Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 220–250mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke250 mm
- Adjustable220–250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- 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 MBLCJ20X250-30
The AirTAC MBLCJ20X250-30 is a compact, double-acting mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa, making it suited for lighter-duty cycling. The 30 mm rear trimmer creates a usable travel window of 220 to 250 mm, allowing you to dial in the exact end position without moving physical mounts.
This model uses an Ø8 hard-chrome plated carbon steel rod and a G1/8 port. The riveted aluminum barrel and grease-retaining two-way piston seal keep friction low across the 30 to 800 mm/s speed range. Because this specific SKU lacks the -S magnet code, it cannot accept an AirTAC CMSG, DMSG, or EMSG position sensor. The adjustable air cushion screws let you tune end-of-stroke deceleration to protect the end covers, which is critical for preventing impact damage on longer 250 mm strokes.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 220–250 mm (trim 30 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X250-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ20X250-30 Is Used
PCB Shuttle Conveyors
Provides 157 N of push at 0.5 MPa to shuttle light printed circuit board trays along a 250 mm stroke, using the 30 mm rear stopper to perfectly time the transfer position.
Pick-and-Place Grippers
Tunes the end-of-stroke air cushion to gently decelerate a vertical gripper assembly over a 220 to 250 mm travel window, protecting delicate surface-mount components from sudden jolts.
Label Applicator Arms
Cycles at high speeds up to 800 mm/s to apply adhesive labels, relying on the adjustable cushion needles to prevent end-cover impact when the 8 mm rod fully extends.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-30 the Right Cylinder?
If you need less force, stepping down to the Ø16 bore provides 80 N of push at 0.5 MPa, but stepping up to the Ø25 bore gives you 245 N of thrust, offering a safer margin for heavier sliding friction. Choose this MBLCJ over the MBLJ when your moving mass requires screw-tunable pneumatic deceleration instead of a fixed rubber bumper, or over the MBLC when you need to trim the end position by up to 30 mm.
Remember that the rear adjuster is a travel stop, not a lock, and the air cushion only decelerates; neither will hold a load statically without live air pressure. Mounting is limited to Basic, FA flange, or LB foot brackets, as there is no back-cover or SDB pivot option for this series. For a direct replacement, match the 20 mm bore, 250 mm stroke, 30 mm adjust code, G1/8 PT thread, and confirm no magnet is fitted. With a 250 mm stroke on an Ø8 rod, adding an external guide rail is highly recommended to prevent rod bending under side loads.
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 MBLCJ20X250-30 FAQ
This 20 mm bore cylinder generates 157 N push and 132 N pull at 0.5 MPa, 220 N push at 0.7 MPa, and a maximum theoretical output of 32 kgf at 1.0 MPa.
No, this specific SKU lacks the -S code, meaning no built-in magnet is fitted, so AirTAC CMSG, DMSG, or EMSG electronic switches cannot detect the rod position.
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.
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