What Hoff Engineering Company does

Hoff Engineering Company, Inc. is a privately held industrial filter manufacturer founded in 1958 and headquartered at 475 S. Glaspie Street, Oxford, Michigan. The company designs, tests, and manufactures pleated filters and cartridges for industrial fluid and air filtration, including pleated bag filters, gradient depth tube-bag filters, one-micron polypropylene filters, wire EDM filters, Ebbco Hurricane canister replacement filters, and Charmilles-specific replacement filters featuring patented technology. Underlying capabilities include proprietary filter media development, patented and patent-pending construction methods, and the largest industrial pleating capacity in the Midwest (six industrial pleaters with pleat heights from .125 to 2.125 inches, capable of processing media rolls up to 40 inches wide). The firm provides complete in-house custom filter engineering using CAD, solid modeling, rapid prototyping, and 3D printing.

Hoff Engineering sells across at least 19 industry verticals, with primary focus on automotive (GM, Honda, Ford, Chrysler relationships exceeding 20 years) and the wire EDM sector (filters for Mitsubishi, Fanuc, Sodick, Makino, Charmilles/Agie, AccuteX, and Chmer machines), and secondary exposure to chemical/petrochemical, oil and gas (upstream, midstream, downstream), paints/inks/coatings, medical and healthcare (including NIOSH 95/99 and Covid-19-related design services), aerospace, government/military, and wastewater. The business model combines direct sales of standard catalog products, one-time and aftermarket replacement filter sales, custom filter design and manufacturing services, and third-party contract pleating services for other filter manufacturers. Distribution is direct-to-customer from the Michigan facility, with same-day UPS/FedEx shipment available for in-stock EDM filters across North America (USA, Canada, Mexico); pricing is not publicly disclosed and is provided on a quote basis with competitive positioning against OEM-supplied filters.

Revenue and ownership data are not disclosed in the source material; the company is independently held with no parent, no institutional investors, and no M&A activity on record. Sales channels are consultative and direct (phone and email), supported by a product-catalog-style website rather than broad digital marketing. The company has been the largest non-OE manufacturer of Ebbco Hurricane filters for nearly 30 years and was the first successful American manufacturer of EDM filters in the late 1980s.

Name

Hoff Engineering Company

Legal name

Hoff Engineering Company, Inc.

Website

https://hoffengineering.com

Company type

Private

Founded year

1958

Operating status

Operating

Headcount range

11–50 employees

Short description

Hoff Engineering Company is a Michigan-based industrial filter manufacturer founded in 1958 that designs, tests, and produces pleated filters, wire EDM filters, and custom filtration solutions for automotive, wire EDM, chemical, oil and gas, medical, and other industrial customers across North America.

Ownership category

akta.pro rank

Headquarters

HQ city

Oxford

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Revenue model

1. Industrial Filter Sales: Sale of standard and custom-designed industrial filters including pleated bag filters, EDM filters, and specialty filters. The company manufactures and inventories several well-established product lines for immediate shipment.
2. Custom Filter Design and Manufacturing: Complete in-house engineering services including filter design, prototyping, pre-production testing, and manufacturing for custom filter projects. Concept-to-reality approach for filter projects of all sizes and complexities.
3. Aftermarket Filter Replacements: Lower-cost replacement filters for OEM equipment including Ebbco Hurricane canisters, wire EDM machines from multiple manufacturers, and standard industrial filter housings.
4. Contract Pleating Services: The company welcomes contract pleating work, offering their extensive pleating production capabilities (largest in the Midwest) to other filter manufacturers.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels2 records

Core offering

Hoff Engineering Company designs, manufactures, and tests industrial filters and cartridges including pleated bag filters, wire EDM filters, gradient depth tube-bag filters, one micron polypropylene filters, and custom-designed filtration solutions. The company provides complete in-house engineering services from filter design and prototyping through pre-production testing and manufacturing, serving OEMs and aftermarket customers across automotive, aerospace, chemical, oil and gas, pharmaceutical, and other industrial sectors in North America.

