C-450 & SL-450 Cylinder Finishers


GOMACO Corporation pioneered the development of the first cylinder finisher over 50 years ago. The late Harold W. Godberson, founder of GOMACO Corporation, developed and manufactured a bridge deck finisher to meet the growing needs for bridge markets. Considered to be a milestone, the cylinder finisher made GOMACO a recognized name in the construction industry.

Today, GOMACO cylinder finishers are designed for versatility with the C-450. It is easy to operate and saves time and labor costs on all of your concrete finishing projects.

Pin-connected sections provide fast setup time and the versatility to fit exact job requirements. The C-450 frame widths range from 12 feet (3.66 m) to 104 feet (31.7 m), with transitional framework attached.




Introducing The High-Production Screed For Slabs & Bridge Decks


• Introducing the revolutionary high-production, truss-mounted screed, for paving of bridge decks, flat slabs, and concrete floors.

• The new GOMACO screed can advance as much as four feet (1.22 m) in a single pass to drastically reduce your finishing time, providing savings in your concrete delivery cost and total project labor.

• The leading auger is 5.7 feet (1.74 m) long and provides high-production strike-off action and reduces the number of puddlers you need out in front for the project.

• The five foot (1.52 m) long finishing cylinder compacts and finishes the concrete in a single pass.

• The six foot (1.83 m) trailing screed provides the final finish to the surface with a unique GOMACO-designed vibratory system.

• The GOMACO high-production screed with a patent pending design for tilt and skew is mounted to our C-450 truss system.

• This is instrumental in the optional 3D package available for the high-production screed to finish to a 3D model design.

• The new screed system now allows you to economically finish city streets, concrete floors, bridge decks, tunnels, and canals at widths up to 104 feet (31.7 m).

• GOMACO was founded to manufacture bridge deck finishing equipment and continues to be “Dedicated to Concrete - Dedicated to You” and continues the work to advance bridge deck and flat slab technology.


high-production truss-mounted screed

GOMACO's high-production, truss-mounted screed, for paving of bridge decks, flat slabs, and concrete floors.




high-production truss-mounted screed

The revolutionary high-production screed has an auger, finishing cylinder, and trailing screed in series to finish the concrete in one pass.




high-production truss-mounted screed

high-production truss-mounted screed

The 5.7 foot (1.74 m) long auger can advance as much as four feet (1.22 m) in a single pass.




high-production truss-mounted screed

The C-450 and high-production screed can be controlled by a touchscreen on ground level. With the operator being at ground level, they can view exactly what the machine and high-production screed is producing so they can control how far to advance it or what changes need made during the paving process.



C-450 with high-production truss-mounted screed

Two ready-mix trucks feed a concrete pump providing the C-450 and high-production screed with a constant supply of concrete to finish this 21 inch (533 mm) deep bridge project.




High-Production Screed
2 minutes 41 seconds








Transitional Framework


GOMACO Bridge Deck Finishers - Available with Transitional Framework and Third Wheel Assist

The transitional framework is a design option for the GOMACO C-450 cylinder finisher that provides faster assembly and weight savings compared to wider-width finishers requiring an overhead truss system. The new frame features transition sections connecting the C-450’s standard 24 inch (610 mm) tall framework to the 42 inch (1067 mm) tall framework used on a C-750 finisher. The frame sections only need to be pin-connected and the cross arms bolted in place.

The transitional framework sections can also be removed and the C-450 can finish at smaller widths with its standard 24 inch (610 mm) framework. The framework allows the versatility of two finishers in one for the narrower or wider widths. The transitional framework can be added to new or existing C-450s.

GOMACO’s line of bridge deck finishers is also available with the optional third wheel assist on the standard bogies to further distribute the machine’s weight while traveling on the rails. The optional third wheel assist bogies, on each side of the finisher, consist of two single-wheel idler bogies attached to the spreader beam. It’s a simple modification that can be made to any C-450 or C-750 to help spread the weight out and reduce the wheel load on the overhang brackets.



C-450 graphic, transitional framework

The C-450 with transitional framework - Yellow: standard 24 inch (610 mm) tall C-450 framework and components. Red: transitional framework. Blue: 42 inch (1067 mm) tall framework.








The C-450’s transitional framework allows for wider finishing. It has a quick assembly time since the frame sections only need to be pin-connected and the cross arms bolted into place.




C-450 graphic, third wheel assist package

The C-450’s third wheel assist package is highlighted in red.







C-450 Concrete Cylinder Finisher
4 minutes 5 seconds







Versatile Frame and Finishing Width...

The frame width for the standard C-450 cylinder finisher is 12 feet (3.66 m) to 72 feet (21.95 m). The frame width on the C-450 with transitional framework is a minimum of 12 feet (3.66 m) to a maximum of 104 feet (31.7 m).



C-450 graphic



C-450 graphic




SL-450 Conversion Kit

The GOMACO C-450 can be converted to an SL-450 with the slope paver conversion kit. The kit includes four slope adapter jack mounts, two stationary jack mounts, carriage engine slope mounts, slope idler sprocket assemblies, drive chain, end panel drive sprockets, carriage wheels, and two hydraulic motors. The complete slope paver conversion kit is specifically designed for field installation. The SL-450 is designed for fast trimming and finishing, strict tolerances, even on 1:1 (45 degree) slopes, with a minimum of handfinishing.




