Rottler

What Rottler does

Rottler Manufacturing, LLC is a privately held US industrial machinery manufacturer founded in 1923 and headquartered in Kent, Washington. The company designs and builds CNC (Computer Numerical Control) engine building equipment used to machine engine blocks, cylinder heads, connecting rods, and other powertrain components. Its product portfolio spans multiple machine series — EM (40, 60, 70, 100), F (10, 60), H80, S, SG, and VR — covering boring, sleeving, surfacing, honing, seat and guide machining, head porting, and valve refacing across small to extra-heavy-duty engine applications (up to 45,000 lb blocks). Core technical differentiators include the proprietary 4C CAD/CAM/CNC/CMM software platform running on Windows touch-screen CNC controls, patented connecting rod fixtures, UNIPILOT carbide centering pilots, diamond abrasive honing, CBN/PCD dry milling surfacing, and Renishaw probe integration for 5-axis digitizing and automated measurement.

Rottler sells primarily to engine rebuilding shops, performance racing engine builders, and industrial diesel/marine/locomotive/power-generation/oil-and-gas rebuilders. The customer base spans named enterprise accounts such as Ed Pink Racing Engines, Roush Yates Engines, Mike & Sons, Innovation Marine, Holmes Auto, Xtreme Cylinder Heads, and LKQ, supported by a global network of authorized dealers and distributors alongside a direct enterprise field sales team. Pricing is quote-based and configured per customer requirements; no standard price list is published. Revenue is generated through one-time hardware sales of capital equipment, with no disclosed recurring software licensing or subscription stream. The company has been independently owned for its entire century-long history; a February 2026 funding round from Bochi Investments is the first disclosed external capital event.

Name

Rottler

Legal name

Rottler Manufacturing, LLC

Website

https://rottlermfg.com

Company type

Private

Founded year

1923

Operating status

Operating

Headcount range

101–250 employees

Short description

Rottler Manufacturing is a privately held, 100+ year old US maker of CNC engine building machinery, selling boring, surfacing, honing, and seat/guide equipment to engine rebuilders, performance racing shops, and industrial diesel/marine/locomotive customers worldwide through direct sales and dealers.

Ownership category

akta.pro rank

Product category

CNC Engine Building Machinery

NAICS

Machine Tool Manufacturing (333517), All Other Industrial Machinery Manufacturing (333248)

SIC

Machine Tools, Metal Cutting Types (3541), Electrical Industrial Apparatus (3620)

akta.pro primary industry

CNC Machine Tools (Turning, Milling, Machining Centers) (IMAHADAA)

akta.pro secondary industries

Motion & Machine Control (CNC, Robotics Controllers, Servo/Motion Controllers) (IMAGABAG), Industrial CAD/CAM for Manufacturing (EDAOAGAG)

Keywords

• CNC engine building machinery
• Cylinder head machining equipment
• Engine block boring machines
• Industrial CNC machining centers
• Valve seat and guide machines

Headquarters

HQ city

Kent

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. CNC Machine Sales: Rottler generates revenue primarily through the sale of CNC engine building machinery and equipment. This includes multiple machine series (EM, F, H, S, SG, VR) with varying capabilities for different engine rebuilding applications. Revenue is one-time at point of sale with no recurring software licensing fees mentioned.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Rottler Manufacturing designs, engineers and produces CNC engine building machinery and equipment for engine rebuilding shops, performance racing teams and industrial engine rebuilders. Its product lines cover boring, sleeving, surfacing, honing, valve seat and guide machining, head porting, connecting rod machining and multi-purpose CNC operations, with optional 4C CAD/CAM/CNC/CMM software running on a Windows touch screen CNC control.

Product overview

Rottler Manufacturing is a manufacturer of CNC engine building machinery and equipment serving various industries including diesel rebuilder, performance racing, marine, power generation, oil and gas, and heavy equipment. The product portfolio consists of multiple series of CNC machining centers: EM100 Series (extra heavy duty large engine blocks up to 45,000 lbs), EM60 Series (flexible CNC machining with automatic tool changer and 5-axis digitizing/porting), EM70 Series (medium capacity boring, surfacing, line boring), EM40 Series (smaller multi-purpose CNC), F Series (automatic boring, sleeving, surfacing), F60 Series (small-medium multi-purpose CNC), H80 Series (vertical cylinder honing with diamond abrasives), S Series (dry milling cylinder head surfacing with CBN/PCD inserts), SG Series (valve seat and guide machines in manual and CNC), and VR Series (valve refacing with centerless grinding). All machines feature Windows-based touch screen CNC controls with conversational programming, optional 4C CAD/CAM/CNC/CMM software, and support for operations including boring, surfacing, line boring, head porting, valve seat/guide machining, honing, and custom parts manufacturing.

