Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 400mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 325–400mm. Adjustable air cushion (both ends).
- BoreØ50 mm
- Stroke400 mm
- Adjustable325–400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable air cushion (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S
The AirTAC MBLCJ50X400-75S is a compact double-acting mini cylinder featuring a riveted aluminum barrel and a single Ø16 mm hard-chrome plated rod. It delivers 981 N of push thrust at 0.5 MPa (881 N pull) and uses a built-in magnet (-S) for CMSG reed or DMSG/EMSG solid-state position sensing. A 75 mm rear stroke adjuster creates a usable 325-400 mm travel window, letting you fine-tune the end position without mechanical shims.
Unlike the base MBLJ with its fixed rubber bumper, this MBLCJ variant features an adjustable air cushion at both ends. The screw-tunable cushioning decelerates heavy 200 kgf loads near the stroke extremes, protecting the end covers from impact damage. Keep in mind the rear stopper sets the travel endpoint but does not hold the load; because it is a single-acting air cylinder, the rod drifts without live air pressure. With a 400 mm stroke, the 16 mm rod is highly susceptible to side-load bending, so an external guide rail is mandatory to prevent premature seal wear.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 400 mm |
| Adjustable window | 325–400 mm (trim 75 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 MBLCJ50X400-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 MBLCJ50X400-75S Is Used
Injection Mold Ejection
Provides 981 N of push force at 0.5 MPa to eject heavy plastic parts from a mold, using the 325-400 mm adjustable window to time the ejection stroke perfectly.
CNC Lathe Bar Feeder
The dual adjustable air cushions decelerate the 400 mm stroke at high speed when feeding heavy steel bar stock, preventing impact damage to the lathe chuck.
Pallet Diverting Arm
Uses the built-in -S magnet with a DMSG electronic sensor to confirm the extended position of a heavy pallet diverting arm on a packaging conveyor line.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X400-75S the Right Cylinder?
Stepping down from this 50 mm bore (981 N push @0.5 MPa), the 40 mm bore offers 628 N and is a lighter alternative if your payload permits. Stepping up, the 63 mm bore provides 1558 N for heavier masses. Choose the MBLCJ over the MBLJ when your cycle speed requires tunable deceleration rather than a fixed bumper, or the MBLC if you need a fixed 400 mm stroke without the rear adjuster. The rear stroke adjuster and air cushions regulate travel and speed, but neither acts as a mechanical lock to hold position under load.
For replacements, match the 50 mm bore, 400 mm stroke, and 75 mm adjust code. This specific SKU uses a G1/4 port, an M14x1.5 rod-end thread, and default PT (tapered) piping. It includes the -S magnet for sensor tracks and is limited to Basic, FA (flange), or LB (foot) mounts; there is no SDB pivot or back-cover option. Overall length equals A + 2 x stroke + adjust, making it significantly longer than a fixed-stroke cylinder.
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 MBLCJ50X400-75S FAQ
At 0.5 MPa it delivers 981 N push and 881 N pull force. At 0.7 MPa push increases to 1374 N, with a theoretical maximum of 200 kgf at 1.0 MPa. The 75 mm rear adjuster allows you to trim the usable stroke window down to 325 mm.
The rear stroke adjuster is a mechanical travel stop that sets the end position (325-400 mm window), while the adjustable air cushion uses screw-tuning to decelerate the piston near the end caps. Neither holds the load in place; the rod drifts without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
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