Bristol Motor Speedway - GOMACO SL-450 Concrete Cylinder Finisher & GOMACO Spanit® Work Bridge
Bristol, Tennessee
8 minutes 52 seconds




C-450 Cylinder Finisher Specifications


Kohler, air-cooled gasoline.
Horsepower: 18 hp (13.4 kW) @ 3000 rpm.
Electric Start: 12 volt start motor with a 25 amp regulator-rectifier.


Fuel Reservoir:
Carriage 9 gal. (34 L). Console 9 gal. (34 L).
Hydraulic Oil: Carriage 9 gal. (34 L). Console 15.3 gal (57.9 L).


Hydraulic console with easy-to-operate controls, including variable travel. Can be positioned in other locations on the main frame for operator safety and convenience.
Carriage Drive: Designed for operator ease in controlling travel speed and direction of the carriage.


Traction Drive:
Two drive and two idler bogies standard. Drive bogies include two hydraulically-driven flanged wheels, 3.25 in. (83 mm) wide for 2 in. (51 mm) square tube. Optional cupped or urethane wheels are available.
Traction Speed: Up to 31 fpm (9.4 mpm).


All-welded steel, pin-connected main frame.


Two 10 in. (254 mm) x 15 in. (381 mm) wheels with 12-ply tires and removable towing tongue for job site use only.
Hydraulic Vertical Lift: 48 in. (1219 mm).


Standard 24 in. (610 mm) Deep Frame Assembly:
12 ft. (3.66 m) to 72 ft. (21.95 m).
Frame Transition Extensions: Positioned in the center of the C-450 frame, provides increased frame strength for widths over 72 ft. (21.95 m) up to 104 ft. (31.7 m). Frame transition extensions available in 8 ft. (2.44 m) and 12 ft. (3.66 m) lengths and a depth of 3.5 ft. (1.07 m). Consult factory for machines over 72 ft. (21.95 m) wide.
Note: Finishing width is normally 36 in. (914 mm) less than frame width indicated.


Frame Sizes:
The frame is adjustable in 2 ft. (.61 m), 4 ft. (1.22 m), 8 ft. (2.44 m), 12 ft. (3.66 m), or 16 ft. (4.88 m) increments. The C-450 assures a specified tolerance of one-eight inch (3 mm) in 12 ft. (3.66 m). A self-widening capability provides use on tapered decks and slabs. A 360 degree turntable on the upper carriage allows maximum skewing of the undercarriage to keep the finishing cylinder parallel to the center of the slab.


Hydraulic Operation:
Console controlled infinite adjustment for on-the-go crown elevation changes. Power transition adjusters can be installed at most frame pin-connected points.


Finishing Cylinder:
One 10 in. (254 mm) diameter, 48 in. (1219 mm) long.
Optional: Single-cylinder or double-cylinder with either 48 in. (1219 mm) or 60 in. (1524 mm) long cylinders.
Augers: One 10 in. (254 mm) diameter (right-hand) and one 10 in. (254 mm) diameter (left-hand), 14 in. (356 mm) long with auger guard.
Finishing Pan: 25 in. (635 mm) x 22 in. (559 mm) trailing float pan.


Trimmer Wheel:
10 in. (254 mm) x 48 in. (1219 mm) trimmer wheel for fine grading the subgrade.
Tooth Holders: Standard holders with 32 replaceable cutter teeth.


Three console auxiliary hydraulic circuits for attachments.
Automatic advance.
Eight-roller carriage system with rail pinch rollers.
Bogies with 36 in. (914 mm) wheel base.
Operator’s platform.



Engine (2):
Type: Honda, air-cooled gasoline.
Horsepower: 19 hp (14.1 kW) @ 3000 rpm.
Electric Start: 12 volt start motor.

Engine (2):
Type: Yanmar diesel.
Power: 19.9 hp (14.8 kW) @ 3000 rpm.

Power transition adjuster (PTA).

Transport assembly.

Adjustable hydraulic, pan-type vibrator for latex overlay applications or with protruding fin for street work.

Hydraulic, stinger-type vibrator and mount assembly, equipped with bent vibrator which rotates

180 degrees at the end of each pass, to allow vibration close to paving form.

Single-cylinder or double-cylinder undercarriage with 60 in. (1524 mm) long cylinder and external vibration.

Incorporated cylinder lowering attachment.

Hydraulic cylinder lowering attachment.

Main frame extensions.

Adjustable single-auger or double-auger assembly, double-wrap 7.75 in. (197 mm) diameter by 24 in. (610 mm) long augers with a 3 in. (76 mm) pitch. Augers can be vertically adjusted to 1 in. (25 mm) above or below the finishing cylinders.

Four hydraulically powered bogies for all wheel drive.

Third wheel assist bogies, consisting of four single-wheel idler bogies and spreader beam to distribute machine weight.

Bogies with 41 in. (1041 mm) wheelbase.

Spare console, upper and undercarriage assembly.

Additional emergency stop buttons available.

Other options are available to customize machine to accommodate applications and customer needs.








For Additional Information


Cylinder Finishers Information

Photos: C-450 & SL-450

Download The Cylinder Finishers Brochure (PDF)

Download The High-Production Screed Brochure (PDF)

Download The GOMACO Full Line Brochure (PDF)

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