The GS100 CNC External Thread Grinding Machine is a high-efficiency grinding solution specially designed for precision threaded components, focusing on the core values of "improving quality and efficiency, reducing costs and waste".
✓ Complete multiple processes in one clamping, shortening the production cycle by 50%
✓ High-precision grating feedback, controlling thread tolerance within ±0.001mm
✓ Automatic helix angle adjustment, adaptable to complex components such as screw rods, worms and thread gauges
✓ Optimized cooling system, reducing surface burning rate to below 2%
✓ Customized process solutions, cutting scrap rate by more than 30%
As the core advantage of the GS100 CNC External Thread Grinding Machine, its CNC automation capability completely solves the accuracy fluctuation and efficiency bottleneck of traditional thread grinding, helping manufacturers seize the high-end component market.
The GS100 CNC External Thread Grinding Machine is an automated device dedicated to processing high-precision threaded components, suitable for grinding precision parts such as screw rods, worms and thread gauges. Its core features include:
- CNC Automatic Helix Angle Adjustment: A-axis automatically adapts to helix angles ranging from -25° to +25° without manual intervention;
- One-clamping Completion: Integrates all processes including feeding, grinding, retracting, grinding wheel dressing and spindle oscillation;
- High-precision Control: Heidenhain grating feedback + Siemens 828D system, ensuring thread tolerance of ±0.001mm;
- High-efficiency Grinding: Grinding wheel spindle speed ranges from 0 to 4,500 rpm, and C-axis supports multi-start thread processing.
a) Application: Threaded components such as thread gauges, screw rods and worms are core parts in machinery manufacturing and measuring tool testing. Widely used in the automotive, aerospace and measuring tool production sectors, they ensure the accuracy and interchangeability of threaded connections.
b) Material/Geometric Characteristics:
- Materials: Stainless steel, alloy tool steel (e.g., Cr12MoV)
- Structure: Precision threads (lead error ≤ 0.002mm), thin-walled/complex curved surfaces (e.g., worm helicoids)
- Dimensions: Small-sized (diameter Φ4-Φ100mm), high-precision tolerance (±0.001mm)
c) Common Risks:
- Processing Risks: Deformation (of thin-walled components), excessive surface roughness (Ra > 0.32μm), thread profile error
- Limitations of Traditional Processes: Large clamping error in multi-process operations, low accuracy in manual helix angle adjustment, insufficient efficiency
Pain Point 1: Insufficient Accuracy Leading to High Scrap Rate
- Efficiency Impact: Rework rate increased by 20%, production cycle extended by 15%
- Cost Impact: Additional rework cost of 5,000 yuan per batch (100 pieces)
- Quality Impact: Scrap rate as high as 15%
Pain Point 2: Large Clamping Error in Multi-process Operations
- Efficiency Impact: Clamping time accounts for 30%, single-piece processing time extended by 40%
- Cost Impact: Manual clamping cost increased by 30 yuan per piece
- Quality Impact: Thread coaxiality error exceeds ±0.005mm
Pain Point 3: Low Efficiency in Helix Angle Adjustment
- Efficiency Impact: 30 minutes required for manual adjustment per piece, causing order delays in batch production
- Cost Impact: Equipment idle rate increased by 25%
- Quality Impact: Helix angle error of ±0.5°, resulting in component assembly failure
Complete Processing Chain: Blank Preparation → Rough Grinding → Semi-finish Grinding → Finish Grinding → Surface Treatment → Quality Inspection
Core Role of GS100: Covers the entire process from rough grinding to finish grinding, realizing "completion of all grinding processes in one clamping" through CNC automation.
