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Internal Grinding Spindles
At Spindle Experts, our Internal Grinding Spindles are designed to perform precise and consistent bore grinding operations in a wide variety of materials. Ideal for both CNC and conventional grinding machines, these spindles offer high RPM, low runout, and long service life, making them perfect for ID grinding tasks in automotive, aerospace, and engineering sectors.
Though compact in size, these spindles are engineered for high power transmission via external drive systems — ensuring flexibility in speed control and torque, especially for deep bores and delicate finishes.
Technical Specifications
Parameter Specification
RPM Range 12,000– 45,000 RPM
Tool Holding Collet (ER, MT), Mandrel, Flange
Bearings Hybrid Ceramic / Angular Contact
Cooling Air-Cooled / Oil Mist Optional
Runout Accuracy ≤ 0.002 mm
Mounting Foot / Flange / Custom Base
Body Material Hardened Steel / Aluminum
Drive Via precision external belt (Flat / Poly-V type)
Applications
Internal bore finishing
Blind hole grinding
Bearing seat machining
Gear housing grinding
Retrofitting manual grinding setups
Why Choose Our Internal Grinding Spindles?
Compact, slim design for internal operations
High RPM capability with excellent runout accuracy
Easy integration in new and existing machines
Customizable mounting and spindle length
Long bearing life with minimal maintenance
Trusted by toolrooms, OEMs, and CNC retro-fitters
Vibration sensors
Temperature control systems
Custom shaft extensions
Enhanced balancing for ultra-precision
Coolant delivery ports