Koike Aronson MD30 Welding Positioner

Name: Koike Aronson MD30 Welding Positioner – Brochure & Quote
Brand: Koike Aronson
SKU: MD30

Mid-size tilt/turn positioner with powered 135° tilt

The Koike Aronson MD30 is a 3,000 lb tilt/turn/rotate welding positioner from the US-built MD Series. It offers powered forward tilt to 135 degrees and variable-speed rotation, both driven by AC brake motors under variable frequency drive control with over-travel protection. An internal geared slew ring gives smooth, controlled rotation, the electrical enclosure is dust-tight NEMA 12, and the unit runs from a 115 V single-phase supply, which makes it easy to install in most fabrication shops.

The square worktable has radial T-slots, a 2-3/4 in pilot for part location and a through-hole for purge routing, and a 550 A sliding ground shoe carries welding current. A low-voltage hand pendant with built-in E-stop on a 20 ft cable controls tilt, rotation and speed.

Technical specifications

Parameter	Specification
Manufacturer / model	Koike Aronson / MD30 (MD Series)
Rotation rating	3,000 lb at 4 in eccentric; 2,625 lb at 6 in; 1,968 lb at 8 in
Tilt rating (by CG height)	3,000 lb at 4 and 6 in; 1,970 lb at 12 in; 1,470 lb at 18 in; 1,170 lb at 24 in; 970 lb at 30 in; 830 lb at 36 in
Tilt torque / rotation torque	34,500 lb-in / 15,750 lb-in
Tilt	135° in 50 s; 0.5 HP motor
Rotation speed	0.20 – 2.0 RPM (AC drive); 1 HP motor
Table	30 x 30 in, 1-3/4 in thick; (4) 9/16 in slots; 2-3/4 x 1/2 in pilot; 1-3/8 in through-hole
Maximum clamping diameter	38 in
Inherent overhang	5-1/2 in
Welding ground	550 A single ground shoe
Table flat height	32-1/2 – 44-1/2 in (12 in lift in 4 in steps)
Rotation axis height	27 – 39 in
Overall machine (W x L)	43 x 58-1/4 in
Approximate weight	1,440 lb (653 kg); shipping 1,700 lb
Primary voltage	115 V / 1 ph / 60 Hz

MD Series models compared

Model	Rating at 4 in	Table	Tilt time to 135°	Rotation	Supply
MD15	1,500 lb	24 x 24 in	22 s	0.23 – 2.3 RPM	115/1/60
MD30	3,000 lb	30 x 30 in	50 s	0.20 – 2.0 RPM	115/1/60
MD50	5,000 lb	36 x 36 in	40 s	0.20 – 2.0 RPM	460/3/60

The tilt rating falls quickly as the centre of gravity rises above the table, so tall fixtures should be checked against the CG table rather than the headline capacity. Options include a variable-diameter tachometer HMI that shows RPM and surface speed and accepts speed targets, a radio-controlled pendant, welding chucks and grippers, and forward/reverse, variable-speed or wireless foot switches.

Choosing between the three sizes is mainly a question of load and CG height. The MD15 suits lighter assemblies on a 24 in table and also runs from 115 V. The MD30 doubles the rated load and adds a larger 30 in table with a 38 in maximum clamping diameter, while keeping single-phase supply. The MD50 moves to 460 V three phase, a 36 in table and a 47 in clamping diameter, with a higher tilt torque of 67,500 lb-in. All three share the pin-through height adjustment, NEMA 12 electricals, 20 ft pendant cable and 550 A ground shoe, so operators trained on one size can work on the others without retraining.

Documents and quotation

The Koike MD Series literature is attached under the documents tab. Browse Welding Robots & Automation for other positioners.

For a quotation, state the model, part weight and CG height, required options and site voltage.

Koike Aronson, Inc. of Arcade, New York, builds cutting machines, welding positioning equipment, portable cutting and welding carriages, and gas equipment. The company was established in 1985, when Japan's Koike Sanso Kogyo acquired the Aronson Machine Co.. Seven Star LLC is an independent supplier in Muscat that lists the IK-12 Beetle and sources Koike Aronson portable machines and positioning equipment.

Koike Aronson product groups

The program spans CNC plasma, oxy-fuel, laser and waterjet cutting machines; portable track-guided cutting and welding carriages such as the IK-12 and IK-72 series; and positioners, turning rolls, manipulators and head and tailstocks for welding work. Gas apparatus, machine torches and cutting tips are offered alongside.

Ordering Koike Aronson equipment: what we need

Give the machine model and kit part number, the fuel gas you use and the site power supply. For positioning equipment, add the workpiece weight, centre of gravity and diameter. We check the selection against Koike documentation and provide the manufacturer's literature on request.

Frequently Asked Questions