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 and C-750. They are easy to operate and save 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. The C-750 frame widths range from 16 feet (4.88 m) to 160 feet (48.77 m).

Bridge Deck Finishing - GOMACO has the proven bridge deck finishers. All-welded steel construction provides the sturdiest, yet most lightweight finishers on the market.

Strictest Tolerances - GOMACO finishers assure you less than one-eighth inch (3 mm) tolerance in 12 feet (3.66 m) while finishing high-slump or low-slump concrete.

Crown Adjustment - GOMACO offers optional hydraulic power transition adjusters (PTAs) for on-the-go crown elevation changes made from the operator’s console. PTAs may be installed at pin-connected points.




GOMACO C-450 Concrete Cylinder Finisher
4 minutes 5 seconds





Bridge Deck Finishing






This C-450 is finishing a 38 foot (11.58 m) wide, 5.5 inch (140 mm) thick overlay in New York, U.S.A. The concrete they are using contains microsilica, which makes the concrete very sticky, but the external vibrating double-cylinder undercarriage handles the concrete extremely well.

The GOMACO finisher features the optional fogger system, which is a mister stationed ahead of the cylinders. This allows a smooth finish from the machine, with minimal hand finishing for the crew. A turf drag is also used on this project to texture the concrete after each pass.

This project has very tight working conditions with only six inches (152 mm) of granite curb to run the rails on for the bogies. The machine’s legs were raised so the machine was five feet (1.5 m) in the air, which helps keep the machine cleaner and makes it easier for the crew to work around the machine. Since the machine is raised higher than normal, a 36 inch (914 mm) lowering kit is needed for the carriage to reach the concrete.

The C-450 works on one side of the bridge while the other side has live traffic running at speeds up to 70 mph (112.7 kph). Pump truck access is a challenge, as well, because of the fast-paced traffic. This pour is done with a pump truck stationed underneath the bridge.




GOMACO Finishers Provide Versatility

Pan-Type Vibrator

The hydraulic pan-type vibrator is used for latex overlay applications.



The above C-450 is using the pan-type vibrator extended in front of the adjustable augers.




adjustable augers

The 24 inch (610 mm) long adjustable augers are an optional attachment for maximum leveling capabilities.







Fogger System

The optional fogger system for the GOMACO cylinder finishers is a set of mister bars mounted to both sides of the undercarriage, ahead of the finishing cylinder(s). This helps keep the concrete from sticking to the cylinders during finishing in order to create a smooth finish.


fogger system






Vibrating Finishing Cylinder(s) for Low-Slump and High-Density Overlays

The GOMACO single and double vibrating cylinders are designed for low-slump and high-density overlays. The system is the only cylinder finisher available that compacts and consolidates material with cylinder vibration. This means total versatility for your finisher, allowing you to finish low-slump and high-density overlays, including microsilica overlays.

Variable settings allow adjustments for frequency of vibration for various mix designs. The vibrating cylinders are capable of 6700 vibrations per minute to meet the strictest specifications. This allows you to obtain required density and finishing specifications on overlays. The single and double vibrating cylinders are available for the complete line of GOMACO finishers.


C-450 and Spanit

The C-450 is followed by a Spanit® work bridge on a polymer overlay project.




C-450 with pan type vibrator and double cylinders

A GOMACO C-450 is using a pan-type vibrator and double cylinders to provide a smooth finish on a latex overlay.






Skewed Carriage

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. Automatic advance on the C-450 allows the machine to automatically advance to any pre-set distance at the end of each carriage pass. As the machine advances, the undercarriage can change its attack angle and concrete finishing resumes.


three point finishing system

The above bridge deck is being finished on a skew using the three-point finishing system.




C-450 graphic

An overhead drawing of a GOMACO C-450, shows how the undercarriage is parallel to the rails with the machine set up for a skewed project.







GOMACO’s Patented Three-Point Finishing System

With the GOMACO patented three-point finishing system, the auger serves to level the concrete, the cylinder consolidates and finishes the concrete, and the float pan seals and textures the surface.

