What Donsco Inc. does

Donsco Incorporated is a privately held, family-owned cast iron foundry founded in 1906 in Wrightsville, Pennsylvania, originally as Riverside Foundry. The company operates two foundries in southeastern Pennsylvania (Wrightsville and Mount Joy) producing short-run and longer-run gray, ductile, alloyed, and Austempered Ductile Iron (ADI) castings up to 150 pounds in horizontally and vertically parted molds. Donsco self-describes as "North America's leading single source provider of machined iron castings," serving industrial OEM customers across water systems, fluid power, agriculture, material handling, HVAC, railroad, and automotive sectors, with named accounts including CNH, Xylem, Meritor, and Liberty Pumps.

Donsco's core technology stack is vertically integrated from engineering design through pattern making, casting, machining, coating, heat treating, testing, and assembly. Engineering services include Solid Edge CAD modeling, Magmasoft solidification and flow simulation for defect prevention, Faro arm and scanner reverse engineering, and dedicated 3D printing for lights-out tooling and rapid prototyping. The in-house CNC machining operation spans roughly 25,000 square feet and includes 12 CNC horizontal lathes (6 with live tooling, 2 with sub-spindle), 4 CNC vertical lathes, 11 CNC CAT40 and 3 CNC CAT50 vertical milling machines, and 14 Toyoda horizontal machining centers. All plants are ISO 9001:2015 registered and IATF 16949 compliant, supporting entry into automotive and other highly regulated supply chains.

Donsco generates revenue through project-based, quote-priced B2B industrial casting contracts, sold through a direct sales-led motion with dedicated representatives, program managers, and order coordinators. Long-term supply relationships are reinforced through Vendor Managed Inventory (VMI) programs that hold inventory on 50+ machined castings for key customers with 2-week lead times. Pricing is not publicly disclosed; the standard RFQ turnaround is 48 hours, with 4-6 week standard lead times from design concept to full-machined castings and 2-3 week prototype turnaround. The company employed approximately 350 people as of the most recent disclosure, and is currently operating under a business continuation plan following a fire at the Wrightsville foundry.

Name

Donsco Inc.

Legal name

Donsco Incorporated

Website

https://donsco.com

Company type

Private

Founded year

1906

Operating status

Operating

Headcount range

251–500 employees

Short description

Donsco is a family-owned Pennsylvania cast iron foundry operating two plants that produce machined gray, ductile, alloyed, and ADI castings up to 150 pounds, serving industrial OEMs in water systems, agriculture, automotive, and material handling through vertically integrated design-to-finished-part services.

Ownership category

akta.pro rank

Headquarters

HQ city

Wrightsville

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Marketing or Sales, Technology or R&D

Revenue model

1. Cast Iron Casting Manufacturing: Manufacturing and sale of machined iron castings including gray, ductile, and alloyed iron. Castings produced range from ounces to 150 pounds. Revenue generated through project-based manufacturing contracts with industrial customers, typically long-term supply relationships.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Donsco operates two Pennsylvania foundries that manufacture gray, ductile, alloyed and austempered ductile iron (ADI) castings up to 150 pounds, delivered as fully machined finished components. The company is vertically integrated across patternmaking, casting, CNC machining, coating, heat treating, testing and assembly, offering customers a single-source supply chain from design concept through full-machined parts, supported by engineering services and Vendor Managed Inventory programs.

Product overview

Donsco Inc. is North America's leading single source provider of machined iron castings, operating two foundries in Pennsylvania that produce gray, ductile, and alloyed iron castings up to 150 pounds. The company offers a vertically integrated, single-source model combining full service foundry operations (Gray Iron Castings, Ductile Iron Castings, Alloyed Iron Castings, Austempered Ductile Iron Castings) with in-house CNC Machining Services, Engineering Services (including tooling, prototyping, and Magma casting simulation), Patternmaking, and Vendor Managed Inventory (VMI). This integrated approach enables Donsco to deliver finished parts from design concept through full-machined components.

