Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø25mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ25 mm
- Full stroke40 mm
- Port sizeM5×0.8
- Adjuster threadM10×1.25
- 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB
The AirTAC ACQJ25X40-40SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 0 up to 40 mm on the machine without swapping parts, while the retract stroke remains completely unaffected. The piston area stays the same, so output force equals a standard ACQ of this bore.
This bore 25 unit pushes 245.4 N and pulls 188.9 N at 0.5 MPa, with a maximum push capacity of 50 kgf at 1.0 MPa. It includes a male M10x1.25 rod end (-B) for direct load coupling and a built-in piston magnet (-S) for position sensing. Deceleration relies on a fixed elastomer bumper at each end rather than an adjustable air cushion.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø25 mm |
| Full stroke | 40 mm |
| Adjuster thread | M10×1.25 |
| Port size | M5×0.8 |
| 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 – 500 mm/s |
| Rod thread | M6×1.0 (F) / M10×1.25 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 189 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×40 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB Is Used
Variable Gauge Stops
Set precise extend endpoints from 0 to 40 mm when adapting packaging lines to different carton widths.
Product Changeover
Rapidly reposition the extend limit on assembly fixtures during a shift change without fitting new spacers.
Trial End Positions
Dial in the exact pushing distance on a CNC loader during initial tooling setup before locking the nut.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB the Right Cylinder?
If your setup only requires a fixed end position, a standard ACQ cylinder will suffice. Choose this adjustable model when trial end positions or product dimensions vary. For sizing, stepping down to a bore 20 unit provides 157.1 N push at 0.5 MPa, while stepping up to a bore 32 unit yields 402.1 N. Confirm your ordering essentials: 25 mm bore, 40 mm full stroke, 40 mm adjuster window, the -S magnet, and the -B male M10x1.25 rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ25X40-40SB FAQ
It delivers a push of 245.4 N and a pull of 188.9 N at 0.5 MPa, with a push of 343.6 N at 0.7 MPa. The maximum push is 50 kgf at 1.0 MPa. The full stroke is 40 mm with a 40 mm adjustment window, giving a usable extend range of 0 to 40 mm.
An external M10x1.25 threaded stop with a lock nut limits the extend length, leaving the retract stroke unaffected. Because the piston area remains unchanged, the output force is identical to a standard ACQ. The cylinder uses a fixed elastomer bumper for end deceleration, and the -S magnet works with reed or electronic solid-state switches.
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 ACQJ Compact Cylinders
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