RB120 – ROOF BOLTER
This particular model is Caterpillar's smallest and most compact roof bolter. It can be productive in the smallest spaces and in seam heights as low as 32 inches (81 cm). It has a single arm design with automatic temporary roof support and overhead canopies for the operator when tramming and bolting. While tramming, the operator can choose from two speed settings, and power is applied at each wheel to help it maintain traction in soft ground. Both simple and efficient, the RB120 is designed to get in and out of an entry quickly so production can resume.
SPECIFICATIONS
Operating Height813.0 mm
BoomSingle
FrameFixed
specifications
Operating Height813.0 mm
BoomSingle
FrameFixed
cable reel
TypeUnit is supplied with 7.6 m (25 ft) of recommended cable.
Type457 mm (18 in) diameter for #4/3C Round Cable – 83.8 mm (275 ft) capacity reel for #4/3C, GGC round trailing cable.
manuals
TypesTwo parts manuals.
dust system blowers
TypeGuyan 3300 series blower rated 56 CFM at 12 in Hg, variable.
accessories
TypesExtra Parts Manual.
hydraulics
ATRS Support CylinderOne (1) 89 mm (3.5 in) bore, double acting cylinder with pilot operated check valve.
Boom Feed CylinderOne (1) 127 mm (5 in) bore, double acting cylinder with in line check valve.
Hydraulic HoseMain system hoses are two wire braid rated at 621 bar (9,000 psi) burst pressure; MSHA 2G flame resistant approved; fittings JIC
PumpTwo stage gear pump rated at 94.6/56.8 L/min (25/15 gal/min) at 1,770 rpm with spline fit to pump motor.
Reservoir446.7 L (118 gal) capacity reservoir with 7 micron return filtration, filter by-pass and “in tank” strainer.
Stab Foot CylinderOne (1) 76.2 mm (3 in) bore, double acting cylinder.
Valve Banks and Auxiliary ControlsAll valve banks are spring returned, bi-directional with main relief set at 138 bar (2,000 psi).
Valve Banks and Auxiliary ControlsAll other pressures are set for each function accordingly.
Valve Banks and Auxiliary ControlsOne (1) main valve bank
Valve Banks and Auxiliary ControlsThree (3) auxiliary controls
Valve Banks and Auxiliary ControlsTwo (2) auxiliary cable type controls
Valve Banks and Auxiliary ControlsOne (1) cable reel control operated by means of valve handle located in the operator’s tram station.
frame
TypeLow profile rigid frame. The frame design is a box structure type for a light weight, high strength frame assembly.
midmachine area between tires
ComponentsATRS support function control.
ComponentsStab foot function control.
ComponentsInch tram function controls.
dimensions approximate
ATRS reach – with 26×7-12 tires1930.0 mm
Bolt tightening torque (adjustable)271.0 N·m
Chassis height – with 26×7-12 tires660.0 mm
Chassis overall width1880.0 mm
Drill boom feed1270.0 mm
Drilling feed thrust (maximum)3175.0 kg
Drilling torque (variable)380.0 N·m
Ground clearance – with 26×7-12 tires150.0 mm
Minimum tramming height – with 26×7-12 tires813.0 mm
Overall length with ATRS4521.0 mm
Tram speed – fast0-39.6 m/min (0-130 ft/min)
Tram speed – slow0-18.3 m/min (0-60 ft/min)
Wheelbase1067.0 mm
drive train
TypeFour wheel planetary drive; each drive consists of a Fairfield W1B torque hub along with Char-Lynn series 2000 hydraulic motor.
voltage
Type440 Volt AC Electrical System – pump motor rated at 29.8 kW (40 hp) for one hour at 1,770 rpm.
TypeSplined insert for direct mounted pump and 440 volt AC heater strip.
TypeMSHA totally enclosed explosion proof; non-ventilated cooling; foot mounted.
blower drive
TypeBelt driven; vacuum blower is directly driven from a hydraulic motor by means of sheaves and “v” belts.
tirewheels
TypeFour 26×7-12 Solid Rubber Tires – 26 in maximum form diameter, tires mounted on formed rim assemblies.
lighting system
TypeOcenco Incandescent Lighting – with one headlight on front and rear.
drill station canopy
TypeDrill Station Canopy – Attached to A.T.R.S. support arm for operator coverage at drilling controls.
miscellaneous
KitsSeven (7) oil sampling kits.
fire suppression
TypeFour point, 9.1 kg (20 lb) tank, multi-purpose, ABC dry chemical fire suppression system; manually actuated.
dust box
TypeDonaldson style dust collector box with internal separator, cyclone and filter.
automatic parking brake
TypeTwo spring applied, hydraulic released, fail safe brakes at front of machine.
operator’s drill station area
ComponentsDrill boom feed function control.
ComponentsDrill rotation function control.
ComponentsTool supply area on boom for drill steel, drill bits, bolts, resin, etc.
tram station area
ComponentsCable reel function control.
ComponentsFull tram function controls.
ComponentsManually adjustable tram canopy.
ComponentsTwo pressure gauges.
atrs htype
Type1930 mm (6 ft 4 in) reach H-type Design; one primary ATRS cylinder is required for this reach.
electrical
StartTwo (2) push buttons located at tram and drill station.
StopThree (3) tape switch (panic strip) that de-energizes electrical system and applies automatic brake.
controller
TypeSize 3 electro-mechanical starter with heater strips, 1.5 kVA transformer and 100 amp circuit breaker.