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Angle and Section Bending Rolls

Roundo offers the largest selection of angle and section bending machines on the market with over 25 different standard sizes, from the R-1, the smallest machine, to the R-21-S, the strongest section bending machine in the world! The machines are always more powerful and more heavily proportioned in terms of frame, shaft size, bearings and drive torque than machines from other suppliers. CNC controls and a wide array of options are available for all models.



Stability and Continuity

ROUNDO was formed in 1964, and has since delivered almost 16 000 machines to satisfied customers around the globe. This has provided a stability and continuity that is unique in our industry. ROUNDO is currently represented throughout the world. ROUNDO machines are world-renowned for outstanding performance, reliability and quality.

Dedication and Know-how

ROUNDO has a team of over 75 dedicated full-time employees. They are capable of shipping over 300 machines per year, of which 97% are exported around the world. ROUNDO engineers and technicians employ cutting-edge technologies and renowned Swedish technical skills and know-how. The result is products that represent quality, performance and reliability unique on the global market.


  • Heaviest Proportioned Frame – for added strength and rigidity
  • Largest Diameter Roll Shafts – to minimize deflection, improving results
  • Largest Roll Shaft Bearings – for greatest efficiency and long life
  • Highest Drive Torque – means fewer passes and less deformation
  • Greatest Bending Roll Force – generated by the rolls, providing the largest section modulus capacity
  • Most Powerful Guide Rolls – to efficiently take the twist out of the heaviest sections


R-1 to R-6 are basic machines for all types of section bending. The guide rolls are manually adjusted and fixed to the swing arms.

R-2-S to R-21-S offer enhanced versatility due to the unique design of the multi-directional hydraulic guide rolls and increased capacity.


The main frame on all ROUNDO bending machines is welded steel construction, machined and line bored using the heaviest components of any comparable machine for added strength and rigidity. ROUNDO is the only manufacturer who stress-relieves every frame after welding.

ROUNDO roll shafts are made from high-strength chrome-nickel alloy steel, and are the largest diameter shafts of any comparable machine. These heavily proportioned shafts help minimize deflection, resulting in improved bending. The roll shafts are journalled in oversized SKF roller bearings for greatest efficiency and long life. The standard tooling is a combination set for bending angles both leg-out and leg-in, flat bar on flat and on edge, T-bar stem-out and stem-in as well as stem-down, small square bar and even small solid round bar. Normally, no additional spacers are required.


Did you know Trilogy Machinery has a complete revitalization process for your ROUNDO Bending Roll?
Click HERE for more information!

ROUNDO angle bending machines provide the greatest drive torque of any comparable machine. Greater drive torque means the section can generally be rolled in fewer passes, often resulting in less deformation to the section being rolled. All three rolls are driven at all times. The rotation speed on all models is generally 23 feet/min, considerably faster than other comparable machines, and high speed packages are also available!

The two lower rolls are individually adjusted by hydraulic cylinders. The rolls are sized to allowROUNDO angle bending rolls to generate more bending power than any comparable machine, providing the largest section modulus capacity.

ROUNDO angle bending machines feature the largest, most powerful guide rolls available on the market. This allows them to take the twist out of the most massive sections within the capacity of the machine. The hardened steel guide rolls, including “leg-in” guide rolls, are standard on every model. 4-directional hydraulically powered Guide Rolls are standard on Models R2S to R4S and 6-directional hydraulically powered Guide Rolls are standard with Models R5S and larger.

ROUNDO machines can be found all across the world including over 4000 in North America alone. Our featured customers include a large percentage of Fortune 500 companies: Click for References.

Unlimited Capacity

The ROUNDO control systemshave practically unlimited capacity regarding the number of programs and the size of each program. The computer in the CNC system can be connected to the customer’s network, providing a simple means of data backup. The software can also be installed in an office PC, allowing finished bending programs to be created in advance. This allows the machine to be available for production for a longer period of time.


The ROUNDO wCNC² Control is a PC-based CNC control running under Microsoft ® XP,

providing an operator-friendly graphical interface. This highly advanced and powerful system can control up to 24 axes, including the main bending rolls, and any type of optional equipment. Also communication with peripheral units such as industrial robots or material handling systems is easily integrated in our unique system.

Always One Step Ahead

The ROUNDO wCNC² Control software includes a library of bending wizards to rapidly produce good parts. Even short runs can be efficiently rolled using this system. The CNC Control is available for all models.

The ROUNDO RLC/3 Logic Control System is a PLC based control system designed and developed normally for small section and plate bending machines. This system can control up to 7-axes and the possibility to use USB memory allows infinite number of bending programs.

The ROUNDO RLC/1 PositionControl System is a basic positioning control withpossibility to preset two values for each axis. The positioning control automatically stops the movement of the bending roll when the pre-set value is reached. The system is designed to make repetitive bends.


