ROUNDO Production Bending Rolls

For high production of cylinders and tubes, the best solution is very often the ROUNDO Type Pm Production Bending Rolls

The Type Pm machine is designed to prebend and roll the plate into a completed cylinder in one pass, and in a very short cycle time! The two lower rolls are fixed-positioned, journalled in ball or roller bearings, and driven by a geared motor equipped with a brake. On most sizes, the lower rolls are equipped with support rolls under their mid-point to reduce the deflection of the rolls under load. The interchangeable top roll unit consists of an inner non-rotating shaft with journalled rolls for each different rolling diameter. Because of this design there is less load on the inner shaft and on the interchangeable top roll than there would be on a conventional solid roll, making it possible to roll to smaller diameters. One end of the inner shaft is fixed in the machine frame. The other end is supported by the yoke of the drop end, which is pneumatically operated to allow the finished cylinder to be automatically ejected. The upper part of the machine frame moves up and down during rolling and is powered by one or more hydraulic cylinders (depending on machine size).

ROUNDO Model Pm-0/500

ROUNDO Model Pm-1/500

Key benefits to the Type Pm design…

Very short rolling times

Excellent roundness tolerances
and the shortest flat ends of any bending roll

Less dependence on plate quality than other machine types

No demand for skilled bending operators to run the machine

High machine performance and low maintenance costs

Interchangeable top rolls are quick and easy to change

Special Type Pm Machines also available

ROUNDO Type Pm Production Rolls are also available with vertical roll shafts
ideal for rolling narrow strips generally up to about 8" wide.

ROUNDO Type Pm-S

ROUNDO Type Pm-V

The Type Pm-S machines are for heavier material up to about 1/2" thickness. At the completion of the automatic rolling cycle the part is available to be removed from the machine via overhead crane or other lifting method if too heavy for the operator to handle.

The Type Pm-V machines are for thinner material through 10 ga. and feature a cantilevered top roll shaft supported only on the top. At the completion of the automatic rolling cycle the part will fall off the top roll onto an optional conveyor or into a box.

Capacities and Specifications

Model

Capacity

Bending Diameters
(mild steel)

Bottom
Roll

Top
Shaft

Motor HP

Min

Max

Drive

Hyd.

Pm-0/250

10" x 5/32"

16"

1.97"

Pm-0/500

20" x 10 ga.

16"

1.97"

Pm-0/750

30" x 1/8"

16"

1.97"

Pm-0/1000

40" x 14 ga.

16"

1.97"

Pm-1/250

10" x 1/4"

20"

3.46"

2.75"

1.5

Pm-1/500

20" x 3/16"

20"

3.46"

2.75"

1.5

Pm-1/750

30" x 5/32"

20"

3.46"

2.75"

1.5

Pm-1/1000

40" x 1/8"

20"

3.46"

2.75"

1.5

Pm-1/1250

48" x 12 ga.

20"

3.46"

2.75"

1.5

Pm-1/1500

60" x 14 ga.

20"

3.46"

2.75"

1.5

Pm-2/250

10" x 5/8"

24"

4.72"

4.33"

Pm-2/500

20" x 3/8"

24"

4.72"

4.33"

Pm-2/750

30" x 5/16"

24"

4.72"

4.33"

Pm-2/1000

40" x 9/32"

24"

4.72"

4.33"

Pm-2/1250

48" x 1/4"

24"

4.72"

4.33"

Pm-2/1500

60" x 3/16"

24"

4.72"

4.33"

Pm-2/2000

72" x 1/8"

24"

4.72"

4.33"

(Other machine sizes available by request)

Standard Equipment

Automatic working cycle including pneumatic ejection device
Two lower rolls driven via geared motor with brake
Hydraulic adjustment of the top roll
Quick changeable top roll system including inner shaft and lifting bar/roll
Ball and roller bearings in all main journals
Pneumatic operation of the end yoke
Pressure relief valve and gauge for adjustment of the top roll working pressure
Portable push button control
Complete electric equipment including emergency stop

Optional Equipment

Special Control Panel including digital limit switch for upper position of top roll, timer settings for auto cycle, and pressure setting
Infeeding Table (motorized or non-motorized available)
Automatic Infeeding System
Two-hand Start Control
Additional Top Rolls