Boring bar running through a large bore with metal chips collected in the opening
Portable line boring
Mactech BB Portable Line Boring Bars
BB1750, BB2252, BB4000, BB6000 and BB8000 boring bars for bores from 1-3/8 in to 96 in
Mactech BB portable line boring bars repair bores on site, from small bores in confined spaces to bores up to 96 in with extension kits. Five bar sizes from 1.75 in to 8 in come with electric, hydraulic or air drive options.
Manufactured byMactech
1.75–8 inBar diameter across five models
Up to 96 inBore ID with BB8000 extension kit
2 inMinimum bore ID of BB1750
Up to 288 inStandard bar length (BB6000)
Overview
Five bar sizes for on-site bore repair
The BB range brings line boring to the job site, so worn bores can be repaired without sending equipment to a shop. Bar lengths can be customized for every model, and standard lengths run from 48 in to 288 in depending on the bar.
The BB1750 uses a 1.75 in chrome-plated bar for bores from 2 in to 10 in and is a lightweight system for quick jobs in confined spaces. Its feed is bi-directional and variable, up to 0.020 in per revolution. The BB2252 uses a 2.25 in bar for bores from 2.5 in to 16 in, extended to 24 in with the 12 to 24 in kit or down to 1-3/8 in with the 1-1/4 in bar adapter. It has a 4:1 worm drive and an adjustable mechanical feed.
For larger work, the BB4000 (4 in bar, 25:1 drivehead) bores 10 in to 40.9 in, or up to 48.9 in with the extension kit. The BB6000 (6 in bar, 45:1 drivehead) bores 12 in to 48 in, or up to 72 in with its kit. The BB8000 (8 in bar, 30:1 drivehead) bores 12 in to 60 in, or up to 96 in with its kit, and accepts an optional facing arm.
Drive options depend on the model: electric or hydraulic on the BB1750, BB4000 and BB6000, and electric, hydraulic or air on the BB2252. The smaller bars can be paired with a bore welder so that boring and welding are done from one setup.
Applications
Where BB boring bars work
The bars repair worn or damaged bores on equipment that cannot easily be moved.
Two aluminium BB2252 drive and feed units on a chrome boring bar mounted on a red test fixture
Close-up of a Mactech feed unit with handwheel on a chrome boring bar
Technician inspecting a BB2252 drive unit and bar during setup in a workshop
Heavy equipment pin bores
Line boring worn pin bores on booms and linkages in the field.
Bore and weld repairs
Boring and welding from one setup with the smaller bars and a bore welder.
Confined spaces
The lightweight BB1750 and narrow BB2252 fit tight work areas.
Large bores
BB4000 to BB8000 with extension kits handle bores up to 96 in.
Features
BB range features
- Five bar diameters: 1.75, 2.25, 4, 6 and 8 in
- Standard and custom bar lengths for each model
- Extension kits for larger bores on the BB2252, BB4000, BB6000 and BB8000
- 1-1/4 in bar adapter takes the BB2252 down to 1-3/8 in bores
- Electric, hydraulic or air drive options depending on the model
- Adjustable swivel bearing mounts and straightened, verified bars on the BB2252
- Optional feed screw bars, tapered boring and facing arm accessories for the BB2252; facing arm for the BB8000
- Electric feed box available for the BB4000, BB6000 and BB8000
Benefits
What it brings to the job
Bores are repaired in place, avoiding shop repairs and downtime
One family covers small bores to bores up to 96 in
Bar length and drive can be matched to the job
Boring and welding from one setup on the smaller bars
Repairing a worn bore on site?
Share the bore diameters, lengths and access conditions, and our Machinery team will help you select the right Mactech BB boring bar.
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