Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-75S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 175mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 100–175mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke175 mm
- Adjustable100–175 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 MBLCJ20X175-75S
The AirTAC MBLCJ20X175-75S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. The rear stopper trims up to 75 mm of travel, yielding a usable stroke window of 100-175 mm for precise positioning. Driven by an 8 mm carbon-steel rod with 20 µm hard-chrome plating, it delivers 157 N of push force at 0.5 MPa, fitting light-duty positioning tasks perfectly.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke cushions to decelerate faster moves and shield the end covers from impact shock. The riveted rolling-packed barrel pairs with a two-way grease-retaining piston seal to sustain smooth operation at speeds up to 800 mm/s. A built-in magnet enables position detection, while the rear stopper acts purely as a travel limit, not a load-holding lock.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 175 mm |
| Adjustable window | 100–175 mm (trim 75 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 MBLCJ20X175-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×175 | 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 MBLCJ20X175-75S Is Used
PCB Router Z-Axis
Lifts and lowers a spindle on a PCB depaneling router, using the 100-175 mm stroke window to set exact cutting depth while the air cushion prevents hard stops from jarring the fragile board.
Textile Tension Arm
Adjusts a fabric guide roller on a weaving loom, leveraging the 157 N push force to maintain web tension while trimming the 75 mm rear stopper to match varying fabric roll diameters.
Label Applicator Stop
Cycles rapidly to halt moving cartons on a packaging conveyor, where the dual adjustable cushions absorb the kinetic energy of the 175 mm stroke to protect the aluminum end covers.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X175-75S the Right Cylinder?
If you need less force, stepping down to the 20 mm bore's nearest neighbor is not possible as it is the smallest available; however, stepping up to the 25 mm bore yields a higher 245 N push at 0.5 MPa for heavier resistance. Choose this MBLCJ over the MBLJ when your cycle speed demands shock-absorbing deceleration rather than a simple fixed bumper, or over the MBLC when you need on-the-fly stroke trimming within that 100-175 mm window.
Remember that neither the rear travel stopper nor the adjustable cushion acts as a lock; the rod will drift without live air pressure, so external guides or clamps are required to hold a load. Mounting is limited to Basic, FA flange, or LB foot brackets, as no SDB pivot or back-cover options exist for this series. To replace this exact unit, match the 20 mm bore, 175 mm nominal stroke, 75 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 MBLCJ20X175-75S FAQ
At 0.5 MPa, this 20 mm bore 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.
The adjustable stroke is a rear mechanical stopper that physically limits travel within a 100-175 mm window, whereas the adjustable air cushion is a screw-tunable valve that regulates end-of-stroke deceleration. Neither system locks the load in place; the rod will drift without sustained 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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