Durable construction for long service life: made from durable materials to withstand repeated clamping and speed use, reducing downtime and replacement costs. Precision performance: compatible with all ER16 collets and engineered for low chuck runout (TIR) of .0003', delivering accurate concentricity for smalldiameter tooling. Fits TTS 3/4' straight shank: designed specifically for TTS 3/4' straight shank holders to ensure a secure, repeatable fit. Wide clamping range: accepts tooling from 3/16' to 1/2', so a single chuck covers a broad range of end mills, drills, and routers. Balanced for speed operation: dynamically balanced to operate up to 12,000 RPM without compromising stability, reducing vibration and improving surface finish. Easy setup and reliable grip: straightforward installation and consistent clamping force help prevent slippage and extend tool life. Key benefits — why you need it Improves accuracy: the low TIR and ER16 compatibility reduce runoutrelated errors, so small cutters and drills cut truer and last longer. Simplifies inventory: the 3/16'–1/2' clamping range covers many common tool sizes, so you need fewer chucks and collets on hand. Increases throughput: balanced construction and allowable RPM let you run faster feeds and spindle speeds with confidence, improving cycle times without sacrificing quality. Reduces rework and rejects: stable clamping and reduced vibration lead to cleaner cuts and fewer part defects. Features at a glance Compatibility: fits all ER16 collets; designed for TTS 3/4' straight shank holders Clamping range: 3/16' (0.1875') to 1/2' (0.500') Runout (TIR): .0003' Maximum speed: up to 12,000 RPM Construction: durable materials for longlasting use Practical applications CNC milling of small components: ideal for precision end mills used in mold, die, and miniature part production where concentricity and low runout are critical. speed engraving and routing: balanced design supports spindle speeds for engraving, PCB routing, and fine woodworking tasks with improved surface finish. Precision drilling and reaming: use for smalldiameter drills and reamers in fixture work or prototype machining where accurate hole location and size are required. What makes this product stand out Combines ER16 versatility with a wide 3/16'–1/2' clamping range and a TTS 3/4' straight shank fit, delivering a practical, precise solution for many smalltool applications. Low runout and dynamic balancing provide measurable improvements in cut quality and tool life without complex setup changes. Specifications (concise) Fit: TTS 3/4' straight shank Collet compatibility: ER16 Clamping range: 3/16' to 1/2' TIR: .0003' Max speed: 12,000 RPM Material: durable materials for longlasting use If you need consistent accuracy, fewer tool changes, and reliable speed performance for small tooling, this chuck provides a simple, effective solution.