Product overview

Hoff Engineering Company is an industrial filter manufacturer operating since 1958 from Michigan, offering a broad portfolio of filtration products and custom engineering services. The core product lines include pleated bag filters (both synthetic and cellulosic variants, in standard P1/P2/P4 sizes), specialty EDM filters (wire EDM filters, Eco-Easy insert-filters, CanDo insert-filters for Ebbco Hurricane canisters, and Charmilles-specific filters), gradient depth tube-bag filters (POLYFELT), one micron polypropylene filters, and general industrial filters spanning coolant, chemical, petrochemical, paint, oil and gas, and wastewater applications. These are complemented by medical and Covid-19 filter design services offering custom prototyping and qualification support. Hoff Engineering provides complete in-house engineering capabilities including filter design, prototyping, testing, and manufacturing, supported by proprietary US patents. The company positions itself as a technology innovator with expertise in fiber technologies and pleating production, serving OEMs and aftermarket customers across diverse industrial sectors including automotive, aerospace, chemical, pharmaceutical, and energy.

Differentiator

Problem solved

Functional benefit

Products and services

• POLYFELT Gradient Depth Tube-Bag Filters Gradient depth tube-bag filters with 650 cubic inches of depth filtration capacity using 100% polypropylene meltblown media with controlled density gradient for increasingly efficient inside-out flow. Available in 1 to 200 micron ratings and fits standard Size 2 housings. Patent-pending design.
• One Micron Polypropylene Filters 100% polypropylene meltblown media pleated filters rated at one micron, featuring rugged pleats that withstand high PSID with a maximum operating pressure of 35 PSID at 70°F. Solvent-resistant ends provide wide chemical compatibility.
• Pleated Bag Filters and High Capacity Bag-Sized Pleated Cartridges Pleated bag filters and felt/cellulose pleated cartridges providing six to eight times the filter surface area of conventional Size 2 filter bags, reducing change-outs and manufacturing downtime. Available in polyester, polypropylene, cellulose, and synthetic/cellulose blend media. Fit standard P2, P1, and P4 size housings from FSI, Rosedale, Eaton, and Krystil Klear.
• Synthetic Pleated Bag Filters Self-supporting synthetic pleated bag filters that withstand high operating pressures without reinforcing scrim, offering six to eight times the surface area of conventional Size 2 filter bags. Custom engineered for automotive, chemical process, parts washing, solvents, metalworking fluids, and wastewater applications.
• Cellulosic Pleated Bag Filters Self-supporting cellulosic pleated bag filters offering eight to ten times the filter surface area of conventional Size 2 filter bags, resulting in fewer change-outs and reduced downtime. Available in cellulose and synthetic/cellulose blends for chemical process, coolant, wastewater, metalworking, paint and coating, and parts washer applications.
• Wire EDM Filters Wire EDM filters manufactured for Mitsubishi, Sodick, Fanuc, Charmilles/Agie, Makino, AccuteX, and Chmer wire EDM machines, including in-tank style and quick-disconnect fitting type filters. Supports filtration requirements from three to ten microns.
