Part Types

Every part type we source and manufacture

The full part-type library from MTD Manufacturing’s capabilities gathered in one place for quick reference. Every part type listed is APQP/PPAP capable and quality-managed by the same team across 32 countries.

Capabilities

One partner, every process

Castings, machined parts, fasteners, gears, injection molded plastics, and assemblies – sourced, quoted, and quality-managed by the same team.

01 / CASTINGS

Castings

Sand, investment, permanent mold & die cast, dimensionally verified before they ship.

02 / CASTINGS

Sand Casting

Traditional sand-mold casting for mid-to-large iron and aluminum components.

03 / CASTINGS

Gravity Casting

Gravity-fed permanent mold casting for dimensionally precise aluminum housings.

04 / CASTINGS

Lost Wax Casting

Investment casting for complex geometries and fine surface detail.

05 / CASTINGS

High Pressure Die Casting

High-volume die casting for tight-tolerance, thin-wall parts.

06 / MACHINING

Machined Parts

CNC turning, milling, multi-axis machining to print, with CMM inspection.

07 / MACHINING

Swiss, Lathe & Grinding of Shafts

High precision Swiss turning, lathe work, and shaft grinding to tight diameter tolerances.

08 / FASTENERS

Fasteners & Hardware

Standard and custom fasteners, VMI-managed for line-side replenishment.

09 / GEARS

Gears & Power Transmission

Spur, helical, bevel gearing and complete gearbox/powertrain assemblies, sourced to AGMA tolerance classes.

10 / MOLDING

Plastic Injection Molding

Tooling and production sourcing for engineered resins, sample to validated production.

Additional Capabilities

Beyond the core process list

A few more places our sourcing and manufacturing base shows up — automotive hardware, precision defense components, and medical-grade parts.

Seat Tracks

01 / SEAT TRACKS

Seat Track Hardware (2-Way & 4-Way)

Rail, hardware, and fastener kits for 2-way and 4-way automotive seat track assemblies.

02 / SEAT TRACKS

Seat Track Assemblies

Fully assembled seat track and steering column components, ready for install.

Self-Defense & Firearm Components

01 / SELF-DEFENSE

Firearm & Self-Defense Components

Machined firearm components alongside self-defense hardware — slides, triggers, grips, and EDC parts.

Medical & Orthopedic

01 / MEDICAL

Orthopedic Surgical Instruments

Precision surgical instrumentation for orthopedic procedures, machined to tight tolerance.

02 / MEDICAL

Orthopedic Trials (Plastic Parts)

Sized trial components in medical-grade plastics, surgeon-trusted and consistently manufactured.

03 / MEDICAL

Orthopedic Knee & Round Broaches

Precision-manufactured knee and round broaches to medical-grade specification.

Sourcing White-Glove Support

India — Metals

MTD Manufacturing’s India network is built around metals: castings, forgings, and machined metal components, with in-country oversight from RFQ through shipment from our Pune office. This is where a large share of our castings and machined-parts sourcing runs.

Mechanical Engineers

#2 Worldwide

By total graduates/pool size

Metals / Metal-Goods Exports

Top 10

Global export rank

Favorability Toward USA

Favorable

Directionally positive, trade partner

Currency Trend (INR/USD)

Gradual Depreciation

Long-run trend vs USD
Sand & investment castings CNC machining Fasteners

Figures above are directional placeholders — confirm against current sourcing/econ data before publishing.

China — Electrical

Deep supplier relationships across electrical and electronic component manufacturing, with quality control processes built for assemblies that combine mechanical and electrical parts.

Mechanical Engineers

#1 Worldwide

By total graduates/pool size

Metals / Metal-Goods Exports

#1 Global

Global export rank

Favorability Toward USA

Mixed

Directionally positive, trade partner

Currency Trend (INR/USD)

Managed / Stable

Long-run trend vs USD
Electrical components Assemblies Injection molded housings

Figures above are directional placeholders — confirm against current sourcing/econ data before publishing.

Taiwan — Precision & Electronics

Precision machining and electronics-adjacent manufacturing with tight tolerance capability, supporting programs that need high-accuracy metal components alongside electronic sub-assemblies.

Mechanical Engineers

High Density

By total graduates/pool size

Metals / Metal-Goods Exports

Top 15

Global export rank

Favorability Toward USA

Highly Favorable

Directionally positive, trade partner

Currency Trend (INR/USD)

Relatively Stable

Long-run trend vs USD
Precision CNC machining Electronic sub-assemblies Tight-tolerance parts

Figures above are directional placeholders — confirm against current sourcing/econ data before publishing.

Indonesia / Malaysia — Medical

Medical-grade component and device sourcing, with the documentation and quality-system rigor that medical programs require from first article through production.

Mechanical Engineers

Mid-Tier

By total graduates/pool size

Metals / Metal-Goods Exports

Top 30

Global export rank

Favorability Toward USA

Favorable

Directionally positive, trade partner

Currency Trend (INR/USD)

Mixed

Long-run trend vs USD
Medical components Regulated quality systems

Figures above are directional placeholders — confirm against current sourcing/econ data before publishing.

Indonesia / Malaysia — Medical

Medical-grade component and device sourcing, with the documentation and quality-system rigor that medical programs require from first article through production.

