⚙️ Precision Grinder

CGK-38 CNC Precision Linear Rolling Guide Grinder

A high-precision CNC grinder purpose-built for rolling linear guide rails. Type I and Type II configurations grind both sides and the reference plane of guide rails up to 4000 mm long, holding raceway parallelism within 0.008 mm and surface finish down to Ra 0.32 μm.

Request a Quote Technical Specs ↓

5450 mm

Worktable Travel

4000 mm

Grindable Guide Length

0.004 mm

Positioning Accuracy

Ra 0.32 μm

Surface Roughness

Grind Linear Guide Rails to Precision Geometry

The CGK-38 produces the side faces and reference planes that determine the accuracy of rolling linear guide rails.

CGK-38 CNC precision linear rolling guide grinder in a production plant

Rolling linear guide rails depend on precisely ground side faces and reference planes to give smooth, repeatable motion over long service life. The CGK-38 is a high-precision CNC grinder purpose-built for this industry, with vertical and horizontal grinding heads arranged in two configurations: Type I places the horizontal head on a fixed gantry and two vertical heads on saddles beside the worktable; Type II mounts both heads on the gantry with one vertical head sharing a saddle with the horizontal head. Either layout grinds guide-rail sides and reference planes up to 4000 mm long, holding raceway parallelism within 0.008 mm per 4000 mm and ground-guide size consistency within 0.003 mm. A purpose-built CNC control, precision linear-scale feedback and constant-temperature coolant support stable, high-accuracy production.

Request a Quote →

Key Features & Working Principle

Six capabilities that make the CGK-38 accurate and productive on linear guide rails.

1️⃣

Vertical + Horizontal Grinding Heads

Two layout options combine vertical and horizontal grinding heads so both side faces and the reference plane of a guide rail are ground in one setup.

2️⃣

Long Worktable Travel

A 5450 mm worktable travel supports guide rails up to 4000 mm long, covering the long beds used in machine tools and automation equipment.

3️⃣

Precision Linear Scale Feedback

Closed-loop linear scales deliver 0.004 mm positioning accuracy and 0.001 mm system resolution, holding consistent geometry across the full rail length.

4️⃣

Diamond Roller / Pen Dressing

Grinding wheels are dressed with diamond rollers as standard, with optional single-crystal diamond dressing pens for special profiles.

5️⃣

Constant-Temperature Coolant

A high-flow coolant system with temperature control removes grinding heat and swarf, protecting surface finish and dimensional stability.

6️⃣

Automatic Wheel Dressing Compensation

The control software supports mid-process dressing and automatic wheel-wear compensation, keeping size consistency within 0.003 mm over long runs.

Why Choose the CGK-38

Against general-purpose guideway grinders, the CGK-38 wins on rail length, precision and automation.

🎯

Built for Guide Rails

The machine is purpose-built for rolling linear guide rails, with worktable travel, wheel sizes and dressing systems matched to rail geometry.

🏆

Micron-Level Consistency

0.003 mm ground-guide size consistency and 0.008 mm raceway parallelism per 4000 mm keep rail pairs matched and motion smooth.

⚙️

Two Configurations for Different Shops

Type I offers higher power and more servo axes for high-volume rail production; Type II offers a compact gantry layout for shops that need flexibility.

📐

Long Rail Capability

4000 mm grindable guide length covers the long rails used in large machine tools, gantry systems and automation lines.

🛡️

Automated Grinding Cycle

Electromagnetic chuck clamping, automatic dressing and coolant control let the machine run with minimal operator intervention.

💰

Competitive Value

The CGK-38 combines precision grinding mechanics, stable CNC control and high-volume rail processing at a lower total cost than importing equivalent capacity.

CGK-38 — Technical Data

Main technical performance indicators from the factory datasheet.

Parameter	Unit	CGK38-I	CGK38-II
Model	—	CGK-38 Type I	CGK-38 Type II
Worktable travel	mm	5450	5450
Ground workpiece specification	mm	20–100	20–100
Grindable guide length	mm	4000	4000
Worktable moving speed	m/min	0.5–20	0.5–20
Vertical grinding head power	kW	30	18.5
Horizontal grinding head power	kW	15	7.5
Positioning accuracy	mm	0.004	0.004
System resolution	mm	0.001	0.001
Vertical grinding head speed	rpm	3000	1500
Horizontal grinding head speed	rpm	3000	1500
Vertical grinding wheel diameter	mm	Φ500–Φ350	Φ500–Φ350
Horizontal grinding wheel diameter	mm	Φ500–Φ350	Φ400–Φ300
Raceway parallelism	mm	0.008/4000	0.008/4000
Ground guide size consistency	mm	0.003	0.003
Workpiece surface roughness	μm	Ra0.32	Ra0.32

Materials & Industries Served

Designed for manufacturers producing the rolling linear guide rails that enable precision motion in machine tools and automation.

🔩

Rolling Linear Guide Rails

20–100 mm · up to 4000 mm

🏭

Machine Tool Guideways

CNC machines · lathes · mills

🤖

Automation Equipment Rails

Robots · linear modules

⚙️

Linear Motion Component Plants

Block + rail matched production

📐

High-Precision Rail Shops

Ra 0.32 · 0.003 mm consistency

🔄

Mixed-Spec Rail Production

Type I / Type II configuration

Frequently Asked Questions

What is the CGK-38 used for?

It is a high-precision CNC grinder for rolling linear guide rails. It grinds both side faces and the reference plane of guide rails up to 4000 mm long, producing the geometry and surface finish needed for smooth rolling-block motion.

What is the difference between Type I and Type II?

Type I mounts the horizontal grinding head on a fixed gantry and places two vertical grinding heads on saddles beside the worktable, giving more servo axes and higher power. Type II mounts both heads on the gantry, with one vertical head sharing a saddle with the horizontal head for a more compact layout. Both achieve the same 0.008/4000 mm raceway parallelism and Ra 0.32 μm surface finish.

What guide-rail sizes can the CGK-38 grind?

The machine handles guide-rail workpiece cross-sections from 20 mm to 100 mm and lengths up to 4000 mm. The worktable travel is 5450 mm.

What grinding accuracy does the CGK-38 achieve?

Positioning accuracy is 0.004 mm with 0.001 mm system resolution. Ground-guide size consistency is 0.003 mm, raceway parallelism is 0.008 mm per 4000 mm, and workpiece surface roughness reaches Ra 0.32 μm.

How are grinding wheels dressed during production?

Diamond roller dressing is standard. Single-crystal diamond dressing pens are optional. The CNC control supports mid-process dressing and automatic wheel-wear compensation.

What information is needed for a quotation?

Send us your guide-rail cross-section range, maximum rail length, daily production target, required surface finish and parallelism, and whether you prefer the Type I or Type II configuration. Include power supply, foundation, coolant and workshop layout details — our engineering team will prepare a machine configuration with confirmed specifications and a quotation.

Configure a CGK-38 for Your Guide-Rail Production