Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X25-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X25-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 25mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 5–25mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke25 mm
- Adjustable5–25 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 MBLCJ20X25-20S
The AirTAC MBLCJ20X25-20S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 157 N of push force at 0.5 MPa. The rear stopper allows you to trim up to 20 mm of travel, creating a highly precise usable stroke window of 5 to 25 mm for short-stroke clamping and positioning tasks.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this SKU uses screw-tunable pneumatic cushioning to decelerate loads smoothly at the end caps, making it ideal for faster cyclic operations. The integrated -S magnet enables position detection via AirTAC CMSG (reed) or DMSG/EMSG (electronic) switches. The Ø8 mm hard-chrome plated carbon-steel rod and riveted rolling-packed barrel provide durable, leak-free performance in tight machinery spaces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X25-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X25-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 25 mm |
| Adjustable window | 5–25 mm (trim 20 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 MBLCJ20X25-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×25 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ20X25-20S Is Used
PCB Edge Guiding
Provides 157 N of push force to align delicate printed circuit boards on an SMT conveyor, using the 5-25 mm stroke window to dial in exact edge contact without crushing components.
Micro-Clamp Actuation
Ideal for small pneumatic vises holding lightweight aluminum brackets, where the adjustable air cushion ensures the jaw closes smoothly without bouncing the workpiece.
Label Applicator Tamp
Drives a compact tamp head in packaging lines, using the integrated magnet to confirm label placement position via an electronic DMSG sensor at high cycle rates.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X25-20S the Right Cylinder?
Choose this 20 mm bore when you need 157 N push force at 0.5 MPa within a confined footprint. If your application requires less force, there is no smaller bore in this series, so you would look outside the MBLCJ family; if you need more power, stepping up to the 25 mm bore yields 245 N push at 0.5 MPa. Compared to the MBLJ (fixed bumper) or MBLC (fixed stroke), this model gives you both tunable end-deceleration and a variable 5-25 mm stroke window.
Remember that the rear adjuster acts only as a mechanical travel stop, while the air cushion solely regulates end-of-stroke speed; neither component can hold a load in place without continuous air pressure. Mounting is restricted to Basic, FA (flange), or LB (foot) styles, as this series omits SDB pivot and back-cover options. For an exact replacement, match the 20 mm bore, 25 mm stroke, 20 mm adjust code, G1/8 port, PT thread, and the -S magnet specification.
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 MBLCJ20X25-20S FAQ
At 0.5 MPa, this double-acting cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa, with an operating pressure range of 0.15 to 1.0 MPa and a speed range of 30-800 mm/s.
The rear stroke adjuster is a mechanical travel stop that physically limits the rod extension, giving you a usable stroke window of 5 to 25 mm for this specific SKU. The adjustable air cushion, present at both ends, uses needle screws to regulate trapped air to decelerate the piston near the end of its travel. Neither feature locks or holds the load without live 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.
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