Linear Motion & Actuation
Linear guides, linear bearings and shafts, ball and lead screws, electric linear actuators, rack and pinion drives and linear modules.
Linear Motion Systems & Industrial Actuators
Engineering-led discovery, selection, sourcing and replacement support for linear guides, screw drives, actuators and positioning axes - for industrial OEMs and maintenance teams.
Linear Guides & Rail Systems
Profiled rail guides with ball or roller carriages for precise, rigid linear guidance.
View →Linear Bearings & Precision Shafts
Linear bushings and hardened precision shafts for round-shaft guidance.
View →Ball Screws & Lead Screws
Ball screws and lead (trapezoidal) screws that convert rotation into linear motion.
View →Electric Linear Actuators & Cylinders
Motor-driven linear actuators and electromechanical cylinders for controlled thrust and positioning.
View →Rack & Pinion Linear Drives
Rack and pinion drive systems for long travel and high thrust.
View →Linear Modules & Multi-Axis Systems
Ready-to-install linear modules and gantry / XYZ positioning systems.
View →Special Linear Motion Components
Ball splines, crossed-roller guides, telescopic slides and other special components.
View →Reference Product Families
THK
Reference families: LM Guides, ball screws, ball splines, linear bushings and actuators.
Request a Quote →Bosch Rexroth
Reference families: ball and roller rail systems, screw assemblies, compact modules and electromechanical cylinders.
Request a Quote →What is a linear guide?
A linear guide enables a load to translate along a defined axis while resisting forces and moments. Profiled-rail guides use rolling balls or rollers between a rail and carriage; round-shaft systems use bushings on hardened shafts. The guide constrains motion but does not by itself propel the axis.
How do linear motion drives work?
Ball screws convert rotation into axial motion through recirculating rolling elements. Lead screws use sliding-thread contact. Belt-driven axes translate a carriage using a belt; rack-and-pinion drives use tooth engagement for long travel. Electromechanical cylinders use motor-driven screw mechanisms to deliver axial thrust. Each option has different stiffness, backlash, efficiency and safety characteristics.
Product Families
- Profiled rail guides (ball and roller)
- Round-shaft guides and linear bushings
- Ball, lead / trapezoidal and specialist roller screws
- Electric linear actuators and electromechanical cylinders
- Rack-and-pinion linear drives
- Linear modules, gantry / XYZ positioning systems
- Ball splines, crossed-roller guides and telescopic slides
Engineering Selection Method
Define stroke, axis orientation, speed, acceleration, repeatability, duty cycle, applied load, moments, shock and environment. Select the guidance architecture; validate static / dynamic ratings, life, preload and lubrication using the manufacturer catalogue. For screw drives check lead, efficiency, critical speed, buckling, support bearings and motor torque. For powered axes verify encoder, limit switches, brakes and controls. Obtain dimensional drawings and approval before procurement.
Basic Engineering Checks
Ideal screw travel speed: v = p × n, where p is the lead in mm/rev and n the screw speed in rpm; v is in mm/min. Use the actual speed after gearing. Motor torque must account for thrust, efficiency, acceleration and losses. Guide pitch / yaw / roll moment ratings, screw buckling, thermal growth and vibration require separate validation.
Replacement & Interchange
Compare mounting envelope, hole pattern, rail / carriage geometry, screw diameter / lead, nut flange, end machining, shaft fits, static / dynamic load ratings, moment capacity, stiffness, preload, accuracy, backlash, friction, speed, life, lubrication, seals, motor and control interfaces, and environmental suitability.
| Class | Meaning |
|---|---|
| Direct Interchange | Fully validated replacement |
| Dimensionally Compatible | Fit only - performance to be checked |
| Functionally Equivalent | Engineering modifications may be needed |
| Engineering Review Required | Insufficient data - review before approval |
Applications & Industries
- Mining / material handling: diverters, gates and positioning equipment.
- Steel / cement: machinery, inspection and handling automation.
- Petrochemical / oil & gas: qualified packaged positioning systems, with separate hazardous-area assessment for electrical equipment.
- Water / wastewater: gate and valve positioning with corrosion review.
- OEM automation: packaging, machine tools, robotics, test stands and assembly systems.
RFQ / Engineering Data
Company, application / machine, original manufacturer / model, photos / nameplate, quantity, axis layout, load / moments, stroke, speed, acceleration, duty, positioning accuracy, environment, mounting dimensions, drawings, lubrication, motor / controls, preferred replacement class, delivery location and engineering contact.
THK and Bosch Rexroth are named as reference product families only; no authorization, availability or interchange is implied. Validate all performance data against current series-level documentation.
Leading Manufacturers Worldwide
Well-known European, American and Asian (Japanese and Korean) manufacturers of linear motion & actuation.
| Manufacturer | Country | Product focus |
|---|---|---|
| Bosch Rexroth | Germany | Rail systems, screw assemblies, linear modules, electromechanical cylinders |
| Schaeffler (FAG, INA) | Germany | Rolling bearings and linear guides |
| Ewellix (former SKF Motion Technologies) | Sweden | Linear actuators, ball and roller screws, linear guides |
| SCHNEEBERGER | Switzerland | Profiled rail guides, crossed-roller guides |
| Thomson Industries | USA | Linear bearings, ball screws, linear actuators |
| PBC Linear | USA | Linear bearings, guides and actuators |
| THK | Japan | LM Guides, ball screws, ball splines, actuators |
| NSK | Japan | Rolling bearings and linear motion |
| IKO (Nippon Thompson) | Japan | Linear guides, crossed-roller guides, needle bearings |
| Samick Precision (SAMICK THK) | Korea | Linear bushings and linear guides |
Listed for market information only. Brand names belong to their owners; their mention does not imply that MECHATRIC represents, distributes for or is authorized by these manufacturers. Product availability and equivalents are confirmed per enquiry.
Need a linear motion solution?
Send the application data, original manufacturer / model or drawings - MECHATRIC reviews the selection or replacement and prepares the RFQ.
Frequently Asked Questions
Guide vs actuator?
A guide supports and constrains travel; an actuator drives travel.
Ball screw vs lead screw?
Compare lead, envelope, efficiency, back-driving and holding safety.
Ball-rail vs roller-rail guide?
Verify geometry, load / moment ratings, stiffness, preload and life.
Can one guide block be replaced?
Follow the manufacturer matching and preload instructions.
Belt-driven vs screw-driven axis?
Compare stroke, speed, thrust, precision, stiffness and duty.