KJ212
Hydraulic tunnelling jumbo · ØΦ32-76mm/Φ42-89mm
Full Specifications
| Weight | Appr. 11000kg |
|---|---|
| Transport dimensions (L×W×H) | 11160*2000*1465/1985mm |
| Tramming speed on flat ground | 10km/h |
| Maximum climbing capacity | 25%( 14°) |
| Air compressor | DLGF 0.7/8-5.5(B) |
| Capacity of air compressor | 0.7m3/min |
| Pressure | 6-8bar |
| Air consumption of lubrication | 0.3m3/min |
| Oil Consumption of lubrication | 180-250g/h |
| Diesel engine | Cummins B3.9CS4-80C 59KW/2500rpm |
Specifications describe the standard configuration and are subject to change with the air package, tooling and options you select. Confirm the final datasheet with us before placing an order.
About the underground rock drills range
The KJ, KM, KS and KQ range covers the rock-drilling side of tunnelling and mining: hydraulic rigs for development and production holes, and machines for long-hole and specific in-stope work. The shared requirement across the range is that the rig has to fit the excavation it works in and hold hole direction over the depths the blast design specifies.
Where the KJ212 fits
KJ212 is one of the underground rock drills configurations we build, specified at hole diameter Ø32-76mm, weight Appr. 11000kg, working pressure 6-8bar. Hydraulic tunnelling jumbo · ØΦ32-76mm/Φ42-89mm.
Typical applications
- Tunnel and drift development — Face holes in road, rail and water tunnels and mine development headings.
- Long-hole production drilling — Ring and fan patterns in underground stopes.
- Rock reinforcement — Bolt and cable holes around headings and chambers.
- Surface mining and quarrying — Production and pre-split holes where a compact rig is preferred.
How it works
Hydraulic rock drills deliver impact energy hydraulically rather than pneumatically, which is why they penetrate faster and use less energy per metre than an air driller of comparable size. The rig around the drill — boom, feed, carrier — determines where that energy can be applied and how quickly the rig can be repositioned.
- Impact power, rotation and feed are matched to the drill steel; mismatching them wears out steel and bit together.
- Bore hole diameter range in the table is set by the drill steel and bit series, not by the engine.
- Applicable drill pipe specification tells you which steel the rig can handle at full torque.
How to specify the right configuration
Define the hole pattern first — diameter, depth, direction and the number of holes per round. Then choose the rig that can drill that pattern with the fewest set-ups and the steel you already stock.
- Check the bore hole diameter range against the largest and smallest hole in the pattern.
- Confirm the applicable drill pipe specification so you are not forced into a proprietary steel.
- Match the rig width and height to the smallest drift on the tramming route.
- Ask about the recommended impactor and bit series for the rock you actually have.
Frequently Asked Questions
How do I choose between the KJ, KM, KS and KQ families?
The families differ mainly in carrier size, boom configuration and the hole range they cover. Send us the drift section and the hole pattern and we will narrow it to one or two models rather than listing all of them.
Can the rig use third-party drill steel?
Yes, as long as the steel matches the shank and thread the drill accepts. The applicable drill pipe specification is listed per model.
Are these rigs available with electric drive?
Electric drive is available for underground work where ventilation capacity is limited. Confirm at enquiry because it changes the carrier specification.
What is the price of the KJ212?
Price depends on configuration — the air package, the tooling included, and the shipping terms. Send us the hole diameter, depth and ground conditions and we will quote against your job rather than a list price.
Tell Us About Your Site
Send us your geology, hole diameter and target depth.