Precision Linear Shaft for Linear Bearings and Automation Systems
DLY precision linear shafts are hardened, ground and polished round shafts designed for smooth linear motion with linear bearings, shaft supports and custom guide assemblies. They are widely used in CNC machines, 3D printers, packaging equipment, linear modules and general automation systems.
DLY supplies precision linear shafts in standard and custom specifications, with diameter options from 8 mm to 150 mm, hardness options of HRC 58–62 / HRC62±2, and tolerance grades including g6, h6 and h7.
Product Specifications
The main purchasing information for a precision linear shaft includes diameter, material, hardness, tolerance, surface condition, length and whether custom machining is required.
| Product Type | Precision Linear Shaft / Linear Motion Shaft / Linear Bearing Shaft |
| Material | GCr15 bearing steel for higher wear resistance; C45 high carbon steel for general linear motion applications |
| Diameter Range | 8 mm – 150 mm |
| Hardness | HRC 58–62 / HRC62±2 options |
| Tolerance Grade | g6 / h6 / h7 available according to bearing fit and application requirement |
| Surface Condition | Hardened, ground, polished or chrome plated; anti-rust protection available for export shipment |
| Length | Standard length and custom cut-to-length supply according to order requirement |
| Custom Processing | End machining can be supplied according to customer drawings |
| Matched Components | Linear bearings, shaft supports, supported linear rails and custom linear motion assemblies |
Designed for Smooth and Stable Linear Motion
In a linear motion system, the shaft directly affects how smoothly the bearing slides. A shaft with unstable diameter, rough surface, insufficient hardness or poor straightness may cause tight movement, vibration, noise or faster bearing wear.
DLY precision linear shafts are produced for stable bearing contact and repeatable movement. They are suitable for buyers who need replacement shafts, batch purchasing, OEM machine assembly or matched linear motion components from one supplier.
Key Product Advantages
Stable Bearing Fit
Tolerance options such as g6, h6 and h7 help match different linear bearing and housing requirements.
Smooth Running Surface
Ground and polished surface quality supports smoother sliding movement and helps reduce friction during operation.
Custom Length Supply
Shafts can be supplied in standard lengths or cut to the required size for replacement, machine assembly or OEM projects.
Matched Component Support
DLY can supply linear shafts together with linear bearings, shaft supports and supported rail systems.
Custom End Machining Options
For many OEM machines and replacement projects, the shaft needs machining before installation. DLY can process linear shafts according to drawings so that buyers can install them more easily after delivery.
| Machining Type | Typical Purpose |
|---|---|
| Cut-to-Length | Matches the required machine stroke, frame width or replacement shaft length |
| Chamfered Ends | Makes installation easier and reduces edge damage during handling |
| Axial Tapped Holes | Used for end fixing, mounting plates or special installation structures |
| Radial Holes | Used for locking screws, positioning or custom assembly requirements |
| External Threads | Allows the shaft to be fixed with nuts or matched with customer-designed parts |
| Steps, Grooves, Flats and Keyways | Supports positioning, locking, anti-rotation and special machine assembly |
For machined shafts, please send a drawing with total length, machining position, thread size, hole size, tolerance and quantity.
How to Confirm the Right Shaft Before Ordering
To avoid model mismatch or installation problems, buyers should confirm the shaft together with the bearing, support method and installation structure.
| What to Confirm | Why It Matters |
|---|---|
| Shaft diameter and bearing model | The shaft and bearing must match correctly to avoid loose movement or tight sliding |
| Total shaft length and travel distance | Long unsupported shafts may need additional support to reduce deflection |
| Installation method | The shaft may need supports, end fixing, threaded holes or other mounting structures |
| Load and working condition | Higher load, long stroke or frequent movement may require a larger shaft or supported rail system |
| Drawing requirement | Custom machining should be confirmed before production to reduce installation problems |
Compatible Linear Motion Components
DLY can provide precision linear shafts together with matched linear motion components, helping buyers reduce model mismatch and simplify sourcing.
Linear Bearings
Used for smooth sliding movement along the shaft.
Shaft Supports
Used to fix the shaft in machine frames and guide structures.
Supported Linear Rails
Used when longer travel or higher rigidity is required.
Custom Assemblies
Used for OEM linear motion structures and machine modules.
Typical Applications
Precision linear shafts are used in equipment that requires guided straight-line movement, smooth bearing travel and repeatable assembly performance.
- CNC machines and engraving equipment
- 3D printers and small automation devices
- Packaging machinery and transfer systems
- Inspection equipment and positioning mechanisms
- Linear modules and OEM guide assemblies
Why Source Precision Linear Shafts from DLY?
DLY supplies linear shafts as part of a complete linear motion product range, including linear bearings, shaft supports, supported rails, ball screws, linear guideways and linear modules. This helps distributors, machine builders and OEM buyers purchase matched components from one supplier.
For standard shafts, replacement shafts or custom machined shafts, DLY can help check the shaft specification, matching bearing model and drawing requirement before quotation.
Precision Linear Shaft FAQ
Q1: What is a precision linear shaft used for?
It is used as a guide shaft for linear bearings, helping equipment achieve smooth straight-line movement.
Q2: Which tolerance should I choose?
The tolerance should be selected according to the matching linear bearing, housing structure and required fit. If you are not sure, send the bearing model or drawing to DLY for checking.
Q3: Can DLY supply custom length shafts?
Yes. DLY can supply standard lengths and cut-to-length shafts according to customer requirements.
Q4: Can the shaft be machined according to drawings?
Yes. DLY supports drawing-based machining such as holes, threads, steps, grooves, flats and other required processing.
Q5: What information is needed for quotation?
Please provide shaft diameter, length, quantity, material, tolerance grade, surface requirement and machining drawing if needed.
Send Your Precision Linear Shaft Requirement
Please send diameter, length, quantity, material, tolerance grade and drawing if custom machining is required. DLY can help check the suitable production and quotation direction.
WhatsApp: +86 166 0578 8856
Email: dlyexport2@dlybearing.com
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