Mechanical Engineers

Growing Pool

By total graduates/pool size

Metals / Metal-Goods Exports

Top 40

Global export rank

Favorability Toward USA

Favorable

Directionally positive, trade partner

Currency Trend (INR/USD)

Relatively Stable

Long-run trend vs USD
PrecisionTextiles Electrical assemblies

Figures above are directional placeholders — confirm against current sourcing/econ data before publishing.

Quality by Part Type

What Documentation MTD Delivers With Each Part Type

MTD Manufacturing manages APQP/PPAP documentation for offshore suppliers across all part types. The specific deliverables vary by process and program requirements, here is what comes standard versus what is added for specialized programs.

Castings - All Types

Standard Quality Package

  • First-article dimensional layout – CMM-verified against print
  • Material certification – mill cert with heat number
  • Visual inspection report – surface defect, porosity check
  • APQP/PPAP submission – managed by MTD for offshore suppliers
  • Dimensional control plan – critical characteristic tracking
  • Process capability (Cpk) – available on request for critical dims

CNC Machined Parts

Standard Quality Package

  • CMM inspection report – to print, first-article and in-process
  • Material certification – CoC with chemistry and mechanical props
  • Surface finish report – Ra verification on specified surfaces
  • Thread gauge report – go/no-go on threaded features
  • PPAP Level 3 – full submission package available
  • Cpk studies – on critical features, available on request

Fasteners & Hardware

Standard Quality Package

  • Certificate of conformance – per shipment
  • Material certification – grade, chemistry, mechanical props
  • Torque/tensile test reports – available on request
  • Plating/coating certification – finish type and thickness
  • Lot traceability – batch number per shipment

Gears & Power Transmission

Standard Quality Package

  • AGMA class verification – per tooth profile, pitch, and runout
  • Material certification – alloy grade, heat treat record
  • Hardness test report – surface and core hardness verification
  • CMM dimensional report – key gear geometry dimensions
  • PPAP documentation – managed by MTD for offshore suppliers

Medical & Orthopedic

Enhanced Quality Package

  • Serialized lot traceability – raw material heat to finished part
  • ISO 13485-aligned QMS – supplier quality system verification
  • CMM inspection report – 100% critical feature inspection
  • Material certification – medical-grade: 316L SS, Ti-6Al-4V, UHMWPE, PEEK
  • Biological/biocompatibility documentation – available per program
  • Sterilization compatibility report – available per program

Firearm & Defense

Standard Quality Package

  • Material certification – alloy grade and chemistry
  • CMM dimensional inspection – all critical features
  • Lot traceability – serialized lot from raw material
  • Surface treatment certification – anodize, Parkerizing, coating
  • Functional test report – available per program

Part Types - FAQ

Common Questions About Process Selection & Part Types

What is the difference between sand casting, investment casting, and die casting?

Sand casting uses a sand mold that is broken after each pour – best for large, complex-geometry iron and aluminum parts at low-to-mid volumes (CT8–CT10 tolerance, ±0.030″–0.060″). Investment (lost wax) casting uses a wax pattern encased in ceramic – best for complex geometries needing fine surface detail and tighter tolerances (CT4–CT6, ±0.005″–0.015″), common in medical, aerospace, and defense. High-pressure die casting (HPDC) forces molten metal into a steel die under pressure best for high-volume thin-wall aluminum and zinc parts (CT5–CT7, ±0.003″–0.010″), common in automotive OEM programs.

Use CNC machining when: tolerances are tighter than casting can achieve (±0.001″–0.005″ range), volume is too low to amortize casting tooling, geometry is simple enough to machine efficiently from bar or billet, or the part needs material properties better achieved in wrought form than cast. Use casting when: the part has complex internal geometry, volume is high enough to amortize tooling, and near-net shape saves machining cost. For most programs, the right answer is cast-plus-machine: MTD Manufacturing structures integrated programs where casting and machining are managed by a single supplier.

MTD Manufacturing sources spur, helical, bevel, and worm gears to AGMA tolerance classes 5 through 12, depending on application speed, load, and noise requirements. Class 5–7 covers general industrial applications; Class 9–12 covers precision aerospace and high-speed gearing. Heat treatment (carburizing, through-hardening, induction hardening) and surface finish (ground vs. hobbed vs. shaved) are verified at the supplier. 

Medical and orthopedic programs from MTD Manufacturing include: serialized lot traceability (raw material heat to finished part), ISO 13485-aligned quality management system verification at the supplier, 100% CMM inspection on critical features, material certifications for medical-grade materials (316L stainless steel, Ti-6Al-4V, UHMWPE, PEEK), and biocompatibility and sterilization compatibility documentation where specified. 

Yes. MTD Manufacturing sources standard and application-specific fasteners and hardware under VMI (vendor-managed inventory) programs for line-side replenishment. VMI programs cover replenishment trigger management, consignment inventory options, supplier consolidation for multi-family fastener programs, and finish/coating certification (plating, Parkerizing, anodize) per shipment. Primary sourcing countries are Taiwan (for quality-consistent standard and specialty hardware) and India (for lower-unit-cost VMI programs across standard metric and imperial families).

Ready to Source?

Submit Your Part Specs to MTD Manufacturing

Send print, volume, and quality requirements. MTD responds within one business day with process recommendation, country of origin, and supplier match.