Aluminium Guided Air Cylinder

MGPM guided rod cylinders use a sliding bearing guide for reliable anti-rotation and side-load resistance at a lower cost than ball bearing variants. Bore Ø12–Ø100mm, compact dual guide rod body.

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Product Introduction

The Standard Choice When You Don't Need to Pay for Extra Precision

Most guided cylinder applications don't need the tightest possible rotation accuracy - they need reliable resistance to side load and rotation, in a compact body, at a reasonable cost. That's what MGPM is built for. It's the sliding bearing configuration of the MGP thin-profile guided rod cylinder: the same compact dual guide rod body as the rest of the series, with the guide rods supported on a sliding bushing rather than ball bearings.

Sliding bearing guiding is a mature, well-proven approach - lower cost to manufacture, fewer components, and accuracy that's more than sufficient for general assembly, positioning, and clamping work where the load isn't especially heavy, off-center, or running at extremely high cycle rates. For the majority of automation tasks that call for a guided cylinder at all, MGPM is the sensible default rather than a compromise.

What MGPM Is Built For

General-purpose guiding without the premium. If the application just needs to resist rotation and hold reasonable positioning accuracy - rather than chase the tightest tolerance available - MGPM delivers that at a lower cost than the ball bearing (MGPL) or high-precision ball bearing (MGPA) variants in the same series.

Compact, integrated construction. Like the rest of the MGP family, MGPM combines the cylinder and guide mechanism into a single thin-profile body, removing the need for a separate external guide rail and the extra parts, alignment work, and maintenance points that come with one.

Reliable side-load and anti-rotation performance for everyday duty cycles. Two guide rods resist torque and lateral force effectively for moderate cycle rates and loads - the point where sliding bearing wear becomes a practical concern is typically continuous, high-frequency operation over an extended service life, not general assembly or positioning work.

A straightforward upgrade path if requirements change later. Because MGPM, MGPL, and MGPA share the same body dimensions, an application that starts on MGPM and later needs tighter accuracy or longer service life under heavy cycling can move to the ball bearing variant without a mounting redesign.

When MGPM Is the Right Call - and When It Isn't

MGPM is a good fit when:

The load stays roughly centered, without heavy off-axis force

Cycle rate is moderate rather than continuous, high-frequency operation

The application needs reliable anti-rotation and positioning, not the tightest achievable tolerance

Cost efficiency matters and the extra precision of a ball bearing guide wouldn't be put to use

It's worth stepping up to MGPL (ball bearing) or MGPA (high-precision ball bearing) instead when:

The equipment runs continuous high-cycle operation and positioning has drifted on a sliding-bearing cylinder before

The application's tolerance requirement is tight enough that bearing wear over time is a real concern, not a theoretical one

Accuracy needs to hold consistently over a long service interval without frequent re-calibration

Reading the Model Code

MGPM25-300 breaks down as:

MGP - thin-profile guided rod cylinder series

M - sliding bearing guide (as opposed to L for ball bearing, or A for high-precision ball bearing)

25 - 25 mm bore

300 - 300 mm stroke

A typical order pairs the cylinder with a magnetic switch for position feedback - specify bore, stroke, and switch model/quantity, and the correct configuration will be confirmed.

Where MGPM Is Typically Used

General assembly automation - fixture positioning and clamping tasks where reliable anti-rotation matters more than maximum achievable precision.

Material handling - transfer and positioning stages running moderate cycle rates, where the load stays reasonably centered.

Packaging equipment - pushing, feeding, and sorting mechanisms where a compact guided cylinder is needed but ultra-tight tolerance isn't the deciding factor.

Cost-sensitive automation builds - projects where guided cylinders are needed throughout the machine and per-unit cost across many actuators adds up quickly.

Frequently Asked Questions

What does the "M" in MGPM stand for? Sliding bearing. The MGP series shares one body across three guide bearing types - M for sliding bearing, L for ball bearing, A for high-precision ball bearing - and MGPM is the sliding bearing configuration.

Is MGPM less accurate than MGPL or MGPA? Yes, in relative terms - sliding bearing guiding typically holds a wider rotation accuracy tolerance than ball bearing guiding, and wears at a faster rate under sustained cycling. Whether that difference matters depends on the application's actual tolerance requirement and duty cycle.

Why would I choose MGPM over the more precise variants if it's available? Cost and simplicity, mainly. If the application doesn't need tighter accuracy than MGPM already provides, paying for ball bearing or high-precision ball bearing guiding doesn't add practical value - it just adds cost.

Can I upgrade from MGPM to MGPL later if my accuracy needs change? Generally yes - MGPM, MGPL, and MGPA share the same body dimensions within the MGP series, so switching guide bearing type for a future application doesn't typically require a mounting redesign. Confirm compatibility for your specific bore and stroke when the need arises.

Does MGPM require lubrication? No, not under normal operating conditions. If lubrication is preferred for a specific application, ISO VG32 turbine oil (Class 1 or equivalent) is the specified type.

How do I know if MGPM is sufficient for my application, or if I should size up to a ball bearing variant? If the load is roughly centered, cycle rate is moderate, and there's no history of positioning drift on similar equipment, MGPM is usually sufficient. If you're unsure, share your load, cycle rate, and tolerance requirement for a direct recommendation.