Specifications: MBL25X40SU — AirTAC MBL aluminum alloy mini cylinder, double acting, single rod, 25 mm bore and 40 mm stroke. PT1/8 port; magnetic piston.
MAL to MBL Replacement
This listing is for MBL25X40SU. The MAL series is discontinued. All orders placed under the corresponding legacy MAL listing MAL25X40SU are fulfilled with MBL25X40SU. 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 + 40 = 154 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
X40
Stroke: 40 mm
S
Magnetic piston
U
flat rear cover with radial air port
No thread suffix
PT pipe thread (catalog default)
Technical Specifications
Parameter
Details
Model
MBL25X40SU
Product type
aluminum alloy mini cylinder
Operation
double acting, single rod
Bore
25 mm
Stroke
40 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
Included (S)
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, 40 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
154 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 + 40 = 110 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.
For this magnetic MBL cylinder with 25 mm bore, the 2022 sensor selection table lists CMSG and DMSG with the round-cylinder mounting band F-MQA25. The band matches the aluminum cylinder body; do not substitute a tie-rod bracket or a different bore size. Sensors and bands are selected separately and are not implied by the S piston-magnet code.
Fit the sensor into the band holder, wrap and fasten the band around the cylinder, move it to the required detection position, then tighten the sensor and band fasteners. Select the complete sensor order code to match the required supply voltage, output circuit, wiring and cable length; CMSG/DMSG here identify compatible sensor profiles.
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
240 g — catalog reference weight. The cylinder reference is 235 g from the separately labelled MBL table for 25 mm bore, 40 mm stroke and U rear cover plus the printed 5 g magnetic-piston allowance (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
Magnet
Plastic magnet
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
11 — Magnet (magnetic version only)
Plastic magnet
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.
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