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GR-8400

Grinding machine for the needles of nozzles

Price: on request
GR-8400. Grinding machine for the needles of nozzles

GR-8400 – Grinding machine for the needles of nozzles

The GR-8400 machine is designed for grinding and sharpening of injector nozzles (needles) for fuel injection systems used in passenger cars, commercial vehicles, as well as components for industrial and marine engines, BOSCH Piezo injector valve pins, cylinder head valves, and other cylindrical or rotating parts.

The GR-8400 machine features enlarged prisms and an extended worktable. The worktable can be positioned in one of 9 different locations on the machine base plate, depending on the part size and the required grinding angle.

Standard equipment includes:
  • Auxiliary brackets;
  • Drive pulleys for processing various components.
Optional accessories include:
  • Standard or high-precision protractor;
  • Various electronic microscopes and corresponding tooling / fixtures.

The machine accepts straight and tapered profile grinding wheels of various grit sizes. As standard, the machine is supplied with a grinding wheel with A400 grit.
The spindle speed and the rotation speed of the workpiece are controlled via rotary knobs located on the control panel. The rotation speed is displayed as a percentage.
The brightness of the lower backlight for the workpiece can be adjusted using a rotary knob located on the upper section of the control panel.
The control panel features a main power switch and three individual power switches for each motor drive and the lower backlight lamp.
On the rear side of the machine housing, there is a 220V power inlet connector and three 220V power outlets.
On the front side of the machine housing, there is a 12V connector for connecting the drive motor power cable for rotating workpieces.

Standard Delivery Set
GR-8400. Grinding machine for the needles of nozzles
Part Number Description Qty
GR-8400 Grinding / sharpening machine for injector needles with speed indicators 1 pc
*DL-UNI20200 Grinding wheel, A400 grit, for GR machine (fitted on the machine) 1 pc
DL-GRB32015 Extended part rest (workpiece support) 1 pc
DL-GRB32021 Part rest extension 1 pc
DL-GRB32016 Diamond dresser holder 1 pc
DL-NG31309 Diamond dresser (for truing / dressing grinding wheels) 1 pc
DL-NG31264 Pulley, Ø15×3 mm, for injector needles 1 pc
DL-NG31264-01 Pulley, Ø15×4 mm, for injector needles 1 pc
DL-NG31264-02 Pulley, Ø15×5 mm, for Piezo injector valve holder 1 pc
DL-NG31196 Pulley, Ø15×7 mm, for lapping tool / lap 1 pc
220V power cable 1 pc
Passport / technical description / operation manual / warranty card 1 set

* Grinding wheel is fitted on the machine.

MACHINE SPECIFICATIONS
GR-8400. Grinding machine for the needles of nozzles
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
Optional equipment
GR-8400. Grinding machine for the needles of nozzles
Part Number Name Qty Photo
DL-GR1080 Angle measurement kit for GR series machines 1 pc
DL-GR1090 High-precision angle measurement kit 1 pc
DL-NG31263 60° angle setting gauge 1 pc
DL-UNI20025 Kit with 14 MP VGA / HDMI microscope 1 pc
DL-UNI20030 14 MP microscope kit with USB and HDMI outputs 1 pc
DL-UNI20026 38 MP microscope kit with HDMI and USB, 1080P Full HD 1 pc
DL-UNI20027 38 MP microscope kit with HDMI and USB, 1080P Full HD 1 pc
DL-UNI20032 37 MP microscope kit with HDMI and USB, 1080P Full HD 1 pc
DL-NG50196 Grinding wheel puller with arbor for spindle taper 1 pc
OPTIONAL EQUIPMENT AND CONSUMABLES
Part Number Name Qty Photo
DL-CR50405-5
DL-CR50405-10
DL-CR50405-15
Collet chuck holder (collet) for BOSCH Piezo injector valves, radial runout 1–5; 6–10; 11–15 µm. Designed for geometry restoration by lapping. Used for BOSCH Piezo injectors of the 0445115 series. Clamping is performed using a clamping sleeve.

 

1 pc
DL-CR50209-5

DL-CR50209-10

DL-CR50209-15

Collet chuck holder (collet) for BOSCH Piezo injector valves, radial runout 1–5; 6–10; 11–15 µm. Designed for geometry restoration by lapping. Used for BOSCH Piezo injectors of the 0445115 series. Clamping is performed using a clamping washer.

 

1 pc
DL-UNI20200 Abrasive grinding wheel, 400 grit 1 pc
DL-UNI20201 Abrasive grinding wheel, 200 grit 1 pc
DL-UNI20202 Abrasive grinding wheel, 100 grit 1 pc
DL-UNI20203 Tapered abrasive grinding wheel, 320 grit 1 pc
DL-UNI20204 Tapered abrasive grinding wheel, 230 grit 1 pc
DL-GR1050 Stone holder (mandrel) 1 pc
DL-GR1060 Axle for stone balancing 1 pc
DL-GR1070 Balancing device 1 pc
Pulley, 23.0 mm 1 pc
Pulley 20.5 mm 1 pc
Pulley 17.0 mm 1 pc
Pulley 14.0 mm 1 pc
Pulley 9.5 mm 1 pc
Pulley 9.0 mm 1 pc
Pulley 8.0 mm 1 pc
Pulley 6.5 mm 1 pc
Pulley 6.0 mm 1 pc
Pulley 5.5 mm 1 pc
DL-GRB50436 Small prism holder assembly for GR-8400 machine 1 set
DL-GRB50437 Large prism holder assembly for GR-8400 machine 1 set
DL-GRB32015 Extended part rest for GR-8400 machine 1 pc
DL-GRB32016 Diamond dresser holder for GR-8400 machine 1 pc
DL-GRB32020 Large plastic prism for GR-8400 machine 1 pc
DL-GRB32021 Part rest extension for GR-8400 machine 1 pc

 

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