# Excello Tool Engineering & Manufacturing Company

This MFR.ID profile was supplied, reviewed, and approved by Excello Tool Engineering & Manufacturing Company. Originally approved on 9/10/2025; last updated 4/19/2026. Capability data is manufacturer-approved for public sourcing and RFQ use.

## Profile Links

- Canonical profile: https://mfr.io/excellotool
- JSON data: https://mfr.io/excellotool.json

## Company Overview

Founded in 1960, Excello Tool Engineering & Manufacturing provides close-tolerance CNC milling, turning, and 5-axis milling from a 35,000 sq ft Milford, CT facility. AS9100D and ISO 9001:2015 certified, the shop supports aerospace, medical, automotive, government, and industrial programs with CMM inspection, material and calibration certifications, and DFARS/ITAR flow-down compliance where required.

## Quick Reference

- Processes: CNC Milling, CNC Turning, Tool & Die (Fixtures & Gages), Engineering & Design Services, Inspection & Quality Control
- Lead Time: 5-6 weeks
- Production Scale: Prototype (1-10 parts), Short Run (11-500 parts), Medium Run (501-10000 parts), Mass Production (10001+ parts)
- Location: Milford, Connecticut 06461
- Employees: 11-50
- Revenue: $1M-$5M
- Founded: 1960
- Contact: info@excellotool.com - +1 203-878-4073
- Verified: Manufacturer Approved

## Capabilities

### Precision 3- to 5-Axis CNC Milling

High-mix precision milling on 3-, 4- and 5-axis platforms with palletized cells for rapid changeover and unattended production. One-and-done strategies, in-process probing, and CMM-verified buyoffs drive tight, repeatable results from prototypes through production. Representative cell mix includes Toyoda/Kiwa HMCs and Haas UMC-500/UMC-500SS for complex, multi-face geometries and aggressive takt times.

- Process: CNC Milling
- Highlights: 3-, 4-, and 5-axis milling with palletization (multi-pallet HMC and 10-pallet 5-axis cell), In-process probing with closed-loop work/tool offsets and SPC collection, CMM-backed first-article and final layouts (report formats per contract), Representative fleet: Toyoda FH-class HMC, Kiwa 6-pallet HMC, Haas UMC-500/UMC-500SS, Okuma & Howa VMCs
- Subprocesses: Automated Pallet Machining, In-Process Probing, Face Milling, Surface Milling, Drilling, Horizontal CNC Milling
- Specifications:
  - Surface Finish (Ra, As Machined): Imperial: 16-125 µin - ≤ 32 µin standard on precision faces; ≤ 16 µin achievable with finishing paths/cutters.
  - Lead Times (Milling): 5-6 weeks - Prototype slots 5–10 business days typical; expedited paths available.
  - Tolerances — Best Case Critical Features: 0.0005 in - Feature-dependent (tooling, path, fixturing, environment). Verified via FAI/CMM.
  - Tolerances — Typical Production Features: 0.001 in - Typical profile/size tolerance capability on production features with in-process control.
  - Machining Axes: 3-axis, 4-axis (HMC), 5-axis (UMC/trunnion) - Axis selection based on geometry and tolerance stack to minimize re-clamps.
  - Production Scale: Prototype (1-10 parts), Short Run (11-500 parts), Medium Run (501-10000 parts), Mass Production (10001+ parts) - Sweet spot: high-mix prototypes to medium runs.
  - Workholding: Modular vises, dovetail and zero-point systems, Tombstones/angle plates for HMC multi-face access, Custom fixtures/jigs for datum repeatability - Fixture concepts developed during prototyping to compress future cycle time.
  - Material Compatibility: Stainless steels (300/400 series, 17-4 PH, 15-5), Tool steels (A2, O1, S7), Carbon/alloy steels (1018, 12L14, 4140, 4340), Aluminum (2024, 6061, 7075), Brass/Bronze/Copper, Engineering plastics (Acetal/Delrin, Nylon, PEEK, PC, ABS) - Material certs retained; alternate grades by approval.
  - Spindle/Tooling Capability: 8,000–12,000 rpm class spindles (application-dependent), CAT toolholders with shrink/ER systems, Through-spindle and flood coolant; high-performance semi-synthetic coolants - Tool strategy tuned for alloy, feature reach, and finish requirements.
  - Geometric Controls: True position on multi-face patterns (5-axis re-orientation), Flatness/parallelism on sealing faces, Perpendicularity across orthogonal planes, Profile of a surface for contoured toolpaths - GD&T per ASME Y14.5; control plan scales with risk and lot size.
  - Inspection Strategy: In-process probing for datum verification and tool wear compensation, First-Article Inspection (FAI) on request, CMM layout and capability studies for key characteristics - Report formats: PDF/CSV; ballooned drawings/MBD on request.
  - Work Envelopes (Representative): Haas UMC-500/500SS: ~24 in X × 16 in Y × 16 in Z (5-axis), HMC pallet: ~18 in × 18 in tombstone faces with multi-face access, Okuma & Howa VMC cell: ~20–24 in class travel with 8,000 rpm spindles - Fixture/tombstone height affects usable Z. Confirm part/fixture stack in RFQ.