• Eco-Easy Insert-Filters Environmentally friendly insert-filter with a reusable stainless steel basket designed to reduce consumables waste. Compatible with Mitsubishi, Fanuc, Sodick, Makino, and Charmilles EDMs without retro-fitting, offering approximately 60% of the cost of OEM-supplied filters while providing equivalent service life.
• CanDo Insert-Filter (Ebbco Hurricane) Replacement insert-filter for Ebbco Hurricane canisters featuring reusable support components including core, internal seal, cylindrical fixture, and inside O-ring. Available in one and five micron ratings with high-flow, super-strong media and O-ring seals top and bottom.
• Charmilles Filters Replacement filters for Charmilles wire EDMs, including P/N 600614 (Mann+Hummel style 614), P/N 600628 (double-length 614), and P/N 600617/P/N 600601 for Charmilles 240 and 440 machines. Features MAXI TWO-SHOT technology (US Patent #6,881,330).
• Ebbco Hurricane Canister Filters Aftermarket filters for Ebbco Hurricane canister filtration systems. CanDo filters feature O-ring seals top and bottom with rugged construction designed for reuse and fit Harmsco housings. Available in sub-micron, one micron, and five micron ratings.
• Coolant, Washer, and Grinding Fluids Filters High capacity coolant filters and pleated bag filters for industrial manufacturing processes sensitive to contaminant presence. Used in automotive assembly, parts washing, and powertrain manufacturing at GM, Honda, Ford, and Chrysler facilities.
• Chemical and Petrochemical Filters Chemical industry filters for purifying feedstocks, removing emulsions from liquids, cleaning and reusing process fluids, and final production polishing. Used in catalyst removal, resin production, general chemical production, and protection of critical pumps and valves.
• Paints, Intermediates, and Inks Filters Filter elements and pleated bag filters for paint, coating, and ink production from pre-filtration of raw materials through production process, loading, and transportation. Applications span automotive coating, ink jet production, and printing.
• Oil and Gas Filters Filters for upstream, midstream, and downstream oil and gas operations including completion fluid filtration, water injection, produced water disposal, hydraulic fracturing, and midstream pipeline transportation. Includes downstream refining filters that maximize contaminant removal and extend capital equipment life.
• General Industrial Filters Custom engineered industrial filters for challenging applications in specialty and niche markets. Includes air and liquid filters, automotive filters, machine tool filters, coolant filters, parts washer filters, oil filters, gas filters, potable water filters, petrochemical filters, chemical filters, wastewater filters, hydraulic filters, agricultural filters, food and beverage filters, mining filters, diesel filters, and more.
• Custom Designed Filters Complete in-house engineering services including filter design, prototyping, pre-production testing, and manufacturing for custom filter projects of all sizes. Uses CAD (Inventor), solid modeling, rapid prototyping, and 3D printing. Offers budget-conscious cartridge concepts, quick prototype turnaround, and proprietary US filter patents for proprietary solutions.
• Metalworking Fluids Filters Metalworking fluids filters that remove metal chips and grinding grit to protect finished product precision, extend coolant service life, and reduce downtime. Research-driven and field-tested pleated bag filters used across North American machine shops and production facilities.