Using the 10 inch (254 mm) diameter auger, the same diameter as the cylinder, assures proper leveling and grade preparation for the finishing cylinder. The auger is hard faced for a greater life span. The auger and cylinder are adjustable in height on-the-go by raising or lowering the front elevation jacks.

The final step in the three-point finishing method is the 25 inch (635 mm) by 22 inch (559 mm) GOMACO float pan, which follows the cylinder and seals and textures the surface. Adjustable, double, 10 inch (254 mm) diameter cylinders and 7.75 inch (197 mm) augers and a double float pan are available.



three point finishing system

This three-point finishing system consists of the adjustable augers, double-cylinders, and a float pan.








High-Production Finishing

The GOMACO finisher is equipped with adjustable augers, double-cylinders, and dual finishing pans to create a smooth finish. This machine was also equipped with the fogger system and an Astroturf drag for texturing on a 56 foot (17.07 m) bridge deck.






Worldwide Customer Support & Education

Our worldwide distributor network and corporate support team of concrete paving professionals always stand ready to serve and assist you. There is nothing we enjoy more than visiting with you about concrete paving and helping you increase your quality, production, and profits. We understand how important it is for you to make the right purchasing choice in a concrete finisher, the first time and everytime.

Our commitment to education, research, and customer satisfaction assures that you have the newest methods and technology for all your applications. Our GOMACO University instructors have provided classroom and hands-on training to thousands of contractors throughout the world. Whether it’s concrete placing, trimming, slipforming, concrete finishing, canal projects and unique waterway projects around the world, we have the machine for you. A fully staffed service department is always on call to help set up, operate, and check the performance of your machine. GOMACO Corporation markets equipment through a global network of distributors with office locations throughout the world.

GOMACO’s state-of-the-art facilities are located in Ida Grove, Iowa, U.S.A. GOMACO also has sales offices located in England, and a worldwide distributor network for sales and services. Only GOMACO offers a complete line of concrete paving and related support equipment. Over 50 different models are manufactured by a dedicated workforce of over 300 full-time employees.





More Reasons to Choose GOMACO Finishers


PTA - The power transition adjuster (PTA) allows for smoother operating for on-the-go crown adjustments. The PTA is designed to transfer the load throughout the frame.


power transition adjuster






Eight-Roller Carriage System - The eight-roller carriage system is designed to move smoothly through crown adjustments and rail joints on flat or crown finishing. Rollers are CNC-machined steel wheels with maintenance-free sealed roller bearings. Adjustment of all rail pinch rollers is quick and easy.


8 roller carriage system



8 roller carriage system






Features for the Operator’s Platform -
• The operator’s platform is designed for strategic positioning, providing excellent visibility for the entire finishing operation.
• Operator access from either the front or end of the machine.
• Easy access to the engine compartment.
• Better clearance for the carriage and attachments.
• It can be positioned at either end of the machine.


The operator’s platform is designed for safety and accessibility (see graphic below).


operator's platform







The operator on a GOMACO finisher can view where the carriage(s) and crew members are during paving to ensure efficiency and safety.








Double Float Pan - The double float pan with jack designed with complete interchangeable capabilities or additions to the finishing system setup. The common beam design allows for adjustment in applications with any number of finishing systems.


double float pan






Double Vibrating Cylinders - The vibrating double-cylinders compact the concrete while leveling it out during the finishing process. The vibrating cylinders are isolated from the machine, so only the cylinders receive the vibration and not the machine.


double vibrating cylinders






Rotating Stinger Vibrator Rotates 180 Degrees - The GOMACO stinger vibrator attachment automatically rotates 180 degrees at the end of each pass. This keeps the vibrator pulling through the material with the eccentric always trailing and provides vibration to the end of the pass. The angled vibrator allows for maximum depth consolidation. This single vibrator system eliminates the expense of a double vibrator system and the need for double hydraulics.


