Common-Rail

DL-GR7300

Grinding machine for the needles of nozzles with speed indicators

Price: on request
DL-GR7300. Grinding machine for the needles of nozzles with speed indicators
Injector nozzle grinding machine

GR-7300 — Injector nozzle grinding machine

The GR-7300-Machine for sharpening needles of atomizers and other bodies of rotation.

Not sure which additional equipment you need?
Tell us injectors you see most often — we’ll configure the machine for you.

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Supported Systems and Technical Capabilities

  • Grinding machine for injector nozzles and other rotating bodies
  • Processor-controlled operation with digital RPM display
  • Maximum spindle speed: 7,300 RPM
  • Maximum workpiece rotation speed: 1,200 RPM
  • Independent speed control of spindle and rotating body
  • Fine-grained electrocorundum grinding wheel for precision sharpening

Benefits for Your Workshop

      • Lower cost for injector repair

Allows worn nozzle needles to be restored and reused instead of replaced, reducing spare-part costs and lowering the total repair cost per injector.

      • High-Precision Needle Grinding

Ensures accurate geometry and surface finish of nozzles and small rotating parts.

      • Full Speed Control and Monitoring

Digital RPM indicators allow precise adjustment and repeatable results.

      • Integrated Visual Inspection

When used with the DL-UNI20025 kit, operators can inspect sharpening results in real time.

More information

  • The DL-GR7300 is designed for professional sharpening of nozzle needles and other precision rotating components used in diesel and industrial applications.
  • The machine is controlled by a processor, and both spindle speed and workpiece rotation speed are clearly displayed on the control panel for accurate adjustment.
  • The grinding system uses a fine-grained electrocorundum wheel, providing smooth surface finish and stable sharpening quality.
  • Suitable for diesel service centers, injector repair workshops, and precision mechanical service facilities.
  • Optional angle meters DL-GR1080 and DL-GR1090 can be installed for precise angle measurement during sharpening operations.
  • The machine is typically used together with the DL-UNI20030 kit, which includes:

Electronic industrial microscope
Holder and backlight
Monitor for visual inspection during sharpening

SET OF DELIVERY
BASIC SET
No. Image Description Qty
1 GR-7300 GR-7300 — Piezo injector needle grinding machine 1 pc
2 DL-UNI20200 DL-UNI20200 — Grinding wheel, grit 400 1 pc
3 DL-NG31290 DL-NG31290 — Extension for installing long parts for grinding 2 pc
4 DL-NG31309 DL-NG31309 — Pen for dressing the grinding wheel 1 pc
5 DL-NG31264 — Pulley Ø15×3 for nozzle needle 1 pc
6 DL-NG31264-01 — Pulley Ø15×4 for nozzle needle 1 pc
7 DL-NG31264-02 — Pulley Ø15×5 for valve holder of piezo injector 1 pc
8 DL-NG31196 — Pulley Ø15×7 for lapping 1 pc
9 Power cable 220 V 1 pc
10 Manual 1 pc
Additional Equipment
For convenient work GR-7300
Image Description Qty
DL-GR1080 DL-GR1080. Angle measuring kit 1 pc
DL-GR1090 DL-GR1090. High Precision Angle Measurement Kit 1 pc
DL-NG31263 DL-NG31263. Gauge for setting the angle of 60 degrees 1 pc
DL-NG31866 DL-NG31866. Stop extension for DL-GR7300, DL-GR7400, DL-GR7500 machines 1 pc
DL-UNI20025 DL-UNI20025. Microscope set VGA, HDMI 14 MP 1 pc
DL-UNI20030 DL-UNI20030. Microscope set USB, HDMI 14 MP 1 pc
DL-UNI20026 DL-UNI20026. Microscope set HDMI USB 1080P FHD 38MP 1 pc
DL-UNI20027 DL-UNI20027. Microscope set HDMI USB 1080P FHD 38MP 1 pc
DL-UNI20032 DL-UNI20032. Microscope set HDMI USB 1080P FHD 37MP 1 pc
DL-NG50196 DL-NG50196. Wheel remover with mandrel with spindle taper 1 pc
Additional Equipment
GR-7300
Image Description Qty
DL-NG31253 DL-NG31253. Mandrel holder for the valve (pin) of the BOSCH piezo injector for grinding it 1 pc
DL-CR50405-5 / DL-CR50405-10 / DL-CR50405-15
DL-CR50405-5,
DL-CR50405-10,
DL-CR50405-15
.
Collet cartridge holder (collet) for the valve of BOSCH piezo injectors, runout
1-5;
6-10;
11-15
microns. To restore geometry by grinding. Suitable for BOSCH piezo injectors series 0445115		 1 pc
DL-CR50209-5 / DL-CR50209-10 / DL-CR50209-15
DL-CR50209-5,
DL-CR50209-10,
DL-CR50209-15
.
Collet cartridge holder (collet) for the valve of BOSCH piezo injectors, runout
1-5;
6-10;
11-15
microns. To restore geometry by grinding. Suitable for BOSCH piezo injectors series 0445115		 1 pc
DL-UNI20200 DL-UNI20200. Grinding wheel, grit of 400 1 pc
DL-UNI20201 DL-UNI20201. Grinding wheel, grit 200 1 pc
DL-UNI20202 DL-UNI20202. Grinding wheel, grit 100 1 pc
DL-UNI20203 DL-UNI20203. Grinding wheel conical, grit 320 1 pc
DL-UNI20204 DL-UNI20204. Grinding wheel conical, grit 230 1 pc
DL-GR1050 DL-GR1050. Wheel holder (mandrel) 1 pc
DL-GR1060 DL-GR1060. Shaft for balancing grinding wheel 1 pc
DL-GR1070 DL-GR1070. Balancing device 1 pc
Technical Data
GR-7300
Parameter DL-GR7300 DL-GR7400 DL-GR7500 DL-GR8400
Max. cross travel ± 12.5 mm ± 12.5 mm ± 12.5 mm ± 12.5 mm
Max. longitudinal travel ± 12.5 mm ± 12.5 mm ± 12.5 mm ± 12.5 mm
Worktable swivel angle 270° 270° 270° 270°
Spindle speed 7,300 rpm 7,400 rpm 7,500 rpm 7,400 rpm
Workpiece rotation speed 1,000 rpm
(2,000 rpm*)		 1,000 rpm (2,000 rpm*) 1,000 rpm
(2,000 rpm*)		 1,000 rpm (2,000 rpm*)
Main motor voltage 36 V 36 V 36 V 36 V
Speed control Microprocessor PWM regulators PWM regulators PWM regulators
Power supply voltage ~220 V ± 15% ~220 V ± 15% ~220 V ± 15% ~220 V ± 15%
Overall dimensions (L×W×H) 360×320×280
mm		 360×320×280
mm		 360×320×280
mm		 470×340×300
mm
Housing dimensions (L×W×H) 340×240×260 mm 340×240×260 mm 340×240×260 mm >370×270×300 mm
Net weight 35 kg 35 kg 35 kg 35 kg

*Special order.

VIDEOS
GR-7300

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