Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S 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 75mm for a usable window of 175–250mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke250 mm
- Adjustable175–250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S
The AirTAC MBLCJ40X250-75S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The 75 mm rear adjuster creates a usable end-position window of 175 to 250 mm, allowing you to dial in the exact travel distance without moving the physical mounts.
Unlike the fixed rubber bumper found on the MBLJ series, the screw-tunable air cushion on this unit lets you regulate end-of-stroke deceleration for heavier 250 mm moves, protecting the end covers from impact. The 20 µm hard-chrome plated carbon-steel rod resists corrosion, while the heterogeneous two-way grease-retaining piston seal maintains lubrication over high-speed cycles. The built-in magnet (-S) supports CMSG, DMSG, and EMSG sensor switches for precise position detection.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 175–250 mm (trim 75 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 MBLCJ40X250-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ40X250-75S Is Used
Textile Loom Beam Lifting
Raises and lowers heavy warp beams on a weaving loom, using the 628 N push force and the 175-250 mm window to fine-tune the lifting height for different fabric run lengths.
CNC Pallet Stopper Gate
Acts as an adjustable hard stop for inbound machining pallets, where the tunable air cushion softly decelerates the 250 mm travel to prevent pallet payload shock at the end of the stroke.
Printed Circuit Board Conveyor Divert
Extends a routing flap on a PCB assembly conveyor, relying on the DMSG electronic sensor to confirm full extension before a 40 mm bore retraction diverts the board.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75S the Right Cylinder?
If you need less force, step down to the 32 mm bore (402 N push @0.5 MPa); if your load requires more thrust, step up to the 50 mm bore (981 N push @0.5 MPa). Choose this MBLCJ over the MBLJ when your 250 mm travel speed demands tunable cushioning rather than a fixed bumper, or over the MBLC if you need the 175-250 mm rear travel adjustment. Remember the rear stopper sets the travel end and the cushion only decelerates; neither holds the load, so use an external lock for position holding. Mounting is limited to Basic, FA, or LB; no SDB or back-cover options exist. To match this exact replacement: 40 mm bore, 250 mm stroke, 75 mm adjust, G1/4 port, PT thread, and an S magnet.
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 MBLCJ40X250-75S FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The 75 mm rear adjuster is a mechanical travel stop that sets your usable stroke window between 175 and 250 mm. The adjustable air cushion is a separate screw-tunable valve that regulates end-of-stroke deceleration speed. The adjuster stops travel; the cushion softens the stop. Neither acts as a lock to hold a load.
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