Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 220–250mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke250 mm
- Adjustable220–250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30
The AirTAC MBLCJ25X250-30 is a double-acting, single-rod mini cylinder featuring a rear travel stopper that trims up to 30mm, yielding a usable extension window of 220-250mm. It generates 245N push and 206N pull force at 0.5MPa, making it well-suited for long-reach positioning tasks. Unlike the base MBLJ, this variant integrates screw-tunable adjustable air cushions at both ends to decelerate the rod rapidly without slamming the end covers.
This 25mm bore unit uses a G1/8 port and a Ø10mm carbon-steel rod with 20µm hard-chrome plating. The riveted aluminum barrel and grease-retaining two-way piston seal keep contaminants out in tight spaces. Note that this specific SKU lacks the -S magnet code, meaning it cannot host a CMSG or DMSG position sensor. The rear adjuster sets the end position, while the cushion controls deceleration—neither function mechanically locks or holds the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 220–250 mm (trim 30 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 300 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -30 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 Is Used
Textile Loom Let-Off
Drives the tensioning beam in a weaving loom, using the 220-250mm window to dial in exact yarn feed limits while the air cushions absorb the rapid 245N tugs.
PCB Router Z-Axis Stop
Sets a precise lower travel limit for a spindle router, tuning the cushion to prevent bounce when the 0.7MPa force hits the rigid depth stop.
Carton Flap Folder
Extends to fold heavy corrugated flaps on a packaging line, relying on the 250mm reach and deceleration to avoid tearing the cardboard.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 the Right Cylinder?
If you need less reach or force, stepping down to the 20mm bore yields 157N push at 0.5MPa, whereas stepping up to the 32mm bore provides 402N for heavier loads. Choose this MBLCJ over the MBLJ when your application speed requires tunable pneumatic deceleration rather than a fixed rubber bumper, or over the MBLC if you need that rear travel adjustment window. Remember the rear stopper is a travel end, not a lock; use an external guide for side loads. Mounting is limited to Basic, FA, or LB (no SDB or back-cover options). For an exact replacement, match the 25mm bore, 250mm stroke, 30mm adjust, G1/8 PT thread, and confirm no magnet is fitted. Because the stroke is 250mm on a 10mm rod, add an external guide to prevent rod bending and seal wear.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X250-30 FAQ
This 25mm bore cylinder delivers 245N push and 206N pull at 0.5MPa, 343N push at 0.7MPa, and a maximum theoretical 50kgf at 1.0MPa. The maximum standard stroke for a 25mm bore is 300mm, so this 250mm unit is within standard limits.
The rear adjuster mechanically trims the stroke window to 220-250mm, acting as a hard travel stop. The adjustable air cushion uses a needle screw to tune pneumatic deceleration near the covers. Neither holds the load. Because this SKU lacks the -S suffix, it has no built-in magnet and cannot accept CMSG or DMSG sensors.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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