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Overview

"The RB220 is a low profile roof bolter with tramming heights as low as 33 inches. Unlike the RB120 chassis, the RB220 is longer and articulates a total of 80 degrees at the center. This provides the machine with a turning radius of 21 ft 6 inches (655 cm). In addition to articulating left or right, the machine can oscillate up and down at the center bearing allowing it to pivot a total of 8 degrees. This enables the machine to change the angles of approach both at the front and rear of the machine. By doing this, the machine can tram up and down slopes and over undulations that would otherwise ground the machine. To help keep the machine moving in soft ground, power is applied at all four wheels.The RB220 has dual drilling booms that can follow a four bolt pattern without having to move the chassis. Both operators are protected by canopies at the drills stations and an automatic temporary roof support system."

Specifications

Units:
Operating Height 32.0 in 813.0 mm Less
Boom Dual Dual Less
Frame Articulated Articulated Less

Dimensions (approximate)

ATRS reach – with 28x12-15 tires 8.0 ft 2438.0 mm Less
ATRS reach – with 32x12.5-15 tires 8.0 ft 2438.0 mm Less
ATRS reach – with 35x15-15 tires 8.0 ft 2438.0 mm Less
Bolt tightening torque (adjustable) 190.0 ft-lb 258.0 N·m Less
Chassis height – with 28x12-15 tires 2.25 ft 686.0 mm Less
Chassis height – with 32x12.5-15 tires 2.42 ft 737.0 mm Less
Chassis height – with 35x15-15 tires 2.54 ft 775.0 mm Less
Chassis overall width 9.04 ft 2756.0 mm Less
Drill boom feed 4.33 ft 1321.0 mm Less
Drilling feed thrust (maximum) 10000.0 lb 4536.0 kg Less
Drilling torque (variable) 310.0 ft-lb 420.0 N·m Less
Ground clearance – with 28x12-15 tires 6.0 in 152.0 mm Less
Ground clearance – with 32x12.5-15 tires 8.0 in 203.0 mm Less
Ground clearance – with 35x15-15 tires 9.5 in 241.0 mm Less
Inside turn radius 9.5 ft 2896.0 mm Less
Maximum boom separation 16.17 ft 4928.0 mm Less
Minimum boom separation 3.5 ft 1067.0 mm Less
Minimum tramming height – with 28x12-15 tires 2.67 ft 813.0 mm Less
Minimum tramming height – with 32x12.5-15 tires 3.17 ft 965.0 mm Less
Minimum tramming height – with 35x15-15 tires 3.29 ft 1003.0 mm Less
Outside turn radius 21.5 ft 6553.0 mm Less
Overall length with ATRS 25.2 ft 7671.0 mm Less
Steering articulation 80° total 80° total Less
Tram speed – fast 0-40 m/min (0-130 ft/min) 0-40 m/min (0-130 ft/min) Less
Tram speed – slow 0-20 m/min (0-65 ft/min) 0-20 m/min (0-65 ft/min) Less
Wheelbase 6.58 ft 2007.0 mm Less

Drive Train

Type Four wheel planetary drive; each drive consists of a Fairfield W3B torque hub along with a Char-Lynn series 2000 hydraulic motor Four wheel planetary drive; each drive consists of a Fairfield W3B torque hub along with a Char-Lynn series 2000 hydraulic motor Less

Automatic Parking Brake

Type Two spring applied, hydraulic released, fail safe brakes at front of machine. Two spring applied, hydraulic released, fail safe brakes at front of machine. Less

Hydraulics

Boom Feed Cylinder Two (2) 6.5 in bore, double acting cylinder on each boom with in line check valve, one per drilling assembly. Two (2) 6.5 in bore, double acting cylinder on each boom with in line check valve, one per drilling assembly. Less
Boom Swing Cylinder Two (2) 3.5 in bore, double acting cylinders, one per drilling assembly. Two (2) 3.5 in bore, double acting cylinders, one per drilling assembly. Less
Hydraulic Hose All main systems hoses are two wire braid rated at 9,000 psi burst pressure; MSHA 2G flame resistant approved; all fittings JIC All main systems hoses are two wire braid rated at 9,000 psi burst pressure; MSHA 2G flame resistant approved; all fittings JIC Less
Pump Four stage gear pump rated at 35/35/15/15 gpm at 1,770 rpm with spline fit to pump motor. Four stage gear pump rated at 35/35/15/15 gpm at 1,770 rpm with spline fit to pump motor. Less
Reservoir 150 gal capacity reservoir with 7 micron return filtration, filter by-pass and “in tank” strainer. 150 gal capacity reservoir with 7 micron return filtration, filter by-pass and “in tank” strainer. Less
Stab Foot Cylinder Two (2) 4 in bore, double acting cylinders, one per drilling assembly. Two (2) 4 in bore, double acting cylinders, one per drilling assembly. Less
Steering Cylinder Two (2) 4 in bore, double acting cylinders. Two (2) 4 in bore, double acting cylinders. Less
Sumping Cylinder Four (4) 1.5 in bore, double acting cylinders two per drilling assembly. Four (4) 1.5 in bore, double acting cylinders two per drilling assembly. Less
Valve Banks One (1) ATRS and vertical articulation valve bank One (1) ATRS and vertical articulation valve bank Less
Valve Banks One (1) inch tram valve bank at rear of operator's side drilling assembly One (1) inch tram valve bank at rear of operator's side drilling assembly Less
Valve Banks One (1) steering valve bank controlled by means of a joy stick valve One (1) steering valve bank controlled by means of a joy stick valve Less
Valve Banks One (1) cable reel and vertical articulation valve bank One (1) cable reel and vertical articulation valve bank Less
Valve Banks All valve banks are spring returned, bi-directional with main relief set at 2,000 psi. All valve banks are spring returned, bi-directional with main relief set at 2,000 psi. Less
Valve Banks All other pressures are set for each function accordingly. All other pressures are set for each function accordingly. Less
Valve Banks Two (2) boom function valve banks, one per drilling assembly Two (2) boom function valve banks, one per drilling assembly Less
Valve Banks One (1) tram valve bank controlled by means of a joystick valve in operator's compartment One (1) tram valve bank controlled by means of a joystick valve in operator's compartment Less

