Line Boring
Precision Bore Restoration for Heavy Equipment & Agricultural Machinery
Line boring is the process of re-machining worn, damaged, or misaligned bores back to original specifications. When pin bosses, pivot points, and bore housings wear out of round or out of alignment, the result is slop, clunking, accelerated bushing wear, and eventual structural failure. We restore those bores — precisely.
Perigo offers in-shop line boring for agricultural and construction equipment. From excavator arms and loader pin bosses to tractor three-point hitches and implement pivot points — if a bore is worn, we can restore it for a fraction of the cost of component replacement.
Is Your Equipment Due for Line Boring?
Worn bores don't get better on their own. Catching them early means a straightforward bore job — waiting means weld build-up, sleeve installation, or scrapping the component entirely. Watch for these signs:
- Excessive play or slop in pins and bushings
- Clunking or banging during operation at pivot points
- Pins that are difficult to remove or won't stay in
- Visible oval or egg-shaped wear in the bore
- Accelerated bushing wear — replacing bushings repeatedly
- Visible cracks or deformation around the bore housing
Common Line Boring Applications
Excavators, loaders, dozers, tractors, and ag implements — if it pivots, it wears. We restore it.
Excavator Arms & Sticks
Restore worn pivot bores on excavator boom-to-stick and stick-to-bucket connections.
Loader Pin Bosses
Re-machine loader lift arm and bucket pin bores on tractors and wheel loaders.
Dozer Undercarriage
Repair final drive housings, pivot shaft bores, and chassis pivot points.
Backhoe Dipper Arms
Restore alignment in backhoe swing towers, dipper arms, and bucket linkage bores.
Hydraulic Cylinder Mounts
Re-align and resize hydraulic cylinder pin bores and cross-tube connections.
Agricultural Equipment
Three-point hitch bores, baler pivot points, header lift arms, and implement connections.
Restore It. Don't Replace It.
Line boring is one of the most cost-effective repairs in heavy equipment maintenance — when it's done right.
Factory-Spec Alignment
We re-machine bores back to original specifications — restoring proper pin fit, alignment, and load distribution.
Avoid Costly Replacement
A new boom or arm can cost tens of thousands. Line boring restores the component for a fraction of the cost.
Welding & Build-Up Available
When bores are severely worn, we weld and build up the bore before re-machining — restoring material and geometry.
Extends Equipment Life
Properly aligned bores reduce wear on pins, bushings, and mating surfaces — extending the life of your entire drivetrain.
In-Shop Service
Bring your equipment or component to our shop. We have the setups to handle a wide range of bore sizes and configurations.
Precision Machining
Our boring equipment delivers tight tolerances, ensuring bores are round, straight, and correctly dimensioned every time.
The Line Boring Process
Component Inspection
We inspect the worn bore, measure existing dimensions, and assess the degree of wear and misalignment before developing a repair plan.
Weld Build-Up (if needed)
Severely worn or undersize bores are built up with weld material to restore the necessary metal for re-machining.
Line Boring Setup
The boring bar is set up through the bore centerline and precisely aligned to the component's axis before any cutting begins.
Precision Machining
The bore is cut to your specified final diameter — round, straight, and to the tolerance required for your pin and bushing fit.
Inspection & Sign-Off
Final dimensions are verified before the component is released. You get the size and finish your application requires.
Get Your Equipment Back to Spec
- In-shop line boring for ag & construction equipment
- Weld build-up available for severely worn bores
- Wide range of bore sizes accommodated
- Agricultural, construction & industrial equipment
- Precision machined to final dimension — not guesswork
- Call us with your bore size and we'll tell you what's needed