full length stock size, so that each tool is capable of cutting to its maximum diameter. To bore holes smaller than 3.5" diameter, cut the shank of a cutting tool bit with a metal cutting saw. To bore very small holes, you may need to grind back some of the cutting tool head so that it can fit further down into the tool hole on the boring shaft. Our equipment uses standard 1/2" square lathe carbide cutting tools.
We provide a carbide facing cutter that faces a circular path about 5/8" wide and can be used to face multiple concentric paths. Also consider using a portable belt sander for surface facing.
Click to see a VIDEO of the Q150 Portable Line Boring Machine filmed by a customer

ALWAYS WEAR SAFETY GLASSES ! * ALWAYS KEEP HAIR, CLOTHING, HANDS AND FINGERS CLEAR !

Optional Precision Dial Indicator Bore Gage $89.

• Measues 2.0" - 6.0" with 11 anvils
• 0.0005" Graduation indicator.
• 6 inch probe depth
• For measuring hole diameters, tapers, and roundness.
• Self centering.
• Comes with AGD Group II dial indicator.
• Fitted case with anvils index.

Optional Threaded Measuring and Centering Tool Set: $95. per set - mounts inside the boring bar into the 1/2" square cutting tool ports. We include all the different lengths of threaded extensions with rounded ends you will need for holes 1.75" to 8". These tools are used to measure the bored hole without removing the boring bar. After gaging the hole you measure accross the threaded gauge rods with the digital caliper. These adjustable tools can also be used to position the boring bar inside the hole during setup. Accurate to about .001". (We recommend these)

Optional Boring Bar mounted Snap Gauge Set to measure holes: $489.

These mount inside the boring bar into the 1/2" square cutting tool ports. These tools are used to accurately measure the bored hole without removing the boring bar. Very accurate to within .001".

Optional Cutting Tool Positioner: $199.

Clamps to the cutting tool and very accurately adjusts the position. Works for adjusting the cutter height for holes 2.5" diameter and larger. Accurate to within .001" on the radius. Can be left on the cutter while boring holes larger than 3". Includes hex wrench for the set screw. (We recommend this)

Optional Cutting Tool Micro-Adjuster:
$292. (Dial type)
$442. (Digital type)

Clamps to the carbide carbide cutting tool shank and very accurately adjusts the position. Can be used on either end of the cutter. Works for setting the cutter for boring holes 2.5" diameter and larger. Extremely accurate to within less than .001".

Optional Universal Joint for Mis-alignment: $695.

Use to compensate for misalignment of the Boring Shaft and the Magnetic Drill Press. Comes with Adapter Shaft (not shown in photo) to connect the Universal Joint Coupling to your 3/4 inch Drill Press Chuck. This is not needed for most line boring jobs.

Custom made Tools for Cutting I.D. Retaining Ring Grooves: $395. each - this kit is custom made to order and comes with a spring, 2 set screw tool positioning collars and 2 cobalt steel cutters ground to match the width of your inside retaining ring groove. Only $295 if used with our Cutting Tool Positioner.

Milwaukee Magnetic Drill Press
Combination with 3/4 inch chuck to fit the shank of our line boring shaft:
$1595.00 if purchased with a line boring setup.
($1695.00 if purchased separately.)

Fein KBM-80Auto Magnetic Drill Press
with Automatic Feed and 3/4 inch chuck to fit the shank of our line boring shaft:
$3595.00 if purchased with a line boring setup.
($4195.00 if purchased separately.)

Fein Power Tools introduces the first fully automatic magnetic drill press with digitally controlled powerfeed.
• Approved by Fein Power Tool Company for use with the Q150 line boring adapter.
• Uses 120 Volts Electricity
• Has Manual and Automatic feed
• 3/4" chuck to fit our boring bars
• 11" total stroke length
• 5.7" stroke using auto-feed
• Automatic Lubrication for hole boring
• Swivel-lock Adjustable Positioning Base
• Mechanical three-speed gearbox, 110 to 580 rpm
• Electronic speed reduction/adjustment
• Touch pad controls
• Torque slip clutch
• Flexible bit insertion and highly accurate concentricity using a combination of QuickIN and MT 3 chuck
• High torque, high-performance motor for efficient core drilling up to 3 1/8" (80 mm) and tapping up to 1 1/8" (M27)
• Excellent job safety due to an extensive safety package with torque slip clutch, visual magnet holding power gauge, and Viseo Touch Pad controls
• Price includes: tool case, coolant tank, safety strap, chip hook, 3/4" chuck, QuickIN adapter for M 18 × 6 P 1.5, 2 centering pins, drift, touch guard
• Quality made in Germany
• Weight: 58 Lbs.