About Rottler

Used Rottler CNC Machines for Sale

Resell CNC is your Simple. Reliable. and Trusted.® source for used Rottler CNC engine building and remanufacturing machinery — including multi-purpose CNC machining centers, cylinder boring machines, block and head surfacers, CNC honing machines, 5-axis cylinder head porting and digitizing systems, valve seat and guide machines, connecting rod boring machines, and heavy-duty diesel engine equipment. We carry Rottler models across the full product line, from the F69A and F69ATC multi-purpose machining centers through EM69P and P69 5-axis CNC porting machines, H85A and HP-series honing machines, S85A surfacers, SG-series seat and guide machines, and the F103/F107/F109 heavy-duty diesel platforms.

Rottler Manufacturing was founded in 1923 by Clarence T. Rottler in Kent, Washington, originally as the Rottler Boring Bar Company. The first machine was a portable boring bar hand-carried on a streetcar to a customer. Over the following century, Rottler grew into the industry leader in engine rebuilding and remanufacturing equipment, constructing a 55,000 sq ft manufacturing facility on a 4.5-acre site in Kent (near Seattle). The company transitioned from mechanical controls to CNC-based systems between 1985 and 1997, and today offers fully automated machining centers with proprietary Windows-based touch screen controls and 4C CAD/CAM/CNC/CMM software. Now in its third generation of family management under Andy Rottler, the company exports over 50% of production worldwide and maintains the largest domestic facility 100% dedicated to engine building machinery.

Looking to sell your Rottler? Resell CNC buys used Rottler machines nationwide: any model, any generation, any condition. Free appraisal within 24 hours, competitive offers, and we handle all rigging and transportation. Call (844) 478-8181 or email sales@resellcnc.com.

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Rottler CNC Machining Centers & Boring Machines

Rottler's multi-purpose CNC machining centers handle cylinder boring, block surfacing, head surfacing, line boring, lifter boring, and general-purpose milling in automated cycles. The F69A (3-axis CNC) and F69ATC (with 24-tool automatic tool changer) serve performance and production engine builders. The F103A/F104A/F105A platforms machine on-highway truck and bus engines, while the F107/F109 series handles large diesel blocks including Caterpillar 3500-series, Waukesha, and White Superior engines. All models feature Rottler's proprietary Windows-based touch screen CNC with conversational programming.

Rottler Porting, Honing, Surfacing & Seat/Guide Equipment

The EM69P and EM69HP 5-axis CNC machines digitize and port cylinder heads and intake manifolds with no handwork required. The P69 5-axis CNC porting machine delivers precision port reproduction. Rottler's H85A and HP-series vertical honing machines provide CNC automatic hole-to-hole honing with optional block roll-over. The S85A surfacer handles block and head resurfacing. SG-series seat and guide machines (SG10XY, SG80AII) feature Rottler's Activ Spindle technology for precision valve seat cutting and guide installation.


Founded	1923, Kent, Washington, USA
Headquarters	Kent, Washington, USA (near Seattle)
Manufacturing	55,000 sq ft facility, 100% made in USA
Best Known For	CNC boring bars, honing machines, surfacers, 5-axis porting, seat & guide machines
Popular Models	F69A, F69ATC, EM69P, P69, H85A, S85A, SG10XY, F103A, F109K
CNC Controls	Proprietary Rottler Windows touch screen CNC with 4C CAD/CAM/CNC/CMM software
Industries Served	Performance engine building, diesel remanufacturing, automotive aftermarket, marine, industrial engines, OEM

What to Look for When Buying a Used Rottler

Rottler machines are purpose-built for engine rebuilding and remanufacturing, with specialized functions that require careful inspection. Used units often have significant life remaining, but verifying machine-specific systems is essential.

On boring machines, check spindle condition, column alignment, and travel accuracy. Test the boring spindle for runout and smooth operation across the full speed range. On traveling column models (F69A, F103A, F109K), verify column alignment and squareness to the table. Check X, Y, and Z axis positioning accuracy using a dial indicator or laser. On CNC models, run a test bore cycle and measure the resulting bore for roundness, taper, and surface finish.

On honing machines, verify stone condition, stroke system, and automation. On the H85A and HP-series, inspect honing stones and expansion mechanisms for wear. Test the automatic hole-to-hole positioning system for accuracy. Verify the stroke length adjustment and crosshatch angle control. On machines with block roll-over capability, test the rotation mechanism for smooth, reliable operation.

On 5-axis porting and digitizing machines, test all axes and the spindle. The EM69P and P69 use 5-axis CNC for complex port geometry. Verify smooth motion on all five axes with no backlash. Test the digitizing probe for accurate surface capture. Confirm the high-speed spindle (if equipped) for runout and bearing condition. Verify that the 4C software package is installed, licensed, and functional.

