National Crane’s NBT50 series is the manufacturer’s highest-capacity truck-mounted crane line, offered in 50- and 55-U.S.-ton configurations for construction, infrastructure and industrial lifting. The series pairs full-power telescopic booms with integrated mechanical controls, load moment indication and outrigger beam position sensing. The design is intended to support efficient lifting while simplifying jobsite deployment.
National Crane describes the NBT50 as a significant technical product in the heavy-duty truck-mounted crane segment. With load ratings of 50 USt and 55 USt, the line is aimed at construction, infrastructure and industrial lifting applications that require high reliability.
The series combines an integrated mechanical control system with outrigger sensing technology. National Crane lists integrated controls and outrigger sensing among the line’s principal features, with an emphasis on practical lifting performance and setup efficiency.
The NBT50 family is available with a standard 102-foot (31.1-meter) four-section full-power telescopic boom or an optional 128-foot (39.0-meter) five-section full-power boom. Integrated mechanical controls and a load moment indicator manage lifting operations, while an outrigger beam position sensing system supports load chart selection.
| Parameter | Specification |
|---|---|
| Maximum load versions | 50 USt / 55 USt |
| Standard main boom | 102 ft (31.1 m), four-section full-power telescopic boom |
| Optional main boom | 128 ft (39.0 m), five-section full-power telescopic boom |
| Control system | Integrated mechanical controls and LMI |
| Outrigger technology | Outrigger beam position sensing system |
National Crane says the NBT50 series brings together electronic control, outrigger awareness and operator comfort in a single package. The manufacturer emphasizes precision, jobsite safety and reduced setup complexity as central design goals.
The NBT50 series features a fully integrated mechanical control system and load moment indicator. The manufacturer says the combination improves operating precision, while the Work Area Definition System helps define safe working areas in complex construction environments.
A new outrigger beam position sensing system is designed to help operators select the correct load chart. The outrigger layout is also optimized to eliminate the need for additional outrigger support, or SFO, under standard operating conditions, simplifying on-site deployment. The boom uses self-lubricating Easy Glide wear pads, which the manufacturer says reduce routine maintenance complexity.
To support extended work periods, the NBT50 offers a deluxe operator cab with air conditioning, a diesel heater with defrost, and a skylight. A single-axis electronic controller is intended to provide more ergonomic control.
