Chicago Dreis & Krump Hydraulic power metal bending & folding brake machines.  CLICK FOR HOMEPAGE.

Chicago Dreis & Krump Hydraulic and Mechanical Powered Leaf Brake machines with push button controls to bend metal into many shapes including box and pan shapes

American Machine Tools Company is accedited by the Better Business Bureau! Click to verify.

We accept credit cards for up to $10,000.

Below you will see our hydraulic leaf brake machines for bending metal up to 1/4 inch [6.4mm] thick. Scroll way down to see our mechanical power leaf brake machines that have capacity to bend steel up to 3/4" thick. All these machines clamp the metal in place and use a hinged apron to fold the metal until the desired angle is reached. They are easier to operate than press brakes and thought to be safer. The forming principle is similar to a Sheet Metal Hand Brake. A box and pan capable version is available to avoid having the bent sides hit against the clamping bar when the 3rd and 4th sides are being bent. This is done by removing a clamping bar "finger" at each end of the box since the clamping bar is divided up into many assemblies called "fingers". An insert bar is used to form close offset ("zig-zag") bends.

Click for chart of tensile strengths for aluminum and stainless steel to compare with mild steel

Click for a Bend Radius Chart for aluminum and stainless steel

Hydraulic Powered Metal Folding Machines

Chicago Dreis & Krump hydraulic sheet metal folding brake machine

A standard metal folding machine needs no die changes. The machine bed supports the sheet metal, not the worker. This makes it less labor intensive than a press brake and therefore is great for short-run, and just-in-time metal bending jobs. Extra thick aluminum sheet metal can be bent. Powerful bends can be made in 10 gauge steel up to 8 feet long. Huge sheet metal panels up to 14 feet long can be bent!

Chicago Dreis & Krump adds hydraulic power with push buttons and foot pedals to convert its famous sheet metal hand brake machines into very productive metal folding machines. You can save time, money and your back with the push button hydraulic power. Two man jobs become one man jobs. They are so easy to operate. A simple to use bend angle adjustment dial completely eliminates the need for tooling and related time consuming setups. This machine can also form your coated or polished metal without a scratch. These durable, labor saving, high performance work horses are totally self contained. They will accurately bend standard or special design forms and can even make 1/4" reverse bends on light gauge steel with the optional 1/4" insert bar.

Click to Watch a Video

Model Number Bend
Length
Capacity Motor
HP
Weight
Lbs
Mild Steel Stainless
HSB-812
Request Quote
97" 12 gauge
(.105")
16 gauge
(.06")
3 4000
HSB-810
Request Quote
97" 10 gauge
(.135")
14 gauge
(.075")
5 6300
HSB-1014
Request Quote
121" 14 gauge
(.075")
18 gauge
(.048")
3 4500
HSB-1012
Request Quote
121" 12 gauge
(.105")
16 gauge
(.06")
5 6525
HSB-1010
Request Quote
121" 10 gauge
(.135")
14 gauge
(.075")
5 7500
HSB-1218
Request Quote
145" 18 gauge
(.048")
22 gauge
(.030")
3 4900
HSB-1422
Request Quote
169" 22 gauge
(.030")
26 gauge
(.018")
3 5500

Standard Equipment:

  • Removable Nose Bar
  • Bolted Bottom Bar
  • Compact Hydraulic Power Unit
  • Angle Bar
  • Insert Bar
  • Oil Level Sight Gauge

Electric Foot Switch - Clamps and unclamps Top Leaf. Allows operator mobility when loading and unloading material.

Bend Angle Dial Adjustment- Adjustable cam and scale that read in degrees, actuates an electric limit switch for bend angle control and repeatability of bends.

Material Thickness Dial Adjustment - Reference scale for speedier set up when adjusting clamping pressure.

Back Gauge - 25 1/2" travel, rack and pinion type with hand wheel adjustment on right side of machine. Inch/Cm scales.

Inch Control - Bending leaf up/down pushbuttons allow complete operator control of the bending leaf motion.

Automatic Cycle - Actuating the "Automatic Pushbutton" clamps the top leaf, raises the bending leaf to the preset bend angle dial adjustment setting, lowers the bending leaf, unclamps the top leaf.