Differentiator

Problem solved

Functional benefit

Products and services

• Gray Iron Castings Short-run and longer-running gray iron castings up to 150 pounds produced in horizontally and vertically parted molds, meeting ASTM A48, ASTM A159, ASTM A126, EN 1561, JIS G5501, and SAE J431 specifications, for industrial OEM customers needing manifolds, brackets, housings, and other cast components.
• Ductile Iron Castings Ductile iron castings up to 150 pounds meeting ASTM A536, ASTM A395, SAE J434, EN 1563, and JIS G5502 specifications, with separately cast Keel and Y-block test bars, for industrial OEM applications requiring higher strength and ductility than gray iron.
• Alloyed Iron Castings Alloy iron castings including Hi Silicon Molybdenum (Hi Sil, SAE J2582 SiMo, EN-GJS-SiMo) grades for specialty applications in the high-silicon-moly market, leveraging Mount Joy's specialty niche.
• Austempered Ductile Iron (ADI) Castings ADI castings meeting ASTM A897 specifications in grades 130-90-09, 150-110-7, 175-125-04, 200-155-02, and 230-185-01 for high-strength applications across industrial OEM markets.
• CNC Machining Services In-house CNC machining services using 12 CNC horizontal lathes (6 with live tooling, 2 with sub-spindle), 4 CNC vertical lathes, 11 CNC CAT40 vertical milling machines, 3 CNC CAT50 vertical milling machines, 12 Toyoda 550 horizontal machining centers, and 2 Toyoda 630 horizontal machining centers, plus complete manufacturing cells, converting castings into finished machined parts for industrial OEM customers.
• Engineering Services Tooling engineering, prototype development with 2-3 week turnaround, weldment conversions, casting simulation using Magmasoft software, 3D scanning and reverse engineering, and 3D printing for rapid prototyping — providing industrial OEM customers with engineering support from design concept through production-ready tooling.
• Patternmaking In-house pattern shop operations supporting mold and core production with multiple molding lines and machines, handling tooling relocation and new tooling development to keep patternmaking integrated with casting production.
• Vendor Managed Inventory (VMI) Inventory management service where Donsco holds inventory of machined castings for key customers, maintaining 2-week lead times across 50+ stocking program parts and freeing customers from managing casting-level inventory.

Quantifiable outcome

• 95%+ on-time delivery rate
• +6 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered supporting.

• Outside Pattern ShopssupportingOthersPartnerships with multiple outside tooling shops to supplement internal tooling capacity. Donsco has six CNCs and a 3-D printer dedicated to lights-out tool-making but also leverages external pattern shops for overflow and specialized capabilities.
• Outside Machine ShopssupportingImplementation/ SI/ Consulting PartnerStrategic partnerships with outside machine shops to extend machining capabilities beyond Donsco's 25,000 ft² in-house CNC machining facility. Strategic sourcing team dedicated to managing contractors to ensure qualified and on-time delivery.

Scale indicators10 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Metaltek International: Diversified metal component manufacturer with foundry capabilities in iron, steel, and non-ferrous alloys plus in-house machining. Overlaps directly with Donsco's single-source model of casting plus machined components across multiple alloys and end markets.
• Tyler Union: US producer of ductile iron fittings, valves, and waterworks castings. Overlaps with Donsco's ductile iron casting capabilities and serves an industrial customer base including water systems and pump OEMs.
• Grede Holdings: Major US-based iron foundry producing gray iron, ductile iron, and specialty iron castings for automotive, commercial vehicle, and industrial markets. Closely comparable to Donsco in product offerings, vertical integration, automotive certifications, and customer industries.
• Dotson Iron Castings: Iron foundry producing gray and ductile iron castings for agricultural, industrial, and OEM customers. Directly comparable as a competing iron foundry serving similar end markets with similar material range.
• Charlotte Pipe and Foundry: Leading US manufacturer of cast iron soil pipe and fittings, producing gray iron castings at foundries in the eastern US. Directly comparable iron foundry operation concentrated in plumbing/soil pipe and waterworks rather than machined industrial castings.
• American Cast Iron Pipe Company (ACIPCO): Diversified US iron manufacturer producing ductile iron pipe, fittings, and specialty castings for water infrastructure and industrial markets. Comparable as a US-based iron foundry serving industrial customers, though larger and more focused on pipe products.
• East Jordan Iron Works: North American iron foundry producing gray and ductile iron castings for waterworks, construction, and industrial markets. Comparable to Donsco in product category, materials, and industrial customer base.
• Waupaca Foundry: One of the largest iron foundries in North America, producing gray and ductile iron castings for automotive and industrial customers. Most directly comparable to Donsco in materials, product range, vertically integrated machining, and customer industries served.

Broad incumbents

• Howmet Aerospace (Precision Castparts legacy): Large diversified castings and engineered components company with iron, steel, and specialty alloy casting capabilities plus extensive in-house machining. A much larger competitor serving overlapping industrial casting markets but with broader alloy range and aerospace exposure.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/donsco

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Donsco Inc.