CGK-500 / CGK-800 / CGK-1080 CNC High-Precision Thread Grinder
Grind Precision Threads for Rolling-Function Components
The CGK-500/800/1080 series is built for finish-grinding the ball screws, planetary screws and trapezoidal screws that drive modern machine tools and automation.
The CGK-500 / CGK-800 / CGK-1080 is a family of CNC high-precision thread grinders for the rolling-function-components industry. It finish-grinds arc ball screws, planetary screws, high-precision trapezoidal screws and other thread profiles on workpieces up to Φ300 mm. The moving-table design covers thread lengths from 380 mm on the CGK-500 to 1100 mm on the CGK-1080, with between-centers distances from 500 mm to 1250 mm. An industrial CNC system with full closed-loop feedback controls single-pass and fully automatic grinding cycles, multi-start threads from 1 to 99 starts, dynamic tool setting, pitch compensation, pitch-taper compensation and automatic wheel-dress compensation. The result is thread geometry held to 0.004 mm within a 2π arc and surface roughness down to Ra 0.32 μm.
Request a Quote →Key Features & Working Principle
Six capabilities that make the CGK-500/800/1080 a complete thread-grinding solution.
Three Bed Lengths
CGK-500, CGK-800 and CGK-1080 cover 380 mm, 750 mm and 1100 mm grindable thread lengths for small, medium and long ball screws.
Full Closed-Loop CNC Control
Precision linear scale feedback on linear axes and a rotary encoder on the work spindle provide closed-loop positioning and repeatability.
Single-Pass & Automatic Cycles
Select single-pass grinding for setup and proving, or fully automatic cycle grinding for production runs.
Multi-Start Thread Grinding
The CNC control grinds 1 to 99 starts automatically, eliminating manual indexing on multi-start worms and ball screws.
Intelligent Compensation
Dynamic tool setting, pitch compensation, pitch-taper compensation and automatic wheel-dress compensation keep size stable.
Rigid Machine Construction
A high-strength alloy cast-iron bed and worktable with precision-scraped guideways support heavy grinding cuts without size drift.
Why Choose the CGK-500 / CGK-800 / CGK-1080
A dedicated thread grinder delivers the profile accuracy and surface finish that turning or milling cannot reach on hardened screws.
Micron-Level Thread Accuracy
Profile error within 2π arc is held to 0.004 mm, and cumulative error over 300 mm is within 0.005 mm on all three models.
Mirror Surface Finish
Thread surface roughness reaches Ra≤0.32 μm, giving ball screws and planetary screws the smooth raceways needed for long life and low noise.
Wide Pitch Coverage
Metric pitches from 0.5 mm to 48 mm, imperial threads from 2 to 18/48 TPI and module threads from 1 to 18 cover most ball and trapezoidal screw specifications.
Large Helix Angle Range
CGK-500 and CGK-800 grind helix angles up to ±30°; CGK-1080 extends the range to ±35° for steeper lead screws.
Matched to Part Length
Three bed lengths let you match machine investment to your typical screw length instead of oversizing every machine.
Planetary-Screw Ready
The control resolution, multi-start capability and high wheel-spindle speed support the complex thread forms used in planetary roller screws.
CGK-500 / CGK-800 / CGK-1080 — Technical Data
Main technical performance indicators from the factory datasheet.
| Parameter | Unit | CGK-500 | CGK-800 | CGK-1080 |
|---|---|---|---|---|
| Model | — | CNC thread grinder | CNC thread grinder | CNC thread grinder |
| Max grindable diameter (disc type) | mm | Φ300 | Φ300 | Φ300 |
| Max grindable diameter with steady rest | mm | Φ80 | Φ80 | Φ80 |
| Min grindable diameter | mm | Φ8 | Φ8 | Φ10 |
| Max distance between centers | mm | 500 | 800 | 1250 |
| Max grindable thread length | mm | 380 | 750 | 1100 |
| Center height | mm | 180 | 180 | 245 |
| Metric thread pitch | mm | 0.5–48 | 0.5–48 | 0.5–48 |
| Imperial thread pitch | TPI | 2–18 | 2–18 | 2–48 |
| Module thread range | module | 1–18 | 1–18 | 1–18 |
| Max grindable helix angle | — | ±30° | ±30° | ±35° |
| Grindable thread starts | — | 1–99 | 1–99 | 1–99 |
| Workpiece speed | rpm | 0–80 | 0–80 | 0–100 |
| Table moving speed | m/min | 0–5.0 | 0–5.0 | 0–5.0 |
| Wheel carriage in/out speed | m/min | 0–5.0 | 0–5.0 | 0–5.0 |
| Dresser feed speed | m/min | 0–1 | 0–1 | 0–1 |
| X / Y / Z axis resolution | mm | 0.001 | 0.001 | 0.001 |
| C-axis resolution | — | 0.001° | 0.001° | 0.001° |
| Wheel carriage cross travel | mm | 150 | 150 | 220 |
| Wheel spindle speed | rpm | 1000–3000 | 1000–3000 | 1000–3000 |
| Grinding wheel size (OD × ID) | mm | Φ400 × Φ203 | Φ400 × Φ203 | Φ500 × Φ305 |
| Overall dimensions (L × W × H) | mm | 3000 × 2000 × 2000 | 3500 × 2000 × 2000 | 5100 × 2700 × 2250 |
| Machine weight | kg | 5000 | 6000 | 11000 |
| Helical accuracy within 2π arc | mm | ≤0.004 | ≤0.004 | ≤0.004 |
| Helical accuracy over 300 mm | mm | ≤0.005 | ≤0.005 | ≤0.005 |
| Thread surface roughness | μm | Ra≤0.32 | Ra≤0.32 | Ra≤0.32 |
Applications
Built for manufacturers of precision threaded drive components across machine-tool, automation and heavy-equipment industries.
Frequently Asked Questions
What parts can the CGK-500 / CGK-800 / CGK-1080 grind?
What thread lengths do the three models cover?
What pitch and helix range can be ground?
How is grinding accuracy maintained?
What is the difference between the three models?
What information is needed for a quotation?
Configure a CGK-500 / CGK-800 / CGK-1080 Thread Grinder
Send us your workpiece diameter and length, thread form and pitch, helix angle, number of starts, accuracy class and surface-finish requirements, material and hardness, and annual volume. Our engineering team will recommend CGK-500, CGK-800 or CGK-1080 and prepare a quotation.
Request a Quote →
