Belt Driven Internal Grinding Spindles
Precision belt-driven spindles designed for smooth and efficient internal grinding operations.
Achieve unmatched precision in internal bore grinding with Capital Belt Driven Internal Grinding Spindles — expertly engineered for high-speed rotation, ultra-low runout, and long-lasting stability. These high-performance internal grinding spindles are perfect for CNC machines, retrofitting, and special-purpose machines (SPMs) where motorized spindles are not ideal due to space, thermal, or cost constraints.
Applications of Belt Driven Internal Grinding Spindles
Our belt driven spindles are purpose-built for:
- Internal bore grinding in bearings, sleeves, housings, and valve bodies
- CNC Internal Grinding Machines – Studer, Jones & Shipman, Micromatic, and others
- Retrofitting old machines with precision grinding spindle heads
- Custom SPMs for high-speed internal cylindrical grinding
- Tool room and job shop applications requiring repeatable bore accuracy
Trusted by manufacturers in automotive, aerospace, machine tool, and bearing industries.
Technical Specifications – Belt Driven Internal Grinding Spindle
Capital Belt Driven Internal Grinding Spindles are designed for:
- Speed Range: Up to 45,000 RPM (via pulley drive)
- Pulley Configuration: Custom groove or flat belt design
- Power Handling: Dependent on external motor selection
- Runout Accuracy: ≤ 2 microns at the spindle nose
- Bearings: Precision Angular Contact / Ceramic Hybrid Bearings
- Mounting Options: Cartridge type, flange type, or tailstock-supported
We offer spindle sizes ranging from Ø25 mm to Ø150 mm, with shaft extensions and tool holding as per your job requirement.
Why Choose Capital Spindles?
Choose Capital Spindles India Pvt. Ltd. for unmatched quality, durability, and service:
- 30+ Years of Spindle Manufacturing Experience
- Over 2,400 Custom Spindle Models Built
- Manufactured in Delhi with High Precision Grinding & Balancing Facilities
- Balanced on Schenck Machines and Ground on Studer CNC Grinders
- Supplied to Top CNC Retrofits, Machine Builders, and SPM Manufacturers
Every spindle undergoes full performance testing, including dynamic balancing, runout checks, and vibration analysis before dispatch.
Spindle Repair & Rebuild Services
Are you already using belt driven internal grinding spindles and facing issues like vibration, noise, or performance drop? At Capital Spindles, we specialize in providing end-to-end spindle repair and rebuild solutions that restore your spindle to as-good-as-new condition—helping you save significantly on time and cost compared to full replacement.
Our repair and rebuild services include:
- Ceramic and Standard Bearing Replacement – Precision installation of high-quality bearings with correct preload for smooth, long-lasting performance.
- Shaft Taper Grinding & Chrome Coating – Restoring accuracy and surface finish to ensure proper tool holding and minimal runout.
- Balancing Correction & Vibration Diagnosis – Identifying imbalance issues and correcting them with dynamic balancing for stable, low-vibration operation.
- Housing and Sleeve Rework – Precision machining and reconditioning of housings, sleeves, and liners to restore original fits and tolerances.
- Reassembly and Performance Testing – Careful reassembly followed by rigorous testing for speed, vibration, thermal stability, and load capacity.
- Warranty-Backed Repairs with Fast Delivery – Every rebuilt spindle is tested, certified, and covered under warranty for your peace of mind.
By choosing Capital, you not only extend the life of your spindle but also minimize machine downtime, repair costs, and production losses. Our expert team ensures that your spindle returns to peak performance, ready to handle the most demanding grinding applications..
Custom Belt Driven Spindles for CNC & SPM
We design and manufacture custom internal grinding spindles to match your exact machine configuration and application:
- Specific pulley diameter, RPM ratio, and belt groove type
- Customized shaft length, tool holding nose, and grinding wheel adaptors
- Integration support for CNC automation, SPM machine heads, and legacy grinding machines
Partner with us to build OEM-ready spindle solutions — tailored for performance, reliability, and integration.
Get Your Belt Driven Internal Grinding Spindle Today
Optimize your internal grinding operations with precision belt-driven internal 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.