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471SERIES DIG-R-TACH |
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MODEL |
471 Series 12 |
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471 Series 20 |
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Hydraulic Parameters |
Auxiliary hydraulic system of carrier vehicle (compact tractor loader backhoe, mini-excavator, compact skid loader, etc.) serves as power source. Low-speed. high-torque hydraulic motor transfers torque to separate auger driveshaft though direct-drive connection. Forward and reverse auger direction controlled by auxiliary hydraulic valve control device (4-way, three-position, spring return to neural, cylinder-type spool required).
Auxiliary hydraulic system flow rate in GPM or lit/min determines auger rotational speed in RPM. Auxiliary hydraulic system pressure relief valve setting in PSI or kg/cm2 determines actual digging torque in ft. lbs., or N.m. Improper flow rates and/or pressure relief values may cause component damage and not produce satisfactory digging performance for specific auger diameter and/or soil classification. |
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System Configuration |
5 to 10 GPM (19-38 lit/min) flow range. 8 GPM (30 lit/min) optimum flow rate. 1500-3000 PSI (105-210 kg.cm2) hydraulic system pressure relief valve setting range |
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7 to 12 GPM (27-46 lit/min) flow range. 11 GPM (42 lit/min) optimum flow rate. 1500-3000 PSI (105-210 kg/cm2) hydraulic system pressure relief valve setting range. |
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Hydraulic System Requirements |
281 ft. lbs. (381 N.m.) @ 2000 PSI (140 kg/cm2)
356 ft. lbs. (482 N.m.) @ 2500 PSI (175 kg/cm2)
426 ft. lbs. (578 N.m.) @ 3000 PSI (210 kg/cm2) |
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456 ft. lbs. (616 N.m.) @ 2000 PSI (140 kg/cm2)
574 ft. lbs. (775 N.m.) @ 2500 PSI (175 kg/cm2)
731 ft. lbs. (987 N.m.) @ 3000 PSI (210 kg/cm2) |
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Maximum Drilling Torque |
89 RPM @ 5 GPM (19 lit/min)
144 RPM @ 8 GPM (30 lit/min)
180 RPM @ 10 GPM (38 lit/min) |
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73 RPM @ 7 GPM (26 lit/min)
104 RPM @ 10 GPM (38 lit/min)
125 RPM @ 12 GPM (45 lit/min) |
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Auger |
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Design |
Auger construction features Pengo® type, cast-steel boring heads, forged-steel teeth and cast-steel screw bits for maximum digging performance and versatility in a wide cross section of soil compositions. Think, cross-sectioned helicoid or sectional type auger fighting delivers strength and wear resistance. Fighting pitch is set to produce cleaner, more useable holes in sandy or granular-type soils. All boring-head wear parts are field replaceable. |
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Diameters |
4" (102 mm) to 24" (610 mm) |
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Lead Auger and Auger Extension Length |
A full line of lead augers and continuous-flighted auger extensions designed to extend the digging depth are available in standard 36" (914 mm) effective lengths. A mounted 417 DIG-R-TACH® auger/extension and excavated soil can result in substantial weight. Refer to carrier vehicle life height and operational center of gravity envelope information to determine maximum allowable auger length and/or attachment weight combinations. Improper auger length and/or attachment weight combinations can result in property damage and.or personal injury. |
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Frame |
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Structure |
Unitized, welded-steel plate and tube with directional-limit stops |
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Bearing |
High-capacity, seal-ball type |
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Plumb Line Mechanism |
Double-jointed, universal-joint swivel with full-length sleeved pins |
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Driveshaft Connection To Auger |
1 3/8" (35 mm) hexagon |
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General |
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weight, Less Mounting Frame and Hose Kit |
50 lbs. 923 kg) |
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52 lbs.(24 kg0 |
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The 471 DIG-R-TACH system is an economical yet rugged earth auger system. The highly effective hydraulic motor features a wheel mount type configuration of greater load capacity than standard motors. The supplemental bearings are designed to absorb damaging thrust and side loads. To be used with skid loaders eqiupped with protective barriers to prevent augur contact with operator during normal operation. Not designed for dipperstick bucket of compact tractor backhoe.
