Belt Driven External Grinding Spindles
Belt-driven spindles crafted for accurate, smooth, and dependable external grinding operations.
Experience precision machining with Capital Belt Driven External Grinding Spindles, specially designed for OD grinding, surface grinding, and external cylindrical grinding. Engineered for high-speed, low-vibration performance, these external grinding spindles are ideal for CNC grinders, SPMs, and manual machine retrofits.
With over 30 years of expertise, Capital ensures excellent runout, rigidity, and long-term spindle life — tailored to your exact grinding application.
Applications of External Grinding Spindles
Capital’s belt driven external grinding spindles are used in:
- Cylindrical OD grinding of shafts, mandrels, rollers, and sleeves
- Surface grinding of hardened plates, punches, and tools
- Retrofitting existing grinders with high-performance spindles
- Custom grinding machines (SPMs) for external machining
- Precision tool rooms and bearing manufacturing
Technical Specifications
Our external belt driven grinding spindles are custom-built for precision and performance:
- Speed Range: Up to 30,000 RPM (via belt drive)
- Power Handling: Compatible with external motors (1 HP – 15 HP)
- Pulley Type: Flat or V-groove based on transmission setup
- Runout Accuracy: ≤ 2 microns at the spindle nose
- Bearings: Angular Contact / Ceramic Hybrid Bearings
- Balancing: Dynamically balanced to ISO G0.4 standards
- Mounting: Flange-type, cartridge-type, or custom brackets
We offer shaft diameters, pulley configurations, and taper profiles customized to your application and machine.
Why Capital Belt Driven Spindles?
For over 30 years, Capital has been a trusted name in spindle design and manufacturing, delivering solutions that combine innovation, precision, and reliability. Our belt driven spindles are engineered to meet the demanding needs of modern machining environments, whether for new machine builds or retrofitting older equipment.
Here’s what sets us apart:
- Decades of Expertise – With three decades of engineering excellence, we understand the nuances of spindle performance across industries.
- Precision Grinding on Studer CNC Machines – Every spindle component is finished on Studer high-precision grinders, ensuring exact tolerances and superior surface quality.
- Dynamic Balancing on Schenck Systems – Our spindles are balanced on world-class Schenck balancing machines, reducing vibration and extending bearing life.
- Industrial-Grade Durability – Designed for long-term use in high-volume, continuous production environments, our spindles deliver consistent performance shift after shift.
- Flexible Order Quantities – Whether you need a single spindle or 100+ units, we offer the same precision and quality without minimum order constraints.
- Built for New Builds & Retrofits – Equally suited for OEM machine integration or upgrading older equipment, our spindles provide versatility for varied applications.
- Comprehensive Testing – Before dispatch, every spindle undergoes rigorous speed, vibration, and thermal stability tests, guaranteeing reliability right from installation.
By choosing Capital Belt Driven Spindles, you’re investing in precision-engineered, thoroughly tested solutions designed to maximize productivity, reduce downtime, and deliver long-lasting value.
External Grinding Spindle Repair & Refurbishment
Have an old or underperforming external grinding spindle?
We offer comprehensive spindle repair and rebuild services:
- High-precision bearing replacement and preload setting
- Shaft regrinding, hard chrome coating, and taper polishing
- Dynamic balancing to correct vibration issues
- Pulley rework, housing repairs, and fit tolerance restoration
- QC testing and warranty-backed assembly
Fast turnaround service available across Delhi NCR and major industrial hubs in India.
Custom Spindles for CNC Grinders & OEM Applications
Need a spindle to match your unique grinding setup?
- We offer full custom spindle design and manufacturing, including:
- Spindle nose geometries: BT, MT, ISO tapers, or straight bore
- Pulley specifications: Groove angle, pitch diameter, and keying
- Custom shaft length, bearing selection, and housing design
- Mounting solutions for both manual and CNC grinding machines
Perfect for machine tool OEMs, SPM builders, and automation system integrators
Get Your Belt Driven External Grinding Spindle Today
Enhance your grinding operations with precision belt-driven external grinding spindles. Contact the experts at Capital Spindles India Pvt. Ltd. for spindle repair, custom spindle design, and spindle manufacturing. With our global reach, we deliver high-quality spindle solutions worldwide and are ready to provide a no-obligation quote for your next project.