Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 200–250mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke250 mm
- Adjustable200–250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50
The AirTAC MBLCJ40X250-50 is a compact double-acting mini cylinder featuring a rear stroke adjuster and tunable air cushioning at both ends. The rear stopper trims up to 50mm of travel, creating a usable 200-250mm stroke window for precise end-positioning. Driven by a Ø16 carbon-steel rod through a G1/4 port, it delivers 628N push and 528N pull force at 0.5 MPa, making it well-suited for mid-weight positioning tasks over a 250mm span.
Unlike the standard MBLJ bumper, the screw-tunable cushion on this unit allows you to dial in end-of-stroke deceleration, absorbing kinetic energy from heavy fast-moving loads to protect the aluminum end covers. The riveted rolling-packed barrel and two-way grease-retaining piston seal ensure consistent lubrication over the 30-800mm/s speed range. This specific SKU lacks the -S magnet option, meaning it cannot accept CMSG, DMSG, or EMSG position sensors without a physical code change.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 200–250 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLCJ40X250-50
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ40X250-50 Is Used
Carton Erector Pusher
Drives the 250mm carton folding stroke on packaging lines, using the 200-250mm adjustable window to time the exact paperboard handoff and the air cushion to prevent hard end-impacts on the 628N push cycle.
Pallet Diverter Arm
Actuates a diverting gate on a 600mm wide logistics conveyor, relying on the tunable cushion to smoothly brake the 528N pull stroke without jarring the lightweight aluminum frame.
Textile Take-Up Mechanism
Adjusts fabric tensioning rollers over a 200-250mm range, allowing operators to dial in the rear stopper to match varying fabric widths without re-mounting the cylinder.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50 the Right Cylinder?
When sizing this 40mm bore, stepping down to the 32mm bore drops the output to 402N push at 0.5 MPa, while stepping up to the 50mm bore increases it to 981N. Choose this MBLCJ over the MBLJ when your payload requires controlled deceleration rather than a hard rubber bumper impact, or over the MBLC when you need to fine-tune the travel limit. Remember that the rear adjuster is strictly a travel stop, and the cushion only decelerates; neither feature will lock or hold a suspended load, so external guidance is required for gravity-overcoming tasks.
For replacements, match the 40mm bore, 250mm stroke, 50mm adjust code, G1/4 port, PT thread form, and Basic mounting. Because the overall length equals A + 2 x stroke + adjust, this 250mm travel yields a physically long body; combined with the 16mm rod, long strokes demand an external guide rail to prevent rod bending and premature seal wear under side-loading.
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 MBLCJ40X250-50 FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N push force and 528N pull force. At 0.7 MPa, the push force increases to 880N. The maximum theoretical force is 128 kgf at 1.0 MPa. The operating pressure range is 0.15-1.0 MPa.
No. This specific SKU does not have the -S code, meaning it lacks a built-in magnet and cannot accept AirTAC CMSG (reed) or DMSG/EMSG (electronic) position switches. You would need to specify an MBLCJ40X250-50S model to utilize sensor tracking.
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