Differentiator

Problem solved

Functional benefit

Products and services

• EM100 Series CNC Machining Centers Extra heavy duty multi-purpose CNC machining centers designed for very large engine blocks weighing in excess of 20,000 lbs, supporting boring, surfacing, line boring and universal machining operations for industrial and large diesel engines.
• EM60 Series CNC Machining Centers Flexible CNC machining centers for engine parts, digitizing, CNC head porting and custom CNC parts, featuring linear roller bearing slideways and advanced 4C CAD/CAM/CNC/CMM software; includes EM69ATC (with automatic tool changer) and EM69HP (5-axis high power).
• EM70 Series CNC Machining Centers Medium capacity multi-purpose boring, surfacing and line boring CNC machines designed for small to medium size diesel engine rebuilders and performance engine builders.
• EM40 Series CNC Machines Multi-purpose CNC machines for smaller engine rebuilding applications, including the EM45 programmable automatic 3-axis CNC machining center for small to medium engine rebuilding.
• F Series Boring and Sleeving Machines Automatic boring, sleeving and surfacing CNC machines recognized worldwide as the industry standard for engine block work, from F2B to F10XS; includes programmable hole-to-hole cylinder boring and surfacing models.
• F60 Series Multi-Purpose CNC Machines Small to medium multi-purpose boring, surfacing and line boring machines with touch screen CNC control for engine block and custom parts work.
• H80 Series CNC Vertical Honing Machines CNC vertical cylinder honing machinery featuring diamond abrasive technology for precise bore size, surface finish and consistent crosshatch angle, including hole-to-hole automation and heavy-duty variants.
• S Series CNC Cylinder Head Surfacing Machines Dry milling CNC cylinder head surfacing machines using CBN and PCD cutting inserts for fine Ra surface finish, available in horizontal travel sizes of 41 inches and 51 inches.
• SG Series Valve Seat and Guide Machines Complete range of cylinder head valve seat and guide machines from economical to extra large heavy duty capacity, available in manual (Manualmatic) and CNC variants with extreme concentricity accuracy and UNIPILOT carbide centering pilots.
• VR Series Valve Refacing Machines Valve refacing machines with centerless valve grinding and linear roller bearing slideways that grind valves to minimum CONCEN for improved sealing and performance.

Named customers5 records

Segments8 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Roush Yates EnginescoreStrategic or Co-development PartnerFeatured customer partnership with Roush Yates Engines, a leading NASCAR and racing engine builder. Rottler equipment is used in Roush Yates' high-performance racing engine manufacturing operations, demonstrating the equipment's capability for precision racing engine building applications.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Neway: Neway (part of the Neway Valve Seat group) manufactures valve seat cutting tools, pilots, and seat-and-guide equipment that overlaps with Rottler's SG Series and UNIPILOT carbide centering pilots. Both sell into the cylinder head and engine rebuilding channels.
• Serdi: Serdi is a French manufacturer of valve seat and guide machining centers that competes head-to-head with Rottler's SG Series. Both serve engine rebuilders and cylinder head shops with manual and CNC seat-and-guide machines.
• Sunnen Products: Sunnen is a leading US manufacturer of precision honing equipment, including cylinder and liner honing machines that directly overlap with Rottler's H80 Series. Both companies serve engine rebuilding, hydraulic, and industrial markets with similar capital equipment.
• Goodson Tools & Supplies: Goodson distributes and supplies engine building tooling, equipment, and supplies to rebuilders. It overlaps with Rottler in seat-and-guide tooling, valve refacing, and engine building consumables across the same customer base.
• Peterson Machine Tool: Peterson Machine Tool builds engine rebuilding machines including boring machines, surfacers, and line boring equipment that overlap with Rottler's F Series and EM series boring and surfacing machines.
• Kwik-Way: Kwik-Way manufactures engine rebuilding equipment including valve refacers, boring bars, and connecting rod fixtures that overlap with Rottler's VR, F, and connecting rod product lines for the engine rebuilding trade.

Emerging players

• Centroid Corporation: Centroid designs CNC controls, retrofits, and machining systems used in specialty machining applications including engine work, overlapping with Rottler's integrated 4C CNC control and software platform at the controller level.
• Tormach: Tormach produces small-format CNC milling machines and tooling popular with small engine builders, job shops, and educational buyers—adjacent to Rottler's EM40/EM70 entry-level machines but focused on broader prototyping and small-business use cases.

Broad incumbents

• Haas Automation: Haas is a major US-based CNC machining center and machine tool builder whose general-purpose vertical machining centers can substitute for some of Rottler's EM Series machines in engine rebuilding and custom parts applications, particularly for cost-sensitive buyers.

Others

• Renishaw: Renishaw is a leading metrology and probing technology supplier whose probes are integrated into Rottler's EM69HP machine. While not a direct competitor, Renishaw's probe technology is a key enabling component of Rottler's precision machining offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/rottlermfg
• YouTubeyoutube.com/user/Rottlermfg
• Facebookfacebook.com/rottlermfg
• LinkedInlinkedin.com/company/rottler-manufacturing-llc
• Instagraminstagram.com/rottlercnc

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds1 record

Investors1 record

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 Rottler