Hot sale 20-50 Ton Excavator 12-16m Two-section Telescopic Boom for Deep Digging Projections
Product Description
Q1: What is a two‑section telescopic arm?
A: Also known as a 2‑stage hydraulic sliding telescopic arm, it mainly consists of a fixed section, a sliding section and a telescopic hydraulic cylinder. Driven by the hydraulic cylinder, it can adjust working length and digging depth freely. It is widely used in deep‑pit excavation, river dredging, foundation construction and pond cleaning.
Q2: What materials are used for the two‑section telescopic arm?
A: The main boom tube uses Q690D / HG785 high‑strength wear‑resistant steel to keep high strength with reasonable weight. Other structural components such as connecting plates and ear bases are made of Q355B steel for good toughness and anti‑fatigue performance.
Q3: What are its main advantages?
A: ①Light‑weight & high‑strength: High‑grade steel reduces the overall weight and lowers the load on the excavator.
②Easy maintenance: External service openings allow cylinder and spare‑part replacement without disassembling the whole boom.
③Strong digging performance: Optimized front structure supports larger buckets and delivers greater digging force.
Q4: What kind of projects is it suitable for?
A: It is ideal for river & lake dredging, deep foundation & caisson excavation, underground pipeline works, slope treatment, land reclamation and deep‑digging in confined sites.
Q5: What is included in one complete set of two‑section telescopic arm?
A: It includes 1 set of two‑section telescopic arm, 1 pc of digging bucket, 1 pc of bucket cylinder, 1 set of link assembly, 9 pcs of pin shafts, 8 pcs of high‑pressure hoses, 1 pc of two‑way foot pedal switch.