### Precision CNC Turning & Mill-Turn

Close-tolerance turning with live-tooling, Y-axis and sub-spindle for one-and-done completion. Bar-fed production to ~3.125 in OD with jaw/collet chucking for larger billets. Back-working synchronizes part transfer to finish secondary features in-cycle, delivering concentricity, fine finishes, and compressed lead times on shafts, manifolds, fittings, and threaded components.

- Process: CNC Turning
- Highlights: Mill-turn (Y-axis/sub-spindle) for single-setup completion and datum-locked GD&T, Bar-feed automation to ~3.125 in; larger OD via chucking/soft jaws, Tight concentricity/runout on bearing and seal journals, Representative platforms: Mori/Okuma/Takisawa class lathes with live tools
- Subprocesses: Bar-Fed CNC Turning, Threading, Facing, Hard Turning, Cutoff (Parting), Cross Drilling, CNC Mill-Turn Machining, Single-Setup Part Completion (One-and-Done Mill-Turn)
- Specifications:
  - Maximum Turning Length: 18 in - Between-centers/chucked; sub-spindle back-working reduces re-chucks.
  - Bar Capacity (Through Spindle): 3.125 in - Higher diameters accommodated via saw-cut blanks and chucking.
  - Inspection Strategy: First-piece and periodic checks with SPC on key features, CMM/roundness verification on bearing/seal surfaces, 100% thread and critical-feature gauging on request - Sampling per risk; FAIR/PPAP available.
  - Production Scale: Prototype (1-10 parts), Short Run (11-500 parts), Medium Run (501-10000 parts), Mass Production (10001+ parts) - Sweet spot: repeat bar-work to medium-volume billets.
  - Threading Capability: UNC/UNF/UN (ASME B1.1); UNJ on request, Metric ISO (ASME B1.13M), Pipe threads (NPT/NPTF) by request; GO/NO-GO gauging - Chasing vs. single-point selected by pitch/material and tolerance.
  - Live Tool Milling: Cross/axial drilling and tapping, Milled flats, key-flats and ports, Engraving/marking as specified - Y-axis interpolation for off-center features and radial patterns.
  - Maximum Turning Diameter: 10 in - Representative across lathe bank; confirm per chuck/fixture.
  - Material Compatibility: Stainless steels (300/400 series, 17-4 PH, 15-5), Tool steels (A2, O1, S7), Carbon/alloy steels (1018, 12L14, 4140, 4340), Aluminum (2024, 6061, 7075), Brass / Bronze / Copper, Engineering plastics - Hard-turning on select heat-treated steels supported.
  - Tolerances — Typical Production Features: 0.001 in - Size, roundness and runout held with stable collet/chuck strategies.
  - Surface Finish (Ra, Turned): Imperial: 16-63 µin - ≤ 32 µin on journals using wiper inserts and stable feeds/speeds.
  - Lead Times (Turning): 5-6 weeks - Prototype lots ~5–10 business days; expedite by evaluation.
  - Tolerances — Best Case (Critical Features): 0.0005 in - Critical coaxiality/cylindricity verified via CMM/indicator plans.

