About REGO-FIX
REGO-FIX Precision Rotary Toolholding Systems
REGO-FIX is a Swiss-based leader in precision rotary toolholding, renowned for ER collet technology, advanced clamping systems, and microtooling solutions. Founded in 1957 and headquartered in Zurich, REGO-FIX introduced the revolutionary ER collet system in 1972, which became the worldwide industry standard for flexible, repeatable, precision tool clamping in milling, drilling, tapping, and grinding applications across aerospace, automotive, and medical device manufacturing.
The ER Collet System is REGO-FIX's cornerstone product, available in sizes ER8 through ER50 (accommodating tool shanks from 0.2mm to 36mm diameter) manufactured to ISO 15488 (formerly DIN 6499-B) standards. All ER collets achieve <10 micron runout (TIR) at 3×D (three times tool diameter) in standard variants and ultra-precision <5 micron runout versions, ensuring consistent part accuracy across high-volume production runs. REGO-FIX offers sealed collets for high-pressure coolant-through machining, stainless-steel interior finishes for corrosion resistance, and precision-balanced versions rated for spindle speeds up to 30,000 RPM.
The powRgrip System combines high-speed milling capability with reliable performance through a spring-collet design optimized for heavy cutting forces and thermal stability. A unique REGO-FIX innovation, powRgrip expands tool holding beyond traditional ER collets into high-torque, high-speed regimes common in modern 5-axis machining and rapid prototyping centers. The system accepts both standard ER tool shanks and proprietary powRgrip cartridges for specialized applications.
REGO-FIX's micRun Toolholding System serves precision micromachining (electronics assembly, micro-drilling, fine-pitch tapping) with runout accuracy approaching 2–3 microns and tool shank sizes from 0.2mm to 3.0mm. Every collet is manufactured in Switzerland under rigorous ISO quality controls and individually tested before shipment. REGO-FIX also supplies complete tooling kits with collets, reduction sleeves, pull studs, and cleaning tools, enabling immediate deployment without auxiliary sourcing.
ChatMRO accelerates REGO-FIX procurement: specify your spindle type (ISO ER pull, BT, DIN), tool shank size, required runout accuracy (standard 10µm vs. ultra-precision 5µm), and spindle speed (up to 30,000 RPM), and ChatMRO instantly retrieves the matching ER collet, powRgrip, or micRun system from 30M+ indexed tooling inventory — complete with balancing certificates, concentricity test reports, and full accessory cross-references — ensuring optimal setup and minimal spindle downtime.
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Frequently asked questions
What does ISO 15488 (DIN 6499-B) runout specification mean, and why is <5µm runout important?
ISO 15488 defines Total Indicated Runout (TIR) — the maximum radial deflection of the collet bore during one full spindle rotation when a tool is clamped. Standard ER collets achieve <10µm TIR; ultra-precision variants <5µm. Lower runout ensures consistent hole diameter, tighter surface finish, and longer tool life; in aerospace or medical component manufacturing, <5µm runout is essential for holding ±0.0002" tolerance holes and fine-pitched threads across multiple parts.
How do I select the correct ER collet size for my spindle and tool shank?
ER collet sizes (ER8, ER16, ER20, ER32, ER50) correspond to collet bore diameter and shank capacity: ER16 accommodates round shanks from 1/8" to 5/8" with slight clamping range overlap, while ER32 handles 1/2" to 1-1/4" shanks. Always match your spindle's pull-stud taper (ISO ER, BT, DIN) to the collet's stem; using an undersized collet (too small) causes insufficient clamping force, while oversized collets jam and risk spindle damage.
What is the difference between standard and sealed REGO-FIX collets?
Sealed collets feature internal O-rings or labyrinth design that prevent coolant ingress into the spindle taper while still allowing coolant flow through the hollow tool shank — essential for flood coolant or high-pressure air-mist systems. Standard collets are open and cannot withstand sustained coolant spray; they're suitable for dry machining or light mist cooling only. If coolant-through capability is critical, specify 'sealed' REGO-FIX collets.
Can I use REGO-FIX collets in spindles other than ISO ER pull-stud designs?
REGO-FIX ER collets are ISO standard and fit any spindle with an ISO ER taper pull-stud (e.g., most CNC mills, precision boring mills, grinders). Spindles with different tapers (BT ISO taper, DIN tapers, etc.) require different collet stems — REGO-FIX supplies reduction sleeves and pull-stud adapters for limited cross-compatibility, but always confirm your spindle's exact taper designation before ordering to avoid incompatible components.
How do I maintain REGO-FIX collets and prevent runout degradation over time?
Keep collets clean and dry after each use; REGO-FIX supplies collet-cleaning tools and storage cases to prevent dust/coolant buildup inside the bore. Periodically inspect collets for galling (tiny scratches) or damaged spring leaves — minor scoring is normal, but deep gouges require replacement. If runout increases over time or a tool slips during clamping, the collet may be worn; REGO-FIX offers reconditioning services and replacement collets to restore spindle accuracy without re-tooling the entire machine.