Designed and manufactured in Chicago
Line Boring Bars
Sold individually or as part of a set. Made from induction hardened, chrome plated precision ground and polished steel, with square tool ports broached every 2.5” or 3”.
- 0.875” to 1.75” diameter
- 21” to 100” long
- Sold individually or in a set
Features
Built to measure without pulling the shaft
Made from induction hardened, chrome plated precision ground and polished steel; our bars are included in our Line Boring Sets and have square tool ports broached every 2.5” or 3” so that you can measure without pulling the shaft out. Use a Starrett 823 inside micrometer.
See our bars at work on our YouTube channel.
- Induction hardenedHardened steel bars for repair work.
- Chrome platedPrecision ground and polished.
- Broached tool portsSquare ports every 2.5” or 3” along the bar.
- Measure in placeCheck the bore with a Starrett 823 inside micrometer, bar still in.
Sizes
Line boring bar sizes
17 bar sizes from 0.875” to 1.75” in diameter. Line boring sets use the 1.5” and 1.75” bars in 40”, 48” and 72” lengths.
| Bar Diameter | Length | Sq Hole | Sq Broached Tool Ports | Shank Diameter | Distance b/w Holes |
|---|---|---|---|---|---|
| 0.875" | 36" | 0.25" | 11 | 0.5" | 3" |
| 1.00" | 36" | 0.312" | 11 | 0.75" | 3" |
| 1.25" | 42" | 0.312" | 11 | 0.75" | 3" |
| 40" | 0.375" | 13 | 0.5" | 2.5" | |
| 48" | 0.375" | 14 | 0.75" | 3" | |
| 1.5" | 21" | 0.5" | 5 | 0.75" | 2.5" |
| 40" | 0.5" | 13 | 0.75" | 2.5" | |
| 48" | 0.5" | 14 | 0.75" | 3" | |
| 54" | 0.5" | 19 | 0.75" | 2.5" | |
| 72" | 0.5" | 25 | 0.75" | 2.5" | |
| 73" | 0.5" | 21 | 0.75" | 3" | |
| 1.75" | 22" | 0.5" | 5 | 0.75" | 2.5" |
| 40" | 0.5" | 13 | 0.75" | 2.5" | |
| 48" | 0.5" | 14 | 0.75" | 3" | |
| 72" | 0.5" | 25 | 0.75" | 2.5" | |
| 73" | 0.5" | 21 | 0.75" | 3" | |
| 100" | 0.5" | 21 | 0.75" | 3" |
Need a different combination? Any combination of boring bars and hardware. Call to customize a set.
Call (224) 435-6999Tooling
Tooling for your boring bar
Optional products available for purchase either as add-ons to any order or individually. These items are designed to enhance your setup and provide the tools you need for specific tasks.
Tool Positioner
Shows tool position in 0.001" increments (radius), 0.002" (diameter); for precise cutting setup. Minimum bore diameter: 2.5”
Modified Dial Caliper
Dial caliper with extended inside jaws to measure the bore while the bar is in place
Inner Grooving and Bore Measuring Tool
Spring-loaded insert for cutting snap ring grooves; can be swapped with a gauge to measure bores. Measuring tolerance: 0.002”
Cones
UHMW-PE plastic cones with a metal sleeve for centering the boring bar in the bore
BoreRight Tool Adjuster
Moves the tool bit with a jacking screw and shows it on a dial, for setting the cutter on the final cut. Works on any line boring bar. See BoreRight
Carbide Cutters
Carbide-tipped tool bits for cutting and boring operations
Line Boring Power Feed
Automatic, consistent feed for the bar, on a standard handheld drill. See the line boring power feed
Line Boring Sets
Or get the bar as part of a complete set
Each set includes everything needed for accurate in-line machining and repair: the boring bar, plate or channel, bearings, mounting brackets, centering cones, a clamping collet and hardware.
FAQ
Common questions
Do you sell boring bars on their own?
Yes. Our line boring bars are sold individually or as part of a line boring set. Tell us the diameter and length you need, or call (224) 435-6999.
What sizes do your line boring bars come in?
Diameters of 0.875”, 1.00”, 1.25”, 1.5” and 1.75”, in lengths from 21” to 100”. See the full size table for tool ports, shank diameter and hole spacing.
How do I measure the bore without pulling the bar out?
The square tool ports are broached every 2.5” or 3”, so you can measure through them with a Starrett 823 inside micrometer while the bar stays in place. The modified dial caliper also measures the bore with the bar in place.
Which bars come in a line boring set?
Set A has one 1.5” or 1.75” bar, 40” or 48” long. Set B adds a 72” bar of the same diameter. See the sets and prices.
Can I get a different combination of bars?
Yes. We can put together any combination of boring bars and hardware. Call (224) 435-6999 or request a quote below.
Get a price on boring bars
Sold individually or in a set. Tell us the diameter, length and job, and Anguel will get back to you with a quote.
Request a quote for line boring bars
We’re ready to start as soon as you are. Fill out the form below, and a representative will be in touch shortly to kick off your next line boring project.
- Prefer to talk? (224) 435-6999
- Helpful to include Bar diameter and length, how many, and what you're repairing.
- Built in Chicago Designed and manufactured by IRM. Bars from 0.875” to 1.75”.