### Tooling, Fixtures & Prototyping

Design/build of machining and inspection fixtures, nests and gauges, plus rapid prototype machining to validate form-fit-function before release. Toolroom mills, engine lathes, surface grinders, and CMM buyoffs produce rigid, datum-reliable tooling that reduces setup time, improves repeatability, and de-risks ramp to production.

- Process: Tool & Die (Fixtures & Gages)
- Highlights: CMM-verified fixture/gauge buyoffs with defined datum schemes, Bridgeport/toolroom support and surface grinding for precision faces, Concurrent fixture design during prototyping to cut future cycle time, Documentation deliverables: setup sheets, clamp points, pin maps, gage lists
- Subprocesses: Fixture & Gauge Manufacture, Prototype Tooling Design & Build, Production Tooling & Fixture Design
- Specifications:
  - Finish & Surface Prep (Tooling): Ground reference faces on locators and nests, Deburr/vapor-blast for handling safety, Black oxide or rust-inhibitor on tool steels (as required) - Prevents damage to workpieces and maintains long-term accuracy.
  - Tool/Gauge Materials: A2, O1, 4140, 17-4 PH - Material choice balances wear, corrosion, and weight.
  - CMM Buyoff Scope: Verification of datums (A/B/C) and locator geometry, Hole patterns/true position checks on master part, Profile/flatness checks of critical seating faces - Ballooned print or CAD-to-part report delivered on request.
  - Documentation Package: Setup sheet with clamp points and datum scheme, Tool/gage list with maintenance intervals, Pin maps and exploded views (where applicable) - Ensures repeatable setups and simplified maintenance.
  - Datum Repeatability (Clamp To Datum): 0.0005 in - Achievable on properly designed nests with hardened locators.
  - Bushings & Wear Items: Press-fit and renewable drill bushings (as required), Hardened wear plates at clamp points, Replaceable locating pins/liners - Wear items specified in BOM with part numbers for serviceability.
  - Processes Utilized: CNC machining of tool components, Manual Bridgeport milling and engine lathe ops, Surface grinding for flatness/finish on critical faces - Production-representative tooling ensures process continuity.
  - Prototype Turnaround: 5-6 weeks - Simple nests/jigs often within 1 week; complex multi-op fixtures vary.
  - Mounting Interfaces: VMC T-slot tables with clamp kits and locating keys, HMC tombstones/angle plates for multi-face access, Zero-point/dovetail baseplates for quick changeover - Interface selected to match target machine family and rigidity needs.
  - Maintenance & Spares: Spare pins/bushings and wear plates listed in BOM, Preventive grind/stone intervals for critical faces, Lubrication and anti-corrosion procedures - Preserves long-term datum integrity and availability.
  - Fixture Envelope (Max): 36L x 20W x 16H in - Larger bases possible in modular sections; confirm bolt pattern.
  - Locating & Clamping Elements: Hardened dowel pins (diamond/round pair), V-blocks / nest contours for irregular profiles, Toggle/cam/screw clamps and stop blocks - Designed to maintain datum integrity while enabling safe, fast loading.
  - Calibration & Verification: Gage blocks/pin gages for quick checks, Master part or certified artifact for periodic verification, Gage R&R entry added to calibration schedule (as required) - Maintains traceability and verifies long-term fixture performance.

### Engineering & DFM Support

Pragmatic engineering support focused on CAD intake, DFM, and CNC programming. Translates/validates customer CAD, reviews GD&T and tolerance/cost tradeoffs, and produces collision-checked toolpaths and machine-specific posts. Delivers clean setup documentation and fixture concepts to shorten iteration and hand off cleanly to production.

