Buying the wrong tonnage is the most expensive mistake in machine skate selection. Choose too small and you stall mid-move with a loaded skate that will not budge. Choose too large and you pay for capacity you never use. This guide walks you through the exact method MHBY engineers use to match a 20-50 ton battery powered machine skate to your heaviest, longest, or most awkward load.
Traction Capacity vs. Load Capacity: Read These Two Numbers Separately
Every battery powered machine skate carries two ratings, and confusing them is how most sizing errors start:
- Traction capacity — how much horizontal pull the drive wheels can deliver (20T, 25T, 30T, 35T, 40T or 50T). This is the number that determines whether the skate can move your load at all.
- Load capacity — how much vertical weight the skate frame can safely carry while rolling (10T, 12.5T, 15T, 17.5T, 20T or 25T). This is the number that determines whether the frame and wheels hold up.
Rule of thumb: your machine’s weight must be below the skate’s load capacity, and the skate’s traction capacity should be roughly 2× your machine weight to overcome rolling resistance on typical factory floors. A 20-ton CNC, for example, wants a skate with at least 40T of traction and 20T+ of load capacity — which means the MH40 series at minimum.
The 5-Step Sizing Method for 20-50 Ton Machinery Moves
Use this sequence every time. It takes 15 minutes and eliminates guesswork.
Step 1: Weigh your machinery honestly
Get the actual shipping weight, not the catalog “approximate” number. For CNC machines, lathes, presses, injection molding machines and transformers, check the nameplate or the last rigging report. If you have to estimate, add 10% for coolant, tooling, fixtures and accessories still mounted on the machine.
Step 2: Check both ratings against your load
Cross your machine weight with the two ratings above:
| Your machine weight | Minimum traction capacity | Minimum load capacity | Recommended MHBY model |
|---|---|---|---|
| 10 tons (22,000 lb) | 20 tons | 10 tons | MH20B / MH20P / MH20L |
| 12.5 tons (27,500 lb) | 25 tons | 12.5 tons | MH25B / MH25P / MH25L |
| 15 tons (33,000 lb) | 30 tons | 15 tons | MH30B / MH30P / MH30L |
| 17.5 tons (38,500 lb) | 35 tons | 17.5 tons | MH35B / MH35P / MH35L |
| 20 tons (44,000 lb) | 40 tons | 20 tons | MH40B / MH40P / MH40L |
| 25 tons (55,000 lb) | 50 tons | 25 tons | MH50B / MH50P / MH50L |
Step 3: Apply the floor-condition margin
The 2× traction rule assumes smooth, level concrete. Adjust upward if your path includes:
- Expansion joints, cracks or rough patches — add 10-15% traction margin
- Slight inclines or ramps (up to 2°) — add 20% traction margin
- Oil, coolant residue or epoxy coatings — add 10% traction margin
- Outdoor transitions or dock plates — step up one full size (e.g. from MH40 to MH50)
Step 4: Measure the path, not just the machine
A skate that fits your load but not your doorway is useless. Confirm:
- Insertion height — MHBY skates accept 100-210 mm claw jack insertion heights; verify your machine has at least 50-100 mm of clearance underneath for the skate to slide in
- Turning radius — the narrowest point on your travel path (doorways, aisle corners, between machines) must exceed the skate’s minimum turning radius
- Floor loading — check that your floor slab can take the point load of the skate wheels (typically 3-5× the distributed machine weight)
Step 5: Decide between a single skate and a synchronized train
Within the 20-50T range, a single skate handles most moves. You need a synchronized multi-skate train when:
- Your machine exceeds 25 tons (the largest single-skate load capacity)
- The load is long and narrow (lathes, planers, extrusion lines) and needs front and rear support
- The load is wide (transformer housings, generator stators) and needs left-right stability
- You want continuous operation — one skate recharges while the other keeps working
MHBY skates support up to 4 units paired to a single wireless remote. For loads over 25 tons, the standard setup is one powered skate at the front plus two straight-line auxiliary wheels (W6SP or W8SP) at the rear — this 3-point train handles 50-100 tons with a single operator. For very heavy or wide loads, use two powered skates side by side plus two auxiliary wheels.
20-50 Ton Battery Powered Machine Skates: Model-by-Model Comparison
The MHBY lineup splits into three series, all covering the full 20-50 ton range:
| Model | Traction capacity | Load capacity | Best for |
|---|---|---|---|
| MH20B | 20 tons | 10 tons | Small CNCs, drill presses, light molds |
| MH25B | 25 tons | 12.5 tons | Mid-size CNCs, small presses |
| MH30B | 30 tons | 15 tons | Standard machining centers, injection molds |
| MH35B | 35 tons | 17.5 tons | Large CNCs, heavy presses |
| MH40B | 40 tons | 20 tons | Heavy machining centers, transformer cores |
| MH50B | 50 tons | 25 tons | Largest single-skate loads, ship engine parts |
The Basic (MH-B) series covers the same tonnage range at entry level. The Professional (MH-P) series adds industrial wireless remote and 2-year warranty for production-floor duty cycles. The Lift (MH-L) series integrates a lifting function so you can raise the machine, position the skate, and lower — all from the remote, no separate claw jack needed.
Which series fits your workshop?
- Choose Basic if you relocate machines a few times a year, work on smooth indoor floors, and want the lowest entry cost. Same 20-50T range, same frame, simpler remote.
- Choose Professional if you move machines weekly or daily, need longer runtime, and want the industrial-grade remote with better ergonomics and range.
- Choose Lift if you regularly work with machines that lack convenient jacking points, or if you want to eliminate the separate claw jack step entirely. The integrated lift saves 10-15 minutes per move.
When One Skate Is Not Enough: Trains and Synchronized Operation
Even within the 20-50T range, some loads exceed what a single skate can handle safely. The standard solution is a synchronized train:
- 3-skate train (most common) — one powered skate at the front, two W6SP/W8SP straight-line auxiliary wheels at the rear, connected by a rigid bar. Handles 50-100 tons with one operator.
- 4-skate synchronized train — two powered skates (front-left + front-right) plus two auxiliary wheels (rear-left + rear-right). For loads over 50 tons or very wide machines.
All MHBY skates in the 20-50T range support synchronous operation from a single remote. The drive wheels stay phase-locked, so the load travels as a single rigid unit with no twisting or slipping.
FAQ: 20-50 Ton Selection Questions
Q: Can I use a 50T skate for a 10-ton machine?
A: Yes, but it’s inefficient. You’ll pay more upfront and get slower acceleration. Better to match the skate to your heaviest regular load and keep a smaller unit for light work.
Q: What if my machine is between two sizes?
A: Round up. The cost difference between adjacent models is small compared to the risk of stalling mid-move or overloading the frame.
Q: How do I handle loads over 50 tons?
A: Use a synchronized multi-skate train. Two MH50L units running synchronously can move up to 100 tons. This is the standard method for heavy presses, large transformers, and ship engine blocks.
Q: Do I need the Lift series or can I use a separate jack?
A: Both work. The Lift series saves time and eliminates the separate claw jack, but a standard low-profile toe jack (10-30 ton) works fine with any MHBY skate if your machine has accessible jacking points.
Next Step: Match the Skate to Your Heaviest Move
Start with your single heaviest machine. Weigh it, apply the floor-condition margin, and pick the skate with at least 2× that weight in traction capacity. If you’re between sizes, go up. If you’re over 25 tons, plan for a synchronized train from the start.
Need help with a specific machine? Send us the weight, dimensions and a photo of the underside — our engineers will confirm the right model and configuration for your path and floor conditions.