rotating stinger vibrator






Widening Jackmount Assemblies - Offset rollers balance the load on all four rollers to eliminate binding and to roll more efficiently. The widening jackmounts have better engagement since the rollers sit over the top edge of the angle iron. This helps hold the jackmounts in place and keeps them from moving back and forth on the frame. All jackmounts have built-in self-locking capabilities to lock the jack into place anywhere along the rail, and are designed for better weight distribution. Self-widening jackmounts can be turned into the optional power widening jackmounts for enhanced widening capabilities.

widening jackmount assemblies






Adjustable Augers -

adjustable augers

GOMACO’s adjustable auger attachment is designed to be attached ahead of the finishing cylinders for full strike-off control. Quick, easy, and accurate grade adjustments can be made with the adjustable augers. The double-wrap augers are 7.75 inch (197 mm) diameter by 24 inches (610 mm) long with a three inch (76 mm) pitch. The augers can be quickly adjusted to one inch (25 mm) above or below the finishing cylinders.






Vibrator Assembly -

vibrator assembly

The vibrator mounting assembly for the adjustable pan or rotary stinger vibrator is designed to be attached in any position. The pan vibrator can be quickly adjusted to one inch (25 mm) above or below the finishing cylinders.






Features Easy Operation, Ultimate Reliability, Enhanced Serviceably with Added Safety

GOMACO originated and patented the cylinder finisher concept in the early 1960s and pioneered the bridge deck finisher. Building on five decades of engineering and manufacturing experience, our engineers have designed the C-450 with the belief that the finisher is an example of the best getting even better. The C-450 features easy operation, ultimate reliability and value, and enhanced serviceability with added safety.



C-450 console

The GOMACO C-450 console.



fiberglass console

Fiberglass console shroud with easy access.




Easy Operation
• Operator enhanced monitoring of machine functions with panel mounted bogie and carriage circuit pressure gauges, oil filter restriction gauge, hydraulic oil temperature gauge, hour meter, and circuit gauges.
• Reorganized plumbing and hose routing for ease in setup and operation.
• Automatic advance is standard on the C-450 and automatically advances any pre-set distance at the end of each carriage pass.
• Self-widening will control the carriage travel distance through the use of proximity switches for widening or tapering of decks.
• Urethane coated wheels with removable flanges for multiple applications.
• Powered widening for maintaining crown position on tapered decks.
• Power transition adjusters (PTA) can be installed at pin-connected points and are hydraulically operated for on-the-go grade elevation changes.


Ultimate Reliability and Value
• Features the hydraulic plumbing with crimp-style hydraulic hoses with O-ring face seal fittings and adapters.
• The locking shroud also provides quiet operation and theft protection for security from vandalism.
• All previous style undercarriages and attachments will fit on the upper carriage of the C-450.
• The GOMACO frame design has been maintained for interchangeability with your existing C-450 framework.
• The C-450 features a 36 inch (914 mm) wheelbase for improved distribution of the wheel load.


Enhanced Serviceability
• The fuel tank has a large capacity for extended operation.
• Easy access to daily service points.
• Self-monitoring restriction gauge on oil filter to ensure proper maintenance and serviceability of the system.
• Features an environmentally friendly, industrial seven micron filter system with restriction gauge.
• All engine service points can be accessed from the right side of the console. The molded fiberglass engine shroud is lightweight and allows quick and easy access.


Added Safety
• Easy to remove roto-molded fenders to access bogie wheels and drive components.
• Emergency stop buttons are strategically located on both the console and carriage. Additional emergency stop buttons are available for providing optimal use for specific applications.
• Rear console exhaust is directed away from the operator.
• The operator’s station is positioned to provide high visibility of the entire operation.







For More Information


C-450 & SL-450 Cylinder Finishers

C-650, CP-650 & SL-650 Cylinder Finishers

C-750 & SL-750 Cylinder Finishers

CF-790 Canal Finisher

Download The Cylinder Finishers Brochure (PDF)

Download The GOMACO Full Line Brochure (PDF)