CGK-1500 CNC High-Precision Thread Grinder
Grind Long Precision Threads in One Pass
The CGK-1500 extends high-accuracy thread grinding to ball screws and planetary screws up to 1500 mm long.
The CGK-1500 is a CNC high-precision thread grinder for the rolling-function-components industry. It finish-grinds arc ball screws, planetary screws, high-precision trapezoidal screws and other thread profiles on workpieces from Φ12 mm up to Φ360 mm, with grindable thread lengths up to 1500 mm and 1600 mm between centers. A moving-table design, industrial CNC control and full closed-loop feedback from precision linear scales and a rotary encoder maintain profile accuracy to 0.005 mm within a 2π arc and 0.008 mm over any 300 mm span. The machine supports 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, achieving thread surface roughness down to Ra 0.32 μm.
Request a Quote →Key Features & Working Principle
Six capabilities that make the CGK-1500 the right choice for long, large-diameter precision screws.
1500 mm Thread Length
The moving worktable covers thread lengths up to 1500 mm with 1600 mm between centers for long ball screws and lead screws.
Large Diameter Range
Grinds workpieces from Φ12 mm to Φ360 mm, or down to Φ6 mm on special order, covering small to large power-transmission screws.
Full Closed-Loop CNC Control
Precision linear scales on linear axes and a rotary encoder on the work spindle feed back to the CNC for stable, repeatable positioning.
Single-Pass & Automatic Cycles
Choose single-pass grinding for setup and proving, or fully automatic cycle grinding for long 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 thread geometry consistent.
Why Choose the CGK-1500
When screws get longer and larger, a dedicated long-bed thread grinder is the only way to hold micron-level accuracy.
Long-Part Capability
1500 mm grindable thread length and 1600 mm between centers handle the long ball screws used in large machine tools and presses.
High Profile Accuracy
Profile error within a 2π arc is held to 0.005 mm, and cumulative error over 300 mm is within 0.008 mm.
Mirror Surface Finish
Thread surface roughness reaches Ra≤0.32 μm, giving ball and planetary screws the smooth raceways needed for long life and low noise.
Wide Pitch & Helix Range
Metric pitches from 1.5 mm to 48 mm, imperial threads from 2 to 18 TPI, module threads from 1 to 18 and helix angles up to ±25° cover most screw specifications.
Heavy Rigid Construction
A 12 000 kg machine weight, high-strength alloy cast-iron bed and precision-scraped guideways control vibration and thermal drift on long parts.
Multi-Start Productivity
Programmable 1–99 starts eliminate manual indexing and rechucking, improving throughput on multi-start planetary and ball screws.
CGK-1500 — Technical Data
Main technical performance indicators from the factory datasheet.
| Parameter | Unit | CGK-1500 |
|---|---|---|
| Model | — | CNC thread grinder |
| Max grindable diameter (disc type) | mm | Φ360 |
| Max grindable diameter with steady rest | mm | Φ160 |
| Min grindable diameter | mm | Φ12 (Φ6 on request) |
| Max distance between centers | mm | 1600 |
| Max grindable thread length | mm | 1500 |
| Center height | mm | 210 |
| Metric thread pitch | mm | 1.5–48 |
| Imperial thread pitch | TPI | 2–18 |
| Module thread range | module | 1–18 |
| Max grindable helix angle | — | ±25° |
| Grindable thread starts | — | 1–99 |
| Workpiece speed | rpm | 0–150 |
| Table moving speed | m/min | 0–5.0 |
| Wheel carriage in/out speed | m/min | 0–5.0 |
| Dresser feed speed | m/min | 0–1 |
| X / Y / Z axis resolution | mm | 0.001 |
| C-axis resolution | — | 0.001° |
| Wheel carriage cross travel | mm | 220 |
| Wheel spindle speed | rpm | 1000–3000 |
| Grinding wheel size (OD × ID) | mm | Φ500 × Φ305 |
| Overall dimensions (L × W × H) | mm | 6000 × 2200 × 2100 |
| Machine weight | kg | 12000 |
| Helical accuracy within 2π arc | mm | ≤0.005 |
| Helical accuracy over 300 mm | mm | ≤0.008 |
| Thread surface roughness | μm | Ra≤0.32 |
Applications
Built for manufacturers of long precision threaded drive components.
Frequently Asked Questions
What parts can the CGK-1500 grind?
What is the maximum thread length and diameter?
What pitch and helix range can be ground?
How is grinding accuracy maintained?
What makes the CGK-1500 different from smaller thread grinders?
What information is needed for a quotation?
Configure a CGK-1500 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 configure the CGK-1500 and prepare a quotation.
Request a Quote →
