Tamrock HE50F Microdrifter

DLT #: RD560132, RD12270




Flexible   Keeping your worksite running.
    Because of the light weight of the components, the combination of drill, feed and boom is suitable to be mounted. For example, on an excavation boom of light and middle weight tractors and excavators. Their mobility makes it possible to drill in the most difficult places.

Ergonomical     Operator comfort and better environment.
    Working conditions are vastly improved and comply with the strictest legislation. Noise is reduced by 10 to 15 dB compared to pneumatic drilling. The operator is no longer subjected to heat damaging vibrations. Dust collection eliminates the dancer of silicosis. In addiction, the harmful low frequency noise caused by the exhaust air as well as gases, the oil mist and draught (typical of pneumatic drills), have been eliminated in the Microdrifter HE50.

Efficient     Increased productivity.
    The faster percussion rate and higher efficiency of the hydraulic drill coupled with the constant feed rate of the boom increase productivity two to threefold compared to manual pneumatic drilling.

Economical     Energy cost reduction.
    The increased productivity and the high efficiency rate, the Tackrock hydraulic system cut the energy cost down to 1/3 per drilled meter. Tests have shown that drill steel costs are generally 20-40% lower, thanks to reverse rotation and optimized shock waves of hydraulic impact. Thanks to results of intensive R&D percussion power transmitted efficiently to break the rock instead of the drilling equipment.

Easy to Operate    Operation in tractor hydraulics.
    The drill is design to be easily maintained without special tools or servicing personnel. Your own personnel and tools will be enough. Tamrock's unique, patented system which is not subject to muck, dust, and corrosion will guarantee the trouble-free operation of the drill.

Specifications for HE50 Microdrifter
Shank	3/4", 7/8", 4-1/4" Hex (19mm, 22mm, 108mm)
Weight	59.5 lbs  (27 kg)
Height from Rod Center	2.125"  (54mm)
Opearting Pressure	1450 - 1750 psi  (100-120 bar)
Oil Flow Requirement	10 US gal/min  (40 liter/min)
Percussion Rate	3500 blows/min
Accumulator Charging Gas	Nitrogen Only
Accumulator Charging Pressure	435 psi (30 bar)
Rotation Speed (Reversible)	250 RPM)
Oil Filtration Requirement	25um abs...10um nom
Optimum Operation Viscosity	140-227 SSU  (30-60 cst)
Maximum Cold Start Viscosity	13,000 SSU  (2000 cst)
Air Flushing
Air Consumption	14-21 cfm  (400-600 liter/min)
Air Pressure	70-120 psi  (5-8 bar)
Water Flushing
Water Consumption	1.5 - 3 US gal/min  (6-12 liter/min)
Water Pressure	60-100 psi  (4-7 bar)
Shank Lubrication
Air Consumption	5-10 cfm  (150-300 liter/min)
Air Pressure	70-120 psi  (5-8 bar)
Lubrication Oil Consumption	1.75 - 4.5 oz/hour  (50-100 g/hour)
Tightening Torques
Tie Rods	37 lbft + 2X60°  (50NM + 2X60°)
Motor Cover Bolts	52 lbft  (70NM)
Connections
High Pressure Side (In)	Male 1/2" JIC  (R1/2 BSP 60°)
Low Pressure Side (Out)	Male 1/2" JIC  (R5/8 BSP 60°)
Flushing	Male 3/8" JIC  (R3/8 BSP 60°)
Shank Lubrication	Male 3/8" JIC  (R1/4 BSP 60°)
Recommended Hose Size
High Pressure Side (In)	1/2"
Low Presure Side (Out)	5/8"
Flushing	3/8"
Shank Lubrication	1/4"

Operation Principle


Figure 1.
    In Figure 1, the psiton is shown at its impact point.  Hydraulic oil enters the drill through channel (1).  At the impact point the hydraulic oil is acting on the pistons front side only (in space 2), causing the return movement to start.  The hydraulic oil has also access to the front section (3) of the distributor (4), whereupon the resulting pressure force pushes the distributor to the rear position.  During the return movement, part of the oil is stored in the high pressure accumulator (5).  The rear side of the piston is connected through port (6) to the return channel (7).


Figure 2.
    When the piston has travelled so far that the edge (8) has covered the return port (6), port (9) opens and the piston is stopped by the pressure force acting on its back side.  The pressure shock arising from the stoppage is absorbed in the accumulator (5).  After this the edge (10) opens the port (11) and the pressurized oil from the distributor's front side is discharged into the return channel (6).  Edge (12) has previously shut off the oil flow to the distributor's front side.  The piston again begins to move towards the impact point.


Figure 3.
    After the pressure has lowered on the distributor's front side the distributor begins to move towards it's front position, impelled by the pressure force acting on it's back end.  The distributor then closes the escape port (6) and the oil can flow to the rear of the piston via ports (9) and (13).


Figure 4.
    Driven by a force arising from a difference in the surface area the piston moves towards the drill rod.  The volume flow required to the piston's back side comes partially from the H.P accumulator (5).  A little before the impact point, the edge (12) allows the oil to flow to the front side of the distributor, which then moves to it's rear position.  At the same time, the distributor blocks the entrance of oil to the piston's back side.  After the impact point, the piston returns back, whereupon the operation as illustrated in figure 1 is repeated.

Changing to Water Flushing

    The 50-series rock drils are supplied without flushing pipe and are as such suited for Air Flushing.
    Air Flushing is connected to the drill with a male 3/8" JIC adapter as shown below.


    When Water Flushing is needed, the drill is fitted with the Water Flushing Kit no. 140 110 68.
    The kit includes the following parts:

Ref. No.	Description	Part No.	Quantity
1.	Flushing Pipe	142 120 98	1
2.	Poppet	090 609 68	1
3.	Adapter	086 243 58	1
4.	O-Ring	802 179 39	1
5.	Shank Seal	087 664 18	2
6.	Seal	086 411 28	1

Fitting to the Drill

• Remove plug (7) and push the flushing pipe (1) into the drill.
• Seal (6) will go into place better if it is moved onto the flushing pipe's thinned section before fitting.
• Fit O-Ring (4) onto stem (2) and then screw the stem into place.
• Remove plug (8) and screw the adapter (3) in the place of the plug.
• Shank lubrication air is connected to port (9).

Adapter (3) serparates the shank lubrication and the flushing in the way indicated by the illustration.


Pressures

• Maximum water pressure 7bar (100 psi)
• Pressure difference: The shank lubrication pressure must be 1bar (15 psi) higher than water pressure at all times.
• When water flushing is used, the shank lubrication pressure should be on at all times.

Feed-Mounted Drifter HE-50

• A separate shank lubricator is required; when air flushing is used the lubricator is connected to the flushing line.  When water flushing is used, the lubricator is connected to a separate shank lubrication line.  E.g. Wilkerson Economist
• Chain Feed KS-20 H
• TA 211
• Hand Lever in the Drill
• Can also be fitted with reverse rotation automatics Part no. 140 111 98