Specifications: MBL25X30U — AirTAC MBL aluminum alloy mini cylinder, double acting, single rod, 25 mm bore and 30 mm stroke. PT1/8 port; nonmagnetic piston.
MAL to MBL Replacement
This listing is for MBL25X30U. The MAL series is discontinued. All orders placed under the corresponding legacy MAL listing MAL25X30U are fulfilled with MBL25X30U. The cylinder supplied will be MBL, not MAL. The bore, stroke, magnetic option, rear-cover code, mounting code and port-thread selection are retained in this ordering correspondence.
The compared MAL and MBL drawings give the same A + stroke length for this 25 mm bore and U rear cover: 114 + 30 = 144 mm. Other body and rod-projection dimensions differ; check the mounting interface and clearances before installation. This store replacement policy is not a declaration that every dimension is identical.
Product Catalog
Download AirTAC MBL / MBLC Catalog (English PDF)
Download AirTAC MAL Legacy Catalog (Chinese PDF)
Read the MAL vs MBL Dimensions and Replacement Guide
Download AirTAC 2022 Sensor and Mounting Compatibility Guide (PDF)
Download 2022 mounting brackets (PDF)
Download 2022 rod-end joints and sensor mounts (PDF)
Download 2022 cylinder installation and weight tables (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Model Code Explained
| Code |
Meaning |
| MBL |
aluminum alloy mini cylinder; double acting, single rod |
| 25 |
Cylinder bore: 25 mm |
| X30 |
Stroke: 30 mm |
| No S code |
Nonmagnetic piston |
| U |
flat rear cover with radial air port |
| No thread suffix |
PT pipe thread (catalog default) |
Technical Specifications
| Parameter |
Details |
| Model |
MBL25X30U |
| Product type |
aluminum alloy mini cylinder |
| Operation |
double acting, single rod |
| Bore |
25 mm |
| Stroke |
30 mm |
| Piston-rod diameter |
10 mm |
| Rod-end thread |
M10 × 1.25 |
| Working medium |
Air filtered to 40 µm or finer |
| Operating pressure |
0.15–1.0 MPa |
| Proof pressure |
1.5 MPa |
| Operating temperature |
−20 to +70 °C |
| Piston speed |
30–800 mm/s |
| Port |
PT1/8 |
| Cushioning |
Bumper |
| Magnetic piston |
Not included; no S code |
| Stroke tolerance |
+1.0 / 0 mm up to 150 mm; +1.5 / 0 mm above 150 mm |
| Rear cover |
flat rear cover with radial air port |
Features and Operation
- Alternating the supply and exhaust at the two cylinder ports drives extension and retraction.
- The tube and end-cover construction is not intended for dismantling. Protect the rod and sliding surfaces, and keep the load aligned with the cylinder axis.
The catalog describes a compact piston with a two-way sealing arrangement and a grease-retaining function. The aluminum-alloy tube and end covers use a rolled connection. The English overview contains a stainless-steel wording inconsistency; the material table and Chinese MBL chapter identify an aluminum-alloy tube.
External and Mounting Dimensions
The following symbols refer to the MBL drawing for 25 mm bore, 30 mm stroke and U rear cover in the 2022 cylinder catalog, printed page 114. Values are in mm unless a thread or formula is stated. The symbols retain the drawing references and must not be rearranged into an unsupported length × width × height.
| Parameter |
Details |
| A — base length before the stroke term |
114 mm |
| AB |
44 mm |
| AC |
70 mm |
| B — body dimension in the drawing |
30 mm |
| M — body mounting thread |
M22 × 1.5 |
| G |
29 mm |
| EA |
21 mm |
| Overall length from the printed formula |
144 mm |
| Drawing length relation |
A + stroke |
| AD |
15.5 mm |
| C |
16 mm; drawing tolerance ±0.07 mm |
| D |
10 mm |
| DA |
30 mm |
| MA |
14 mm |
| E |
M10 × 1.25 |
| EB |
19.5 mm |
| F |
17 mm |
| FA |
6 mm |
| GA |
8 mm |
| H |
8 mm |
| P |
PT1/8 |
| PA |
7.5 mm |
| AC + stroke |
70 + 30 = 100 mm |
| Magnetic versus nonmagnetic dimensions |
The catalog states that the external dimensions are the same. |
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Compatible Accessories and Sensors
| Accessory code |
Purpose and compatibility |
| F-MA20LB |
F-MA20LB: foot bracket for MBL series, 25 mm bore. Optional; not implied by this model code. |
| F-MA20FA |
F-MA20FA: front flange for MBL series, 25 mm bore. Optional; not implied by this model code. |
| F-MA20SDB |
F-MA20SDB: rear pivot bracket listed for the MBL 25 mm bore family, supplied with its matching pin. The installation drawing uses a CA pivot-eye rear connection. This model has a flat U cover; direct pin mounting to that U cover is not shown. |
| F-MA25I |
F-MA25I: rod-end eye joint for MBL series, 25 mm bore. Optional; not implied by this model code. |
| F-MA25Y |
F-MA25Y: rod-end fork joint for MBL series, 25 mm bore. Optional; not implied by this model code. |
| F-M10X125F |
F-M10X125F: floating joint for MBL series, 25 mm bore. Optional; not implied by this model code. |
| F-M10X125U |
F-M10X125U: spherical rod-end joint for MBL series, 25 mm bore. Optional; not implied by this model code. |
This MBL25X30U has no S magnetic-piston code. CMSG/DMSG magnetic detection is listed for the corresponding magnetic version, not for this nonmagnetic cylinder. Adding a sensor band does not add a piston magnet.
