Product Overview
The TGEC excavator short reach boom is a direct replacement for standard boom-and-arm setups, featuring a compact design tailored for tunneling, underground construction, and other low-clearance jobs where a conventional boom simply won't fit. By shortening both the boom and arm, this configuration reduces the maximum operating height while providing useful digging depth for tunnel mucking, utility work, and interior demolition. As part of the broader TGEC excavator boom and arm assemblies range, this configuration is intended for contractors working in tunnels, basements, under bridge overpasses, and other height-restricted areas. If you're weighing boom options or considering reach trade-offs, our excavator boom types guide and long boom vs long-reach comparison offer useful insights.
Available Configurations & Models
Three models are available for excavators from 20 to 45 tons. All dimensions shown are for reference and may shift slightly depending on the final configuration and the specific carrier machine.
| Parameter | TG-SB20 | TG-SB30 | TG-SB40 |
|---|---|---|---|
| Excavator Class | 20–25 t (22–27.5 ton) | 30–36 t (33–39.6 ton) | 40–45 t (44–49.5 ton) |
| Total Length | 13000 mm (42.7 ft) | 15400 mm (50.5 ft) | 18000 mm (59.1 ft) |
| Boom Length | 3200 mm (10.5 ft) | 4200 mm (13.8 ft) | 4500 mm (14.8 ft) |
| Arm Length | 1900 mm (6.2 ft) | 1900 mm (6.2 ft) | 1900 mm (6.2 ft) |
| Max Operating Height | 4500 mm (14.8 ft) | 5000 mm (16.4 ft) | 5000 mm (16.4 ft) |
| Max Digging Depth | 8500 mm (27.9 ft) | 10500 mm (34.4 ft) | 11000 mm (36.1 ft) |
The specs above are offered as a general guideline. Actual figures depend on the final build. For precise numbers, check with the TianGe technical team.
Series-Wide Technical Highlights
Compact boom and arm geometry pulls the maximum operating height down to as low as 4500 mm — ideal for tunnels and low-clearance work.
Digging depths range from 8500 to 11000 mm across the series, providing substantial excavation depth within the reduced working envelope.
Built from high-strength steel with reinforced pivot points for demanding underground and confined-space applications.
Mounting brackets are custom-engineered for the specified excavator make and model, with pin spacing and pin diameters verified against the machine dimensions.
The complete package includes the boom, arm, and all necessary pins and bushings — ready to bolt on and go.
Excavator Compatibility Guidance
TGEC short reach booms are offered in three sizes spanning the 20-to-45-ton excavator range. The TG-SB20 is designed for 20-to-25-ton machines, the TG-SB30 is designed for 30-to-36-ton units, and the TG-SB40 is designed for 40-to-45-ton excavators. Every assembly is built to order for a specific excavator make and model, with mounting brackets checked against the machine's pin dimensions. The assembly is designed to work with the excavator's existing boom, arm, and bucket hydraulic functions; auxiliary hydraulics are not normally required for the boom assembly itself. When you place an order, just give us the excavator make and model, operating weight, pin-to-pin spacing, pin diameter, and stick width, and our engineering crew will take it from there.
Typical Applications
Tunneling and underground work: Muck out and excavate in tunnels, shafts, and other subterranean spaces where overhead clearance is at a premium.
Tight quarters: Operate in basements, under bridges, inside buildings, and any other low-headroom environment where a standard boom is a non-starter.
Indoor wrecking: Take down interior walls, slabs, and structural elements inside buildings with limited ceiling height.
Utility trenching: Dig utility lines and trenches in areas with overhead wires, pipes, or other obstructions.
Underground mining: Work in narrow seams, drifts, and confined stopes where a full-size boom can't maneuver.
Working Principle
This short reach boom uses the excavator's standard hydraulic circuits — the boom cylinder handles lift and lower, while the arm cylinder controls the in-and-out motion of the arm. The shortened boom and arm geometry is what drops the maximum operating height, making it suitable for work in low-clearance environments. The arm length stays consistent at 1900 mm across all models, giving you useful digging depth while keeping the overall package compact. The bucket curl function works just as it always does, so you can keep using standard buckets, thumbs, and other attachments that fit your base machine. Unlike a long-reach boom that stretches the working envelope outward, this configuration compresses it vertically to fit tight spaces.
Dealer & Bulk Orders
TGEC supplies short reach booms directly to equipment dealers, tunneling specialists, underground contractors, and demolition firms through factory-direct and bulk-supply channels. These programs come with volume-based pricing, dedicated account management, and flexible production scheduling. Need custom engineering for a specific excavator brand popular in your region? We can do that. OEM and white-label options are also available with custom paint, logos, and packaging. Reach out to the TGEC dealer sales team with your company info, target excavator models, and estimated annual volume to open a wholesale account.
Request a Quote — Excavator Short Reach Boom
Just share your excavator make and model, operating weight, pin-to-pin spacing, pin diameter, stick width, preferred model (TG-SB20 through TG-SB40), primary job type (tunnel / confined space / indoor demolition / utility), and quantity. Our team will confirm the right configuration, double-check mounting fit, and get back to you with a factory-direct quote, lead time, and shipping details.
Dealers and OEMs: get in touch with TGEC to talk volume supply, custom builds, private-label options, and long-term sourcing arrangements.
