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HDD50
OPERATIONS MANUAL
Care & Maintenance Instructions
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Do not discard this manual.
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Keep manual readily available for reference during operation or when servicing product.
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Before operation and maintenance, read and comprehend operations manual content.
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Customer Service: 800.356.NUMA or 860.923.9551
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Email: numa@numahammers.com
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Website: www.numahammers.com
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Mailing Address: P.O. Box 348, Thompson, CT 06277 USA
Patents: 6,883,618 7,442,074 10,612,310 11,085,242 EP 3 803 032 B1 KR-101340351 EP-2029325
CN-101448608 BR-P10711711 AU2007254317 AU2007254317 WO2007/136658
© 2024 Numa Tool Company. All Rights Reserved.
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Related Manuals for Numa HDD50
Summary of Contents for Numa HDD50
- Page 1 Email: numa@numahammers.com • Website: www.numahammers.com • Mailing Address: P.O. Box 348, Thompson, CT 06277 USA Patents: 6,883,618 7,442,074 10,612,310 11,085,242 EP 3 803 032 B1 KR-101340351 EP-2029325 CN-101448608 BR-P10711711 AU2007254317 AU2007254317 WO2007/136658 © 2024 Numa Tool Company. All Rights Reserved.
- Page 2 BHA (Adapter, Sonde Housing, Bent Sub, Hammer and Bit) to be pre-torqued. □ Sonde housing toolbox and at least one extra bit. □ Lubricator equipped with inlet/outlet 2” Boss fittings & Numa recommended Bioblend 150 or equivalent. □ Drill Rig (in good working condition) plumbed for air properly including check valve.
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Page 3: Table Of Contents
Long Term ................13 Restarting ................. 14 Section VII Button Bit Maintenance ........15 General ..................15 Sharpening ................15 Section VIII HDD50 Recommended Spares ......16 Section IX HDD50 Makeup Torque .......... 17 HDD50 Acceptable Grip Areas ..........17 HDD50... - Page 4 If, during such warranty period, Buyer promptly notifies Numa in writing of any defect and establishes that the above warranty is not met, Numa shall either repair or replace the Product or credit the customer, as it deems necessary to meet the warranty.
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Page 5: Section I Description
11 for correct choke selection and pages 5 and 9 to facilitate the removal and the installation of the choke. The HDD50 hammer is a high performance tool which may require additional downfeed to maximize performance. Please contact your local Numa Representative for further details. -
Page 6: Functional Description
The feed tube supplies the main air into the chambers located in the piston. It is connected to the backhead by the pin. The feed tube is designed with a long bearing surface to maintain alignment in the backhead. HDD50 Page 2 07/25/2024... -
Page 7: Piston
CHUCK The chuck threads into the bottom end of the case with single start threads. It has internal splines that mesh with the splines on the bit body to transmit rotation. HDD50 Page 3 07/25/2024... -
Page 8: Section Ii Maintenance
• is much easier than trying to do so after the drill has been removed from the drill rig. CAUTION USE CAUTION WHEN HANDLING DOWN THE HOLE HAMMER PARTS. NUMA HAMMER PARTS ARE MANUFACTURED FROM HARDENED, HEAT TREATED MATERIALS. DROPPING OR STRIKING THESE PARTS MAY CAUSE SEVERE DAMAGE. - Page 9 Using a screwdriver, remove the backhead bearing from the groove located on the • outside diameter. Remove the backhead o-ring from the backhead. • Remove the check valve and check valve spring from the backhead. • HDD50 Page 5 07/25/2024...
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Page 10: Inspection
FEED TUBE Inspect the outside diameter for nicks, burrs and scoring. • Inspect all makeup surfaces for indentations or nicks caused by wear. • Remove all minor irregularities with emery cloth. • Replace if necessary. • HDD50 Page 6 07/25/2024... - Page 11 Remove all internal irregularities with a fine honing stone. • Remove all external irregularities with an emery cloth. • Clearance between the bit shank and bit bearing should not exceed .012" (.30 mm). • Replace if necessary. • HDD50 Page 7 07/25/2024...
