Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 100mm for a usable window of 200–300mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke300 mm
- Adjustable200–300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S
The AirTAC MBLCJ40X300-100S 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 100 mm rear adjuster creates a usable stroke window of 200 to 300 mm, letting you dial in the exact travel end for your specific tooling. A built-in magnet (-S) enables position detection.
Unlike the fixed rubber bumper found on the base MBLJ, this model uses screw-tunable air cushions at each end to decelerate heavier loads smoothly, protecting the end covers from impact. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod withstand demanding cycles. Remember that the rear adjuster acts purely as a travel stop and does not lock the load in place; external guide rails are strongly recommended for this 300 mm stroke to prevent rod bending from side loads.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 200–300 mm (trim 100 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 MBLCJ40X300-100S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -100 | 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 MBLCJ40X300-100S Is Used
Injection Mold Ejection
Dialing the 200-300 mm stroke window to precisely strip parts from injection molds, using the 628 N push force and tuned air cushion to prevent cracking upon ejection.
Pallet Transfer Stoppers
Halting heavy pallets on a packaging line, where the adjustable cushion absorbs the kinetic energy of the load at the 300 mm travel end without slamming the cover.
CNC Tool Changer Arms
Driving an ATC arm in a machining center, relying on the -S magnet and DMSG electronic sensor to confirm the retracted position before the spindle ramps up.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100S the Right Cylinder?
If you need less force, the 32 mm bore provides 402 N push at 0.5 MPa, while stepping up to the 50 mm bore yields 981 N for heavier mechanisms. Choose this MBLCJ over the MBLJ when your moving mass requires tunable end-of-stroke deceleration rather than a fixed bumper. To match this exact SKU for a replacement, verify the 40 mm bore, 300 mm stroke, 100 mm adjust code, G1/4 port, PT thread, and the -S magnet. Note that the adjustable cushion only softens the stop; it will not hold a load statically without live air pressure. Mounting is limited to Basic, FA, or LB styles, as no back-cover or SDB pivot options exist for this series.
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 MBLCJ40X300-100S FAQ
At 0.5 MPa, this 40 mm bore cylinder outputs 628 N push and 528 N pull. At 0.7 MPa, the push increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The 100 mm rear adjuster physically sets the travel end, giving you a 200 to 300 mm usable window. The adjustable air cushion only tunes the deceleration rate near that end. Neither mechanism locks the rod; the cylinder drifts without live air.
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