1. Product overview

Quick answer: MAGEON MG300B is a 3.0-4.0-ton steel track crawler undercarriage with a 300 mm track width and a 1895 mm frame length. It is built to the host machine's mounting interface rather than selected from a catalogue, and every assembly ships with material traceability and a video outgoing inspection.

The 1.5 to 4 ton class is the volume segment of the crawler market — mini excavators, small drilling rigs and compact loaders. At this tonnage the chassis has to serve three different duty cycles on the same machine, which is why modularity matters more than absolute performance.

MG300B is a 3.0-4.0-ton steel track chassis with a 300 mm track width and a 1895 mm frame length. Compared with the model below it in the series the frame grows by -135 mm in length and the track widens by 0 mm, which is the usual upgrade path when the machine gains payload or works on softer ground.

2. Key specifications

3. Design features

Modular Frame, One Chassis for Multiple Duties

Track width, frame length, track gauge and drive type are adjusted per machine rather than per catalogue. A single platform family covers mini excavators, anchor rigs, water-well rigs, core drilling rigs and mobile crushers.

Hydraulic Drive with Controllable Response

Travel speed of 2-4 km/h with matched hydraulic parameters gives smooth travel and controlled start-stop. On small machines the operator works close to the machine, so predictable response matters more than top speed.

Steel Track and Rubber Pad Combination

Steel tracks carry the load while bolt-on rubber pads protect asphalt and concrete. This is the configuration for equipment that relocates frequently or runs on paved surfaces.

Compact Proportions for Constrained Sites

Frame dimensions from 1895 to 2030 mm length keep the machine workable in tunnels, trenches and narrow industrial yards without a dedicated transport chassis.

4. Typical machine applications

Common machine types matched to this class:

· Mini excavators

· Mini piling machines

· Anchor drilling rigs

· Water-well drilling rigs

· Core drilling rigs

· Jet grouting rigs

· Mobile crushers

· Small aerial work platforms

5. Series overview

The Small Crawler Undercarriage series covers 5 models from MG150 to MG300B. The table below lists the full series so the MG300B can be positioned against adjacent tonnage classes before a specification is fixed.

6. Dimension reference

The A/B/C/E dimensions above define the chassis envelope and D defines ground contact width. A longer A improves stability and reduces frame bending under load; a wider D lowers ground pressure but widens the machine. Both are selected against the host machine's weight distribution and its installation envelope, not against the catalogue.

7. Selection notes for this tonnage

· In the small tonnage class, the balance between steel and rubber track is decided by relocation frequency, not by load — the load is already within the design envelope.

· Jet grouting rigs and core drills generate continuous downforce while the mast is working, so frame bending stiffness at the front idler position is the limiting factor.

· Mobile crushers on paved plant yards should specify rubber pads; on quarry floors with sharp rock, steel tracks with heavier plate section last considerably longer.

8. How a custom order is executed

9. Frequently asked questions

Q1: When should I choose MG300A over MG300B?

A: MG300A is the rubber-track version and MG300B the steel-track version of the same 3-4 ton class. Choose A for paved surfaces and relocation, B for rock, rubble and continuous heavy duty.

Q2: Can MG250 be upgraded to a wider track?

A: Track width is a build option. Moving from 250 mm to 300 mm on the same frame length increases ground contact and reduces ground pressure, provided the frame and drive package are re-verified for the added width.

Q3: Does the frame width change with the track width?

A: Yes. The overall width C in the specification table includes the track plus the frame overhang. A wider track pushes the frame out, which matters when the machine has a width limit for transport.

10. Customization and OEM service

MAGEON supplies the MG300B class as a complete assembly and accepts customer drawings or measured samples for interface-controlled builds. The following parameters are configurable within the model envelope:

· Track width and frame length adjusted to the machine envelope

· Drive type: hydraulic, electric or mechanical

· Travel gearbox: single-speed or dual-speed

· Integrated slewing bearing for 360-degree upper-structure rotation

· Custom mounting flange, bolt pattern, drive shaft height and hydraulic interface

· Colour: black or specified

Next step: send the machine weight and load distribution, the mounting interface dimensions, the required travelling speed, the ground conditions and the drive configuration, and MAGEON returns a configuration and price within one working day of a technical enquiry.