A few important questions to which you should demand answers before purchasing a plate or angle bending machine:

-Are there references from satisfied customers concerning service, life and quality?
There are over 4000 ROUNDO Bending Rolls in North America. Trilogy Machinery handles the parts, service and support for each one of them. We will gladly provide you with an extensive list of customers in your area for reference.

-Will the machine meet your present as well as your future needs?
Not only will the ROUNDO roll out last the competition but most can be upgraded with the latest CNC controls and equipment.

-To what extent is technical expertise, support and service provided?
If their answer is “We can ask the factory”, that should be an immediate indication to look elsewhere. The staff at Trilogy have more direct/hands-on experience than any other distributor in North America.

-What is the cost of the machine distributed over its expected service life?
While many competitors claim to save you money initially, over time the expense to maintain their machines may be drastic. ROUNDO is the most popular bending machine on the used market solely because of its PROVEN long service life.

Capacities and Specifications – Models R2S – R16S (Click Here for R1-R6)
Model Angle Leg- Out Angle Leg-In Flat Iron on Flat Flat on Edge Pipe * Beam Easy-Way Beam Hard-Way Diameter Rolls
R2S 2½ x 2½ x 3/8 2½ x 2½ x 5/16 5 x 1 2¾ x 3/4 2 5 N/A 8-5/8
R3S 3 x 3 x 3/8 3 x 3 x 3/8 6 x 1-1/4 3½ x 3/4 3 6 N/A 10
R4S 4 x 4 x 1/2 4 x 4 x 3/8 7 x 1½ 5 x 5/8 4 7 3 12¼
R5S/R52S 5 x 5 x 1/2 4 x 4 x 1/2 8 x 2 6 x 5/8 5 8 5 15
R6S/R62S 6 x 6 x 5/8 5 x 5 x 3/4 10 x 2 6 x 1½ 6 12 6 18
R7S/R72S 6 x 6 x 1 6 x 6 x 1 12 x 2½ 8 x 1¼ 8 14 8 22
R8S 8 x 8 x 1 8 x 8 x 3/4 16 x 3 10 x 1¼ 10 18 10 25
R9S 8 x 8 x 1-1/8 8 x 8 x 1 20 x 3 10 x 2½ 12 21 12 29
R10S 8 x 8 x 1-1/8 8 x 8 x 1-1/8 20 x 3½ 10 x 3 12 24 12 32
R11S 8 x 8 x 1¼ 8 x 8 x 1¼ 20 x 4 12 x 3 16 27 18 32
R13S 8 x 8 x 1¼ 8 x 8 x 1¼ 22 x 4 16 x 2-3/8 20 36 24 32
R14S 8 x 6 x 1 8 x 6 x 11 12 x 6 10 x 4 14 24 12 33
R15S 8 x 8 x 1¼ 8 x 8 x 1¼ 40 x 6 20 x 5 24 40 30 33
R16S 8 x 8 x 1¼ 8 x 8 x 1¼ 40 x 7 20 x 6 26 44 44 33

Capacities and Specifications – Models R1 -R6 (Click here for R2S-R16S)
Model Angle Leg- Out Angle Leg-In Flat Iron on Flat Flat on Edge Pipe * Diameter Rolls Motor HP @ 440V Weight
R1 2 x 2 x 3/16 2 x 2 x 3/16 5/8 x 4 3/8 x 2 1-1/2 6-7/8 2.5 1500#
R2 2 x 2 x 5/16 2 x 2 x 1/4 5/8 x 6 1/2 x 2-1/4 2 7-1/2 4 1765#
R3 3 x 3 x 5/16 2½ x 2½ x 5/16 3/4 x 8 5/8 x 3 2-1/2 9 5 2800#
R4M 3½ x 3½ x 3/8 3 x 3 x 3/8 1-3/16 x 8 3/4 x 4 3 11 9 5300#
R4H 3½ x 3½ x 3/8 3 x 3 x 3/8 1-3/16 x 8 3/4 x 4 3 11 9 5300#
R5 4½ x 4½ x 1/2 4 x 4 x 3/8 1-3/16 x 10 3/4 x 5 4 14-1/4 12 7700#
R6 5 x 5 x 5/8 5 x 5 x 1/2 1-1/2 x 10 1-1/4 x 5 6 17-3/8 17.5 11600#

* -Schedule 40,except Schedule 80 for R10S, R 14S and R16S – All dimensions in Inches unless otherwise noted

Additional models available on request

<br>20' In-feed table with squaring rollers <img src=image/plate4.jpg border=1><br>Touch-screen controller featuring multiple programs <img src=image/plate3.jpg border=1><br>Linear-Rail mounted squaring arm <img src=image/plate2.jpg border=1><br>Knurled drive roller featuring dual proximity sensors for accurate plate positioning <img src=image/plate1.jpg border=1><br>Mitsubishi Servo Motor Driven featuring dual linear encoders <br>Optional Hydraulic Plate Shear Hold-Down <br>Optional Hydraulic Angle Shear Hold-Down
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