- Process: Engineering & Design Services
- Highlights: DFM/DFA guidance tied to tool access, datum schemes, and setup count, CAD translation/validation; clean geometry handoff to CAM, Shop-ready NC posts for Haas/Fanuc controls, Complete setup docs (tool lists, offsets, clamp points, inspection callouts)
- Subprocesses: DFM / DFA Consulting, CNC Programming & Post-Processing Services, CAD Model Import & Translation, CAD File Conversion
- Specifications:
  - Programming Deliverables: NC program and machine-specific post, Tool list with stick-out and holder notes, Work offsets/probing routine references, Setup sheet with clamp points and datum strategy - Package tailored to target machine family and part risk profile.
  - CAD Formats Supported: STEP (.stp/.step), IGES (.igs/.iges), Parasolid (.x_t/.x_b), SolidWorks, DWG/DXF, PDF - Native-version compatibility confirmed at intake; geometry healing performed as needed.
  - Axis Count Supported: 3-axis, 4-axis, 5-axis - Includes probing cycles and in-process inspection macros where appropriate.
  - Simulation & Verification: Backplot/verification of toolpaths, Clearance checks for holder/fixture collisions, Machine-side prove-out notes (single-block, feed-hold checkpoints) - Reduces first-article risk and accelerates safe prove-out.
  - Units & Conventions: Inches, Millimeters - Supports both inch and metric units; set per customer package.
  - Fixture Concepts (Engineering Handoff): Zero-point/dovetail references for quick change, 3-2-1 datum plan with clamp/stop layout, Notes on soft jaw geometry or nest contours - Concepts guide production fixture build; detailed fixture design handled in Tooling capability.
  - Revision Control & File Exchange: Controlled filenames with revision tags, Change log summarizing path/fixture updates, Secure file transfer on request (share link or customer portal) - Prevents stale data and aligns shop floor with latest revision.
  - DFM/DFA Review Scope: Tool reach/holder clearance; minimum tool diameter recommendations, Setup-count reduction via datum plan and operation grouping, Tolerance vs. cost guidance (tighten only where functionally necessary), Material/process alternatives when beneficial for schedule or cost - Actionable comments returned with quote or programming package.
  - DFM Review Turnaround: 5-5 days - Assumes complete drawing/CAD package and defined critical characteristics.
  - Tooling & Holders (Programming Assumptions): CAT holders (ER collet and shrink-fit considered by reach/rigidity), Minimum stick-out specified per operation to control chatter, Tool libraries provided with diameter/length offsets and cutter comp strategy - Holder choice and stick-out called out on setup sheet to ensure replication.
  - Drawing & GD&T Standards: ASME Y14.5 GD&T interpretation, Title-block/general tolerance adherence, Explicit datum scheme confirmation (A/B/C) prior to programming - Ambiguities clarified before CAM to prevent rework.
  - CAM/Post Targets: Haas, Fanuc - Machine travels/kinematics and work offsets validated to avoid over-travel and collisions.
  - Programming Turnaround: 5-5 days - Complex MBD or multi-setup parts may extend; schedule confirmed at quote.

### Inspection & Quality Control

ISO-aligned quality system with in-process checks and final inspection. Capabilities include CMM layouts, optical/vision checks, surface metrology, and gauge calibration with traceable records. First-article and PPAP data packs are produced on request; inspectors support incoming, in-process, and final scopes under controlled conditions.