Options Available:

  • Insert Bar - 1/4 inch (for closer offset bends)
  • Radius Formers - for forming gutters, mouldings, and prototypes from thin sheet metal.
  • Electronic push button operated Back Gauge with digital readout (see directly below).
Digital Readout for power back gauge Electric Powered Back Gauge

Hydraulic Metal Bending Box & Pan Brake Machine

Chicago Dreis & Krump hydraulic box and pan sheet metal bending brake machine

With fingers for box and pan type and optional radius forming to depth of up to 6"

Click to see video of this hydraulic metal bending machine

Click for our instructions how to make a box out of sheet metal

Options Available:

  • Radius Nose Bars up to 1.5" radius (great for aluminum aircraft work) -see picture below.
  • Extension Fingers (to form rigid inside corners with a return flange across the top) -see below.
  • Open End Fingers (to form tubes of triangular, square, rectangular, or tapered shape) -see below.
  • Insert Bar - 1/4 inch (for closer offset bends)
  • Radius Formers - for forming gutters, mouldings, and prototypes from thin sheet metal.
  • Electronic push button operated Back Gauge with digital readout (see directly below).
Digital Readout for power back gauge Electric Powered Back Gauge
Model Number Bend
Length
Capacity Motor
HP
Weight
Lbs
Mild Steel Stainless
HBPU-412-6
Request Quote
48" 12 gauge
(.105")
16 gauge
(.06")
2 2800
HBPU-612-6
Request Quote
72" 12 gauge
(.105")
16 gauge
(.06")
2 3300
HBPU-812-6
Request Quote
96" 12 gauge
(.105")
16 gauge
(.06")
3 4700
HBPU-810-6
Request Quote
96" 10 gauge
(.135")
14 gauge
(.075")
5 6400
HBPU-1014-6
Request Quote
120" 14 gauge
(.075")
18 gauge
(.048")
3 5500
MODEL Width and number of 6 inch long Fingers
3" 4" 5" 6" Total
HBPU 412-6 5 2 5 0 12
HBPU 612-6 5 4 7 1 17
HBPU 810-6 5 6 9 2 22
HBPU 812-6 5 6 9 2 22
HBPU 1014-6 6 10 10 2 28
Image of optional Radius Nose Bars, Extension Fingers and Open End Fingers for use with your Hydraulic Power Leaf Brake machine

Optional Radius Nose Bars are available for bending your metal around a radius, which is useful for bending aircraft aluminum. Extension Fingers are used to form inside corners with a return flange across the top. Open End Fingers are used to form tubes of triangular, square, rectangular, or tapered shape.

Hydraulic Powered Metal Bending Machine

capable of bending 3/16 or 1/4 thick steel up to 10 feet long

Chicago hydraulic powered metal bending machine for sheet metal and 1/4 inch thick steel plate

Buy it equipped with NC Controls for back gage and bend angle. This is the next best thing to owning a Press Brake but without the high price or tool changes. The Chicago Hydraulic Powered Leaf Brake will bend up to 1/4 inch thick steel but it can also bend sheet metal without changing the tooling! Model HBP is designed to make box shapes and pan shapes up to 6 inches deep. This machine is easy to use because it works similar to a hand brake machine.

Click to see video of the machine

Features: Adustable clamping pressure, adjustable open height, bending leaf gap adjustment, hand wheel operated manual rack & pinion type back gauge with positioning bar or optional numerically controlled back gauge with digital readout. Bend position and bend angle can be stored and changed in the NC control panel. The box/pan capable version has removeable fingers. Minimum reverse bend is 1.18" on 3/16" capacity machine. Minimum reverse bend is 1.37" on 1/4" capacity machine.

Model Number Bend
Length
Capacity Motor
HP
Weight
Lbs
Mild Steel Stainless
HSB-8187
Request Quote
97" 3/16
(.187")
11 gauge
(.105")
7.5 10500
HSB-8250
Request Quote
97" 1/4
(.250")
3/16
(.187")
10 13200
HSB-10187
Request Quote
121" 3/16
(.187")
11 gauge
(.105")
7.5 11400
HSB-10250
Request Quote
121" 1/4
(.250")
3/16
(.187")
10 14900
Below are the same Machines but they're built with box/pan making capability
HBP-6187-6
Request Quote
73" 3/16
(.187")
11 gauge
(.105")
7.5 7000
HBP-6250-6
Request Quote
73" 1/4
(.250")
3/16
(.187")
10 8160
HBP-8187-6
Request Quote
97" 3/16
(.187")
11 gauge
(.105")
7.5 11200
HBP-8250-6
Request Quote
97" 1/4
(.250")
3/16
(.187")
10 13600
HBP-10187-6
Request Quote
121" 3/16
(.187")
11 gauge
(.105")
7.5 12100
HBP-10250-6
Request Quote
121" 1/4
(.250")
3/16
(.187")
10 15600