Evaluate the CNC control and software. Rottler machines use proprietary Windows-based touch screen CNC controls. Verify the control boots properly, all touch screen functions respond, and stored programs load correctly. On machines with 4C CAD/CAM/CNC/CMM capability, test the full software workflow from digitizing through machining. Confirm the control version and any available software updates.

Rottler Multi-Purpose CNC Machining Centers

F69A & F69ATC

The F69A is Rottler's flagship 3-axis CNC machining center for engine block work: cylinder boring (1.5 to 9.0 inch diameter), block surfacing, head surfacing, line boring, lifter boring, and automatic milling. The F69ATC adds a 24-tool automatic tool changer and enclosed coolant system, combining block machining with head porting and general parts manufacturing in one machine. Both use Rottler's Windows touch screen CNC with conversational programming.

F103/F104/F105 & F107/F109 Heavy-Duty Series

The F103A, F104A, and F105A machine on-highway truck and bus engine blocks. The F107AHL and F109AHL handle larger diesel engines. The F109K machines the largest industrial blocks including Caterpillar 3500-series (3508, 3512, 3516, 3520), Waukesha 9390, and White Superior 825. All heavy-duty models feature traveling column designs with extended X, Y, and Z travels for oversized castings.

Rottler 5-Axis CNC Porting & Digitizing

EM69P, EM69HP & P69

The EM69P is a 5-axis CNC digitizing and porting machine that captures port geometry with a touch probe, then reproduces it in CNC machining with no handwork required. The EM69HP is the high-power version with increased spindle capability for harder materials. The P69 is a dedicated 5-axis CNC porting machine for high-volume head production. All models use Rottler's 4C software for integrated CAD/CAM/CNC/CMM workflow.

Rottler Honing, Surfacing & Seat/Guide Machines

Honing: H85A & HP Series

The H85A is a CNC automatic vertical honing machine with hole-to-hole automation and optional block roll-over. The HP series (HP2A through HP7A) covers a range of honing applications from small automotive bores through large diesel cylinders. All feature Rottler's CNC controls for consistent crosshatch angle and bore geometry.

Surfacing & Seat/Guide

The S85A surfacer handles block and cylinder head resurfacing with up to 53 inches of cutter travel and a 16-inch milling head. The SG10XY and SG80AII seat and guide machines feature Rottler's Activ Spindle technology for precision valve seat cutting and guide installation with CNC control.

How to Sell Your Used Rottler

Rottler machines hold strong resale value as specialized, American-made engine building equipment. The F69A/F69ATC machining centers, EM69P porting machines, and H85A honing machines are in steady demand from performance engine builders and diesel remanufacturers.

Resell CNC buys used Rottler machines: every model, every generation, nationwide.

Contact us — call (844) 478-8181 or email sales@resellcnc.com.
Free appraisal within 24 hours, no obligation.
Accept the offer — we handle rigging, transport, and logistics.

Frequently Asked Questions About Used Rottler Machines

What types of machines does Rottler make?

Rottler manufactures CNC and manual engine building equipment: multi-purpose boring/surfacing machining centers, 5-axis cylinder head porting and digitizing machines, vertical honing machines, block and head surfacers, valve seat and guide machines, connecting rod boring machines, and heavy-duty diesel remanufacturing systems.

Are used Rottler machines reliable?

Yes. Rottler machines are 100% manufactured in Kent, Washington with in-house quality control on every component. The company has over 100 years of engine building equipment experience. Many legacy Rottler boring bars and honing machines remain in daily production service decades after installation.

What CNC control does Rottler use?

Rottler uses proprietary Windows-based touch screen CNC controls designed specifically for engine building operations. The 4C software package provides integrated CAD/CAM/CNC/CMM capability on porting and machining center models. Conversational programming requires minimal CNC experience to operate.

What Rottler models hold their value best?

F69A and F69ATC multi-purpose machining centers, EM69P 5-axis porting machines, and H85A CNC honing machines maintain the strongest resale values. Heavy-duty diesel models (F103A, F109K) also hold value in the remanufacturing market. Call (844) 478-8181 for current valuations.

Does Resell CNC offer financing on used Rottler machines?

Yes. Resell CNC offers flexible financing options to help your engine shop acquire the equipment it needs. Contact us at (844) 478-8181 to discuss terms.

How do I sell my used Rottler?

Contact Resell CNC at (844) 478-8181 or sales@resellcnc.com. We buy every Rottler model, from legacy manual boring bars through current CNC machining centers and 5-axis porting machines. Any condition, nationwide. Free appraisal within 24 hours.