Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 275–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable275–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75
The AirTAC MBLCJ40X350-75 is a compact double-acting aluminum mini cylinder featuring a rear travel stopper and screw-tunable air cushions at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The rear adjuster allows you to trim up to 75 mm of travel, creating a usable stroke window of 275 to 350 mm. This 350 mm travel length is well-suited for long-reach indexing or part ejection tasks that need precise end-position tuning.
Unlike the base MBLJ which relies on a fixed rubber bumper, this MBLCJ variant features an adjustable air cushion at both ends to smoothly decelerate heavier loads at high speeds, protecting the end covers from impact. The cylinder uses a G1/4 port, a Ø16 mm hard-chrome plated carbon steel rod, and a riveted rolling-packed barrel for structural integrity. Because this SKU lacks the -S suffix, it is built without a magnet and cannot support CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 275–350 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 MBLCJ40X350-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MBLCJ40X350-75 Is Used
Long-Reach Ejection
Ejects molded plastic parts from a 350 mm deep press bed, using the 275-350 mm adjustable stroke window to dial in the exact ejection point without moving the cylinder mount.
Packaging Conveyor Divert
Diverts heavy corrugated cardboard cartons on a packaging line, leveraging the 628 N push force and the dual adjustable air cushions to prevent harsh end-of-stroke slamming during rapid cycling.
Pallet Stack Indexing
Indexes empty pallets into a stacking fixture, using the 75 mm rear stroke adjustment to accommodate varying pallet thicknesses while relying on external guides to support the long rod.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-75 the Right Cylinder?
Choose this 40 mm bore when an application requires roughly 628 N of push force at 0.5 MPa. If your load is lighter, stepping down to the 32 mm bore yields 402 N of push force, while stepping up to the 50 mm bore provides 981 N for heavier payloads. Compared to the MBLJ (fixed bumper) and MBLC (fixed stroke) variants, this MBLCJ gives you both a tunable end position and screw-adjustable end-of-stroke deceleration.
Remember that the rear adjuster is a travel stop, not a lock, and the air cushions only decelerate; neither feature will hold a load in place without continuous air pressure, so an external locking mechanism is required for true position holding. Mounting is limited to Basic, FA flange, or LB foot styles, as no back-cover or SDB pivot options exist for this series. At 350 mm of stroke, the Ø16 mm rod is susceptible to side-loading and bending under offset loads, so an external guide rail should be used to prevent premature seal wear. For replacements, match the 40 mm bore, 350 mm stroke, 75 mm adjust code, G1/4 port, PT thread, and confirm no magnet is required.
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 MBLCJ40X350-75 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
No. The 75 mm rear adjustment screw is a travel stop that sets the end position within a 275-350 mm window, and the adjustable air cushions only regulate deceleration speed. Neither component mechanically locks the rod, and the cylinder will drift without live air pressure. Additionally, because this specific SKU lacks the -S magnet option, it cannot be used with CMSG, DMSG, or EMSG electronic position sensors.
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