The SMC CDQ2B40-40DZ is a genuine SMC part (CQ2 Z Series Compact Cylinder: Standard Type Double Acting, Single Rod): Compact Cylinder, Bore 40 mm, Stroke 40 mm, Double Acting, Built-in Magnet.
The CQ2 is SMC’s standard compact cylinder: a double-acting, single-rod design with through-hole mounting and auto-switch grooves on the body.
More SMC pneumatic components: SMC range.
Technical data
| SMC part number | CDQ2B40-40DZ |
|---|---|
| Series | CQ2 Z Series Compact Cylinder: Standard Type Double Acting, Single Rod |
| Built-in Magnet | Built-in Magnet |
| Mounting Style | Through-hole (Standard) |
| Type | Pneumatic |
| Bore Size | Bore Size 40 mm |
| Port Thread Type | Rc/M Thread |
| Cylinder Stroke | Standard Stroke 40 mm |
| Body Option | Standard (Rod End Female Thread) |
| Auto Switch Mounting Groove | Φ12-Φ25 2 Sides/Φ32-Φ100 4 Sides |
| Made To Order | Standard |
| Replacement parts (SMC) | GR-S-010 Grease Pack; CQ2B40-PS Replacement Parts Seal Kit |
| Brand | SMC |
| Condition | New, original |
Series features (per SMC)
- Sizes Φ4, Φ6, and Φ10 have been added [New]
- Φ4 to Φ200 lineup
- Space-saving cylinder designed with a compact body
- It is possible to mount small auto switches on 4 surfaces. (2 surfaces
- No projection of auto switch
- Lighter weight: Reduced by 5 to 13% (compared with the existing
Typical applications
- Pressing and ejecting in assembly machines
- Stoppers on conveyors
- Positioning in packaging machines
- Clamping and holding fixtures
- Replacement of an identical cylinder
Compatibility and replacement
Order with the complete SMC part number CDQ2B40-40DZ; in SMC codes every character of the number (bore, stroke, magnet, mounting) is a separate choice, so a part with one different character is a different product.
The decode in the table comes from SMC’s official part-number check; the full catalogue data (pressure range, temperature, dimensions) is in the SMC catalogue we can send with the quotation.
What to check first
- Auto switch type and quantity
- Bore size and stroke
- Built-in magnet (D) for auto switches
Frequently asked questions
What does “Z” stand for in the part number (auto switch mounting groove)?
Auto Switch Mounting Groove: Φ12-Φ25 2 Sides/Φ32-Φ100 4 Sides, according to SMC’s part-number data.
What does “40” stand for in the part number (cylinder stroke)?
Cylinder Stroke: Standard Stroke 40 mm, according