Quantifiable outcome

• Eco-Easy insert-filter costs approximately 60% of the best O.E.-supplied filters while providing equivalent service life
• +3 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• EbbcocoreOEM/ Whitelabel/ Licensing PartnerHoff Engineering is the largest non-OE manufacturer of filters for the Ebbco Hurricane Filtration Systems. Has manufactured Ebbco replacement filters for almost 30 years, developing the New CanDo Insert-Filter as a cost-efficient alternative for Ebbco Hurricane canisters.
• Mitsubishi Wire EDMcoreTechnology or IntegrationHoff Engineering manufactures filters compatible with Mitsubishi wire EDMs including CX, FX, RA, QA, and FA series machines. Products include in-tank style, quick disconnect fitting type, and sinker EDM filters. Compatible with existing filter cabinets without retro-fitting.
• Fanuc Wire EDMcoreTechnology or IntegrationManufactures Fanuc wire EDM filters as lower-cost alternatives to original equipment filters with exceptional deionized water cleanliness and service life equivalent to best original equipment filters.
• Sodick Wire EDMcoreTechnology or IntegrationProduces Sodick EDM filters including specific filters for Sodick's evolving wire EDM options. Filters developed for three micron, five micron, and ten micron filtration requirements.
• Makino Wire EDMcoreTechnology or IntegrationManufactures Makino wire EDM filters compatible with existing filter cabinets without retro-fitting requirements. Filters provide reliable performance at competitive prices.
• Charmilles/Agie Wire EDMcoreTechnology or IntegrationProduces Charmilles/Agie filters including Mann+Hummel style 614 filters and Charmilles 240 and 440 filters. Features MAXI TWO-SHOT US Patent #6,881,330.
• FSI (Filter Specialists Inc.)minorChannel Partner/ Reseller/ DistributorHoff Engineering pleated bag filters are designed to fit standard P2 size industrial housings made by FSI, enabling compatibility with FSI's distribution network.
• EatonminorChannel Partner/ Reseller/ DistributorPleated bag filters fit common P2 size housings made by Eaton and Eaton legacy (Ronnigen-Peter and Hayward) for broad market compatibility.
• Rosedale ProductsminorChannel Partner/ Reseller/ DistributorFilters designed to fit Rosedale Products housings and distribution channels, ensuring compatibility with existing customer installations.
• Krystil KlearminorChannel Partner/ Reseller/ DistributorPleated bag filters designed to fit Krystil Klear industrial housings for comprehensive market coverage.
• Top Filtration Industry SupplierscoreStrategic or Co-development PartnerLong-standing strategic alliances with filtration industry suppliers that manufacture media, end cap and support component materials, and adhesives. Provides timely access to new and emerging technologies.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Shelco Filters: Manufacturer of industrial filter cartridges and housings for liquid and gas filtration. Directly comparable as a privately held, niche player serving similar chemical, petrochemical, and OEM customers with cartridge filtration solutions.
• Rosedale Products: Manufacturer of industrial filter housings and filtration consumables. Hoff Engineering's pleated bag filters are designed to fit Rosedale housings, making them direct competitors for industrial liquid filtration customers across chemical, paint, and parts-washing applications.
• Graver Technologies: Manufacturer of meltblown and pleated filter cartridges for industrial liquid filtration. Directly comparable because both companies sell depth and pleated cartridges into chemical, pharmaceutical, and industrial process applications.
• Filter Specialists Inc. (FSI): Manufacturer of industrial filter housings and bag/cartridge filtration products. Directly comparable because Hoff Engineering explicitly designs its pleated bag filters to fit FSI's standard P2 size housings, putting the two firms in direct competition for the same bag-filter replacement business.
• Harmsco: Manufacturer of industrial cartridge filters and filtration housings. Hoff Engineering's CanDo insert-filter for Ebbco Hurricane canisters is specifically designed to fit Harmsco-style housings, positioning Harmsco as a direct peer in the cartridge replacement market.

Broad incumbents

• Mann+Hummel: Global filtration leader serving automotive, industrial, and life sciences markets. Comparable as a broad incumbent with significantly greater scale, global manufacturing footprint, and OEM relationships that overlap with Hoff Engineering's automotive and industrial customer base.
• Donaldson Company: Global manufacturer of filtration systems serving industrial, OEM, and aftermarket customers. Comparable as a broad incumbent with established industrial liquid and air filtration lines that compete directly with Hoff Engineering's general industrial and OEM business.
• Eaton: Global industrial conglomerate with a filtration business (including legacy Ronnigen-Peter and Hayward). Comparable as a broad incumbent whose P2-size housings Hoff Engineering filters are explicitly designed to fit, making Eaton both a partner-spec competitor and a much larger rival.
• Parker Hannifin: Diversified motion and control technologies company with a substantial industrial filtration division. Comparable as a broad incumbent offering hydraulic, lube, and process filtration products that overlap with Hoff's industrial fluid filtration portfolio.
• Pall Corporation: Global filtration, separation, and purification company owned by Danaher. Comparable as a broad incumbent in industrial and process filtration, particularly relevant for Hoff's chemical, petrochemical, and oil & gas business.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/HoffEngineering
• Facebookfacebook.com/hofffilters
• LinkedInlinkedin.com/company/hoff-engineering-co-inc

Revenue estimate

Valuation estimate

Number of profiles

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 Hoff Engineering Company