Process Connection:
- Blank: Alloy tool steel subjected to quenching and tempering treatment
- Rough Grinding: Rapid stock removal (high-speed rotation of GS100 grinding wheel spindle)
- Semi-finish Grinding: Correction of shape error (C-Z axis linkage)
- Finish Grinding: Guarantee of high precision (closed-loop control with grating feedback)
- Surface Treatment: Deburring + rust prevention
- Quality Inspection: Thread precision measurement via coordinate measuring machine (CMM)
a) Rough Grinding Process
- Specific Method: Adopt diamond grinding wheel, with feeding along the thread axis + synchronous rotation of workpiece (C-Z linkage)
- Parameter Range: Grinding wheel speed 2,000-3,000 rpm, feed rate 0.01 mm/r, depth of cut 0.05 mm
- Risk and Control: Surface burning → high-pressure cooling system (Qinchuan cutting fluid filtration); deformation → constant temperature workshop (±2ºC)
- Key Equipment: GS100 CNC External Thread Grinding Machine, diamond grinding wheel
b) Semi-finish Grinding Process
- Specific Method: Reduce feed rate after grinding wheel dressing to correct thread profile
- Parameter Range: Grinding wheel speed 3,000-4,000 rpm, feed rate 0.005 mm/r, depth of cut 0.02 mm
- Risk and Control: Profile error → real-time compensation by Siemens 828D system; vibration → shock absorption of THK guide rails
- Key Equipment: GS100 (grating feedback), grinding wheel dresser
c) Finish Grinding Process
- Specific Method: Closed-loop control of feed rate to ensure thread accuracy
- Parameter Range: Grinding wheel speed 4,000-4,500 rpm, feed rate ≤ 0.002 mm/r, depth of cut 0.005 mm
- Risk and Control: Tolerance deviation → Heidenhain grating feedback (±0.001mm); surface roughness → low-speed finish grinding + cooling
- Key Equipment: GS100 (high-precision C-axis), coordinate measuring machine (CMM)
d) Quality Inspection Process
- Specific Method: Test thread lead, profile angle and surface roughness
- Parameter Range: Ra ≤ 0.32μm, tolerance ±0.001mm
- Risk and Control: Inspection error → regular calibration of measuring instruments; missing inspection → AI vision-assisted inspection
- Key Equipment: Coordinate measuring machine (CMM), AI vision inspection system
| Indicator |
Traditional Process |
GS100 Solution |
Improvement |
| Scrap Rate |
15% |
4% |
-73% |
| Production Cycle (for 100 pieces) |
2 days |
1 day |
-50% |
| Labor Cost (for 100 pieces) |
¥5,000 |
¥3,500 |
-30% |
| Thread Tolerance |
±0.005 mm |
±0.001 mm |
+80% Accuracy |
Scenario A: Cost Reduction and Efficiency Improvement in Mass Production of Thread Gauges
- Process Package:
- Route: Blank → Rough Grinding → Semi-finish Grinding → Finish Grinding → Quality Inspection
- Equipment: 2 sets of GS100 (parallel production)
- Tools: Diamond grinding wheel + high-pressure cooling system
- Parameters: Rough grinding at 2,500 rpm / 0.01 mm/r; finish grinding at 4,500 rpm / 0.002 mm/r
- Quality Control: 100% inspection by coordinate measuring machine (CMM)
- Comparison: Scrap rate reduced from 15% to 4%, production cycle shortened from 2 days to 1 day, cost cut by 30%
Scenario B: Rapid Delivery for Small-batch Production
- Process Package:
- Route: Completion of all grinding processes in one clamping
- Equipment: GS100 (automatic helix angle adjustment)
- Tools: Quick grinding wheel changing system
- Parameters: Adaptive speed 3,500-4,500 rpm, feed rate 0.008 mm/r
- Quality Control: Online vision inspection
- Comparison: Delivery time shortened from 3 days to 1 day, unit cost reduced from 80 yuan to 60 yuan
Scenario C: High-precision Multi-start Thread Processing
- Process Package:
- Route: Finish Grinding + Synchronous Grinding of Multi-start Threads
- Equipment: GS100 (high-precision C-axis)
- Tools: Customized multi-start grinding wheel
- Parameters: Finish grinding at 4,500 rpm / 0.001 mm/r, automatic helix angle adjustment ±25°
- Quality Control: Closed-loop control with grating feedback
- Comparison: Thread tolerance reduced from ±0.005mm to ±0.001mm, scrap rate cut from 20% to 3%
Parameters and Configuration
| Technical Parameter Item |
Unit |
GS100 Parameter Value |
| Thread Diameter Before Grinding |
mm |
Φ4-Φ100 |
| Grinding Thread Length |
mm |
100 |
| Center Height |
mm |
150 |
| Center Distance |
mm |
200 |
| Grindable Helix Angle |
deg |
±25 |
| Machine Tool Stroke (X/Z) |
mm |
350/300 |
| Grinding Wheel Size (Outer Diameter × Inner Diameter × Thickness) |
mm |
Φ400×Φ203×1 |
| Grinding Wheel Spindle Speed |
rpm |
0-4500 |
| Workpiece Spindle Speed |
rpm |
0-200 |
| Maximum Speed of Correction Spindle |
rpm |
- |
| Machine Tool Dimensions (L×W×H) |
mm |
4900×2550×2100 |
| Machine Tool Weight |
kg |
5500 |
| Configuration Item |
Brand/Model |
| CNC System |
Siemens 828D |
| Drive and Motor |
Siemens Servo Drive System |
| X, Z Axis Ball Screw |
THK/NSK |
| X, Z Axis Guide Rail |
THK/INNA |
| X, Z Axis Grating Scale |
Heidenhain (Germany) |
| Workpiece Spindle |
Jinjia |
| Grinding Wheel Spindle |
Kaige |
| Dressing Spindle |
Kaige |
| Workpiece Spindle Encoder |
Guoce Time Grating |
| A Axis Encoder |
Guoce Time Grating |
| Cutting Fluid Filtration System |
Qinchuan (Magnetic + Paper Belt + Water Cooling) |
| Spindle Oil Chiller |
Tongfei Refrigeration |
| Compressed Air Dryer Filter |
Neumann & Techel |
| Grinding Spindle Inverter |
Feishi |
Audited Supplier 
){kind=link}