
The AirTAC Airtac ACQJ80-100 Adjustable Compact Cylinder ACQJ80X90-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø80mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
The AirTAC ACQJ80X90-40S is a double-acting, single-rod JIS compact cylinder featuring an external threaded stop with a lock nut to precisely limit the extend stroke. You can fine-tune the usable extend range from 50 mm up to the full 90 mm directly on your machinery without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of this 80 mm bore. The cylinder delivers 2513.2 N push and 2267.8 N pull at 0.5 MPa. It features a 25 mm piston rod, a PT3/8 port, fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration, and an integrated magnet (-S) for position sensing.
| Model | Airtac ACQJ80-100 Adjustable Compact Cylinder ACQJ80X90-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø80 mm |
| Full stroke | 90 mm |
| Adjuster thread | M20×1.5 |
| Port size | PT3/8 |
| 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 | M16×2.0 (F) / M22×1.5 (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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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.
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×90 | 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).
Dial in the exact extend endpoint on a machining fixture to accommodate different raw material thicknesses without fabricating custom stop collars.
Modify the extend position rapidly during packaging line product changeovers to set new physical reject or diversion guard locations.
Establish trial end positions on an assembly press, testing various engagement depths before finalizing the mechanical hard stop.
When sizing this model, dropping to a 63 mm bore yields 1558.6 N push at 0.5 MPa, whereas stepping up to a 100 mm bore provides 3927.0 N push at 0.5 MPa. If your process never requires altering the extend endpoint, a fixed-stroke ACQ cylinder will suffice. To order, confirm the 80 mm bore, 90 mm full stroke, 40 mm adjustment window, the -S magnet option, and the default female M16x2.0 rod-end thread.
Quick checklist
The usable extend range is 50-90 mm (90 mm full stroke minus the 40 mm window). Force is identical to a standard ACQ: push is 2513.2 N and pull is 2267.8 N at 0.5 MPa, push is 3518.5 N at 0.7 MPa, and maximum push is 513 kgf at 1.0 MPa.
An external M20x1.5 threaded adjuster with a lock nut limits the extend stroke; force remains unchanged because the piston area is not altered. Fixed NBR elastomer bumpers handle deceleration at both ends, and the built-in -S magnet works with reed or electronic solid-state switches.
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