Electrical

Start Push buttons at tram and drill stations. Push buttons at tram and drill stations. Less
Stop Tape switch (panic strip) at tram and drill stations that de-energize electrical system and applies automatic brake. Tape switch (panic strip) at tram and drill stations that de-energize electrical system and applies automatic brake. Less

Controller

Type Size 4 vacuum contactors, 1.5 KVA transformer and 150 amp circuit breaker. Size 4 vacuum contactors, 1.5 KVA transformer and 150 amp circuit breaker. Less

Frame

Type Low profile with bends utilized where applicable to reduce the number of indeterminate stresses introduced by welding. Low profile with bends utilized where applicable to reduce the number of indeterminate stresses introduced by welding. Less

Operator’s Drill Station Area

Components Hydraulically operated drill boom and stab foot functions Hydraulically operated drill boom and stab foot functions Less
Components ATRS function control and all other positioning function control ATRS function control and all other positioning function control Less
Components Vertical articulation function control Vertical articulation function control Less
Components Storage tool tray on each boom for drill steel, starter steel, drill bits and etc. Storage tool tray on each boom for drill steel, starter steel, drill bits and etc. Less
Components Inch tram function control (left hand drilling assembly only) Inch tram function control (left hand drilling assembly only) Less
Components 1 in thick, hydraulically adjustable drill station canopy on each drilling assembly 1 in thick, hydraulically adjustable drill station canopy on each drilling assembly Less

Tram Station Area

Components 1 in thick manually adjustable canopy 1 in thick manually adjustable canopy Less
Components Heavy duty seat Heavy duty seat Less
Components Full tram function control Full tram function control Less
Components Power fill function control Power fill function control Less
Components Vertical articulation function control Vertical articulation function control Less
Components Cable reel function control Cable reel function control Less
Components Four pressure gauges Four pressure gauges Less
Components Steering function control Steering function control Less

Reservoir Fill System

Type Power hydraulic fill, allows hydraulic oil to be added to reservoir without hand pumping. Power hydraulic fill, allows hydraulic oil to be added to reservoir without hand pumping. Less

Manuals

Types Two parts manuals Two parts manuals Less
Types One LinkOne CD which includes all above manuals in electronic format One LinkOne CD which includes all above manuals in electronic format Less
Types Two operation/maintenance manuals/troubleshooting guides Two operation/maintenance manuals/troubleshooting guides Less

Miscellaneous

Kits Seven (7) oil sampling kits Seven (7) oil sampling kits Less

RB220 Optional Equipment

Voltage/Blower Option
  • • 440 Volt AC, Roots Whispair Blower – electrical system with pump motor rated at 80 hp; blowers rated at flows to 81 CFM at 20" Hg. Each vacuum blower is directly belt driven from the electric motor by means of sheaves and “v” belts.

Lighting Option
  • • MCI Fluorescent Lighting, High – area lighting with one headlight on front and rear for high seam applications up to 10 ft.

Cable Reel Option
  • • 19 in diameter for #2/3C Round Cable – 210 ft capacity horizontal type reel for recommended #2/3C, GGC round trailing cable. Unit is supplied with 20 ft of recommended cable.

Tram Canopy Option
  • • Tram Canopy, 2 ft 8 in minimum height – manually adjustable tram canopy with a minimum height of 2 ft 10 in and a maximum height of 3 ft 10 in at 8.5 in ground clearance.

Drill Chuck Option
  • • Dry/Deep Splined Chuck – chuck protrudes above drill head by 1/8 in with no need for drill chuck retention.

ATRS Option
  • • 10 ft Reach, 10 Wide Crossbeam – T-Bar with 10 ft wide crossbeam including rockers arms one primary ATRS cylinder; one secondary cylinder.

Tire/Wheel Option
  • • Four 32x12.5-15, 32 in Foam Filled Tires – 20 ply, 32 in maximum form diameter foam filled tires mounted on rim assemblies.

Drill Speed Option
  • • 650 RPM Maximum Drill Speed – generated by means of a 1.25" gear width hydraulic motor.

Controller Cover/Oil Level Switch Option
  • • Oil Level Switch, Light & Low Oil Shutdown – above cover assembly with the addition of a low oil level switch that will electrically shut machine down before oil is dangerously low.

Oil Filter Brand Option
  • • Schroeder “Spin-On” Oil Filter – 7 micron return side filter. The filter is equipped with by-pass and external dirty filter indication.

Blower Exhaust Location Option
  • • Left Side, Operator’s Side – at rear of machine.

Roof Bolter Accessories
  • • Pre-Duster Installation – remote tank with a 0.4 cu. ft. capacity that removes larger dust particles automatically, when stab cylinder is activated.
  • • Grease Zone Lubrication Installation
  • • Torque Gauge Installation – monitor the amount of torque being applied to the roof bolts during installation (one gauge for each drilling assembly).

A Commitment to the Mining Industry

As the demand for commodities grows, mining companies need a partner to support them in their efforts. Caterpillar is committed to being that partner.

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