The 2022 Chinese MBL selection specifies CMSG/DMSG profiles and the bore-matched round-body band. The supplied English edition also lists EMSG; that additional edition entry does not change the Chinese CMSG/DMSG selection stated here. Select the complete electrical sensor code separately.
Weight Reference
224 g — catalog reference weight. The cylinder reference is 224 g from the separately labelled MBL table for 25 mm bore, 30 mm stroke and U rear cover (2022 Chinese catalog, printed page 426). PT, G and NPT options have no separate weight allowance on that page. All catalog weights and estimates are for reference only; actual product weight prevails.
Force Reference
Calculated theoretical force at 0.5 MPa: extension 245.3 N; retraction 206.1 N, using bore 25 mm and rod diameter 10 mm. This pressure × effective-area calculation excludes friction, acceleration and safety/load factors; it is not a guaranteed usable load. Check the actual operating pressure and mechanism load.
Internal Components and Materials
| Component |
Catalog material |
| Piston rod |
S45C, hard-chromed and ground |
| Tube, covers and piston |
Aluminum alloy |
| Hexagon nut |
Carbon steel |
| Fasteners |
Alloy steel |
| O-rings |
NBR |
| Bumper / cushion ring |
TPU |
| Wear ring |
Wear-resistant material |
Numbered material reference from the MBLC-CA cutaway in the 2022 Chinese catalog, printed page 114. The shared body parts are identified below; this ordinary MBL model uses bumper cushioning, not the adjustable pneumatic cushion of MBLC. The piston magnet is present only in S models.
| Parameter |
Details |
| 1 — Rod hexagon nut |
Carbon steel |
| 2 — Piston rod |
S45C, hard-chromed and ground |
| 3 — Front-cover seal |
NBR |
| 4 — Front-cover nut |
Carbon steel |
| 5 — Front cover |
Aluminum alloy |
| 7 — Cylinder tube |
Aluminum alloy |
| 8 — O-ring |
NBR |
| 9 — Piston |
Aluminum alloy |
| 10 — Piston seal |
NBR |
| 12 — Wear ring |
Wear-resistant material |
| 13 — Screw |
Alloy steel |
| 14 — Rear cover |
Aluminum alloy |
Series Ordering Reference
Standard strokes listed for this bore and operating variant: 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 100, 125, 150, 160, 175, 200, 250, 300, 350, 400, 450, 500 mm. These are alternative order selections; they are not additional travel available from the current cylinder.
Select the operating variant, bore, stroke, magnetic option, rear-cover form, mounting accessory and pipe-thread option from the corresponding ordering chart. Do not transfer rear-cover or mount choices between single-rod, double-rod and adjustable-stroke versions without checking their dedicated row.
For the ordinary MBL series, the catalog lists a maximum standard stroke of 500 mm and an allowable special stroke of 800 mm. A special stroke requires its approved order and drawing; it is not extra travel available from the current cylinder. CA and U are the listed rear covers. CM is an old MAL rear-cover option and is not an MBL ordering code.
Selection, Installation and Use
- Select the bore and operating pressure from the required force, then check the stroke, moving load, speed, cushioning and mounting method for the mechanism.
- Flush the air lines before connection. Keep sealing tape or sealant clear of the first 1–2 thread turns and prevent water, particles or corrosive gases entering the cylinder.
- Keep the rod axis aligned with the load. Provide guides or supports where needed; avoid direct side loading and twisting of an unguided piston rod.
- Start speed adjustment with the flow-control valve closed and open it gradually. Meter-out control is the usual reference circuit; verify the actual single-acting or double-acting circuit.
- Factory-prelubricated cylinders can be used without additional lubrication. If a lubricator is used, the general instructions specify additive-free ISO VG32 turbine oil and continued lubrication.
- Isolate the air supply and exhaust residual pressure before servicing. Secure retained loads and prevent unexpected movement on restart. Protect against freezing, corrosion and strong external magnetic fields where magnetic sensing is used.
Circuit-selection reference at a theoretical 500 mm/s: for 25 mm bore the general catalog lists effective area 1.3 mm², valve examples 5V110M5 / 5V120M5, pneumatic-pilot alternatives 4A110M5 / 4A120M5, flow control PTLM5, silencer BSLM5, and tubing 6 mm OD × 4 mm ID. These are selection examples, not included components or a guaranteed installed speed; check actual port/thread adapters, pressure loss, tube length and load.