Power Leaf Brake

Chicago Dreis & Krump heavy duty power leaf brake - standard and box & pan to bend up to 3/4 thick steel plate

Bend up to 3/4 thick steel plate! Standard metal bending, or Box & Pan bending, in regular, medium and heavy duty capacities. Expensive, but every model we sell includes power clamping and motorized top leafs for maximum productivity and no need for die sets. Everything is solidly built to last for many many years, from the welded steel plate frames with box type support to the powerful gear head motors with built-in magnetic brakes. These machines offer the kind of staying power and efficiency that includes radius bending abilities usually associated with roll forming equipment or stamping presses. Our Box and Pan versions are just as rugged and stable as our standard models. The sectional, adjustable, finger assemblies even let you easily bend five sided boxes up to 8" deep, and shapes such as tubes. This mechanical Power Leaf Brake is totally made in USA.

Over $100,000

Power Leaf Brake Features:

  • Power Unit - Powerful, cool running direct drive gear head motor is equipped with built in magnetic brake
  • Drive System - Self aligning main shaft bearings assure smooth power transmission. Rack and pinion gear
  • Power Clamping - Dual air cylinders actuate eccentric clamping links to secure piece part for accurate bending.
  • Power Top Adjustments - Motor adjusts top leaf accurately to thickness of work piece for correct bending radius.
  • Bend Stops - Micro limit switch controls bending leaf travel for repeatable angle bends on the finished work.
  • Operator Controls - Dual operator stations placed at sides of unit for clear view of the qwork area.

Straight Plate Bending Machines

Model Number Bending
Length
Capacity Min flange
on capacity
material
Motor
HP
Weight
Lbs
Dimensions
Length Max Width Max Height Base Length Table Height Base Width
Regular Duty
PB-8187 96" 3/16 1 1/2" 5 6550 9'8" 8' 6'1" 9' 3'11" 3'7"
PB-8250 96" 1/4" 2" 7 1/2" 9625 10' 8'6" 6'4" 9'3" 3'10" 4'1"
Medium Duty
PB-10135 120" 10 gauge 1" 5 8140 11'8" 8' 6'1" 11' 3'11" 3'7"
PB-10187 120" 3/16 1 1/2" 6 1/4 11135 12' 8'6" 6'4" 11'3" 3'10" 4'1"
Heavy Duty
PB-8375 96" 3/8" 2 1/2" 7 1/2 17000 11'8" 10' 7'5" 9'4" 4'2" 4'8"
PB-8500 96" 1/2" 4" 10 22000 11'8" 10'10" 7'10" 9'5" 4'3" 5'7"
PB-8750 96" 3/4" 6" 20 25000 12" 11' 7'11" 11'2" 4'2" 5'7"
PB-10250 120" 1/4" 2" 7 1/2 18700 13'8" 10'6" 7'5" 11'4" 4'2" 4'8"
PB-10375 120" 3/8" 2 1/2" 10 22800 13'10" 10'6" 7'6" 11'5" 4'3" 5'7"
PB-10500 120" 1/2" 4" 15 24000 13'10" 10'6" 7'6" 11'5" 4'3" 5'7"

Box & Pan Bending Machines with 8" Finger Extensions

Model Number Bending
Length
Capacity Min flange on capacity
material
Motor
HP
Weight
Lbs
Dimensions
Length Max
Width
Max
Height
Base
Length
Table
Height
Base
Width
Medium Duty
PBP-8135-8 96" 10 Ga 1" 3 7000 9'8" 8' 6'4" 9' 3'11" 3'7"
PBP-8187-8 96" 3/16 1 1/2" 5 7600 9'8" 8' 6'4" 9' 3'11" 3'7"
PBP-8250-8 96" 1/4" 2" 7 1/2" 10750 10' 8'6" 6'8" 9'3" 3'10" 4'1"
PBP-10135-8 121" 10 Ga 1" 5 9400 11'8" 8' 6'4" 11' 3'11" 3'7"
PBP-10187-8 121" 3/16 1 1/2" 5 12500 12' 8'6" 6'8" 11' 3'11" 3'7"
Heavy Duty
PBP-10250-8 121" 1/4" 2" 7 1/2 19000 13'8" 10' 7'9" 11'4" 4'2" 4'8"

Finger Assortments

Model Width and Number of 8" long Fingers
3" 4" 5" Total
PBP-8135-8 8 8 8 24
PBP-8187-8 8 8 8 24
PBP-8250-8 8 8 8 24
PBP-10135-8 10 10 10 30
PBP-10181-8 10 10 10 30
PBP-10250-8 10 10 10 30