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Page 12: General Assembly
All parts should be cleaned thoroughly and wiped dry before assembly. Oil all parts by hand using Rock Drill Oil to insure easy assembly. • Coat all thread connections with a thread compound to allow joints to thread easily. • HDD50 Page 8 07/25/2024... -
Page 13: Hammer Assembly
Screw the backhead into the case. • CAUTION DUE TO CLOSE TOLERANCES BETWEEN THE HDD50 INTERNAL PARTS AND THE CASE, NUMA CAN NOT ACCEPT RESPONSIBILITY FOR DAMAGE CAUSED BY WELDING ON THE CASE OD. WELDING ON THE CASE CAN CREATE DISTORTION, CAUSE PREMATURE FAILURE AND VOID THE WARRANTY. -
Page 14: Section Iii Parts Identification
005764 (1) Choke 005559 (1) Bit Retaining Ring O-Ring Feed Tube 005571 (1) 015908 (1) Bit Retaining Rings Feed Tube O-Ring 012457 (1) 009157 (1) Piston 012455 (1) Chuck SST 018857(1) Hammer Assembly #020170 Figure 3-1 HDD50 Page 10 07/25/2024... - Page 15 0.2 oz (6.8 g) Choke 3/16" Hole 007115 0.2 oz (6.8 g) Choke 1/4" Hole 007116 0.2 oz (6.8 g) (installed in hammer) HDD50 Hammer 020170 148.0 (67.1 Kg) 3-1/2 Reg Pin SST * Weight is approximate. HDD50 Page 11 07/25/2024...
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Page 16: Section Iv Air Consumption Charts
SECTION IV AIR CONSUMPTION CHARTS HDD50 DRILL PRESSURE (BAR) 13.6 20.4 27.6 34.5 1600 1400 1200 1000 94.4 DRILL PRESSURE (PSI) 3/16 (4.8mm) CHOKE SOLID CHOKE 1/8 (3.2mm) CHOKE 1/4 (6.4mm) CHOKE HDD50 Page 12 07/25/2024... -
Page 17: Section V Lubrication/Foam Use
The HDD50 hammer requires a continuous supply of the correct type Rock Drill Oil. The HDD50 hammer consumes at least two quarts (2 litres) of Rock Drill Oil per hour in order to maintain adequate lubrication. When using Environmentally Safe Oils, you must increase the injection by an additional 1 quart per hour. -
Page 18: Section Vi Storage
If at all possible, the backhead and chuck should be broken loose on the drill rig, this is much easier than trying to do so in the shop. Disassemble the hammer. • Inspect and wipe all the parts clean. • HDD50 Page 14 07/25/2024... -
Page 19: Restarting
If any internal hammer parts have oxidized, use an emery cloth to polish each part. Wash each hammer part, wipe dry, relubricate with rock drill oil and reassemble the hammer. CAUTION FAILURE TO CHECK INTERNAL PARTS BEFORE RESTARTING THE HAMMER MAY CAUSE SERIOUS DAMAGE TO THE HAMMER. HDD50 Page 15 07/25/2024... -
Page 20: Section Vii Button Bit Maintenance
BUTTON BIT MAINTENANCE GENERAL Numa button bits are designed for fast penetration and long life. Keeping the carbide buttons sharp has a direct effect on both the penetration and the tool life. As the bit wears flat, spots develop on the carbide buttons. These flat spots increase stress on the buttons causing the bit to work harder, which may cause button failure. - Page 21 For Complete Hammer Assembly #020170 Table 8-1 NOTE Class 1 Represents a user of a HDD50 hammer that has readily available spare parts. Class 2 Represents a user of a HDD50 hammer that does not have readily available spare parts. HDD50 Page 17 07/25/2024...
- Page 22 HEATING OR STRIKING THE CASE WILL VOID THE WARRANTY. 6.06 2.00 CASE / CHUCK JOINT 3.00 3.00 GRIP AREA GRIP AREA 2.50 14.32 4.00 4.00 CLAMPING IN THIS AREA WILL DISTORT THE CASE BORE HDD50 HAMMER HDD50 Page 18 07/25/2024...
- Page 23 NOTES HDD50 Page 19 07/25/2024...
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