- Process: Inspection & Quality Control
- Highlights: Bridge-style CMM measurement with print-driven routines (no CAD-driven CMM), Optical/vision inspection and surface metrology (Ra/Rz), FAI (AS9102) and PPAP deliverables available on request, Traceable gauge calibration program with Gage R&R
- Subprocesses: Dimensional Inspection, 3D Coordinate Measurement, Gauge Calibration & Gage R&R Management, PPAP Documentation & Submission
- Specifications:
  - Environmental Conditions: 72 °F inspection conditions (24/7), Humidity control per instrument specification - Thermal stabilization time observed before measurement of tight-tolerance parts.
  - Serialization & Traceability: Lot/heat traceability on material certs matched to inspection records, Part/lot serialization linked to data packs (barcoding/marking per contract), Retention of inspection records and certs per contract (default available on request) - Ensures forward/backward traceability from shipment to raw material.
  - Inspection Scope: Incoming, In-process, Final - Scope tailored per drawing/contract and part criticality.
  - Inspection Equipment (Representative): Bridge CMM with interchangeable probe styli, Optical comparator / digital microscope, Micrometers, calipers, bore/ID gauges, pin gauges, Height gauges, granite surface plates, sine/angle blocks, Thread plug/ring gauges; gauge blocks and standards, Surface finish tester (profilometer) for Ra/Rz - Calibrated instruments only; fixturing used to stabilize parts as needed.
  - Packaging & Preservation Checks: Cleanliness and FOD checks prior to bagging/boxing, Rust inhibitor or VCI application for ferrous parts (as specified), Protective separators or trays to prevent handling damage - Packaging validated against customer spec (e.g., ASTM/MIL standards if required).
  - GD&T Controls Verified: Size and location (true position, concentricity), Form (flatness, straightness, circularity, cylindricity), Orientation (perpendicularity, parallelism, angularity), Profile (profile of a line/surface) per ASME Y14.5 - Characteristic set defined by the ballooned print or MBD/PMI.
  - Calibration & MSA: Gauge recall schedule with unique ID and calibration records, External calibration with NIST traceability (ISO/IEC 17025 providers as needed), MSA studies (Gage R&R/bias/linearity/stability) on critical gauges - MSA acceptance criteria defined by customer or internal quality plan.
  - Modalities: CMM (touch probing; print-driven only), Vision imaging inspection, Optical comparator / vision inspection, Surface roughness measurement (Ra/Rz) - Modalities selected to match feature type, tolerance, and risk.
  - Standards & Reporting: ASME Y14.5 GD&T interpretation, AS9102 First Article Inspection (on request), Automotive PPAP (on request, Levels 1–5), NIST-traceable calibration (external labs ISO/IEC 17025 as required), Digital data packs (PDF/CSV); ballooned drawings or MBD on request; QIF referenced (not currently used) - Report formats and level of evidence per contract or customer quality plan.
  - FAI/Data Pack Lead Time: 5-5 days - Assumes defined characteristics and part availability; complex FAIRs may extend.
  - Sampling Plans & Acceptance: First-piece verification at setup with periodic checks, Lot-based sampling per ANSI/ASQ Z1.4 or C=0 (by agreement), 100% inspection on critical features or special characteristics - Sampling tightened for higher risk/features with history of variation.
  - Incoming Material & Supplier Docs: Review/retention of mill certs and supplier CoCs, Verification of heat/lot numbers against PO and drawing, PMI/HT verification available via certified partners, as required - Special processes (plating/HT) verified by vendor certs and receiving inspection.

## Certifications

- ISO 9001:2015 (Type: Certification; Authority: International Organization for Standardization (ISO); Status: Active; Scope: Quality Management System certified to ISO 9001:2015 for a single-site precision machining operation; certificate 263246 issued by Amtivo (USA) Inc.; Issue date: 2024-12-21; Expiration date: 2026-12-22; URL: https://www.iso.org/iso-9001-quality-management.html)
- AS9100D (Type: Certification; Authority: International Aerospace Quality Group (IAQG); Status: Active; Scope: Management system certified to AS9100D and ISO 9001:2015 for a single-site operation; provider of precision machining services for aerospace, medical, commercial applications, specializing in CNC milling & turning of close-tolerance components and assemblies.; Issue date: 2024-12-01; URL: https://www.sae.org/standards/content/as9100d/)

## Industries Served

- Aerospace & Defense: AS9100-scoped precision machined components, housings, and fixtures with FAIR documentation on request (AS9102) and DFARS/ITAR flow-down compliance where specified.
- Medical Devices & Healthcare Equipment: Tight-tolerance machined components, instrument bodies, and subassemblies with material certification and lot traceability suitable for regulated medical builds.
- Automotive & Transportation: Prototype-to-production machined parts, brackets, and powertrain components with PPAP-ready inspection data and repeatable short-run delivery.

## Facilities

### Excello Tool Engineering & Manufacturing Co. Headquarters

Primary headquarters with ~35,000 sq ft of manufacturing floor space housing CNC milling, multi-axis machining centers, CNC lathes, grinders, presses, and a dedicated inspection/CMM department. The facility supports precision, close-tolerance production, prototyping, and JIT deliveries with documented calibration and material certification processes to support regulated supply chains.

- Type: manufacturing_facility
- Headquarters: Yes
- Email: info@excellotool.com
- Phone: +1 203-878-4073
- Address: 37 Warfield Street, Milford, Connecticut 06461, United States

## Verification Status

- Business Entity: Verified 8/15/2025
- Technical Capabilities: Verified 9/10/2025
- Locations & Facilities: Verified 8/15/2025
- Reviews & Ratings: Not yet verified
- MFR.ID Created: 8/15/2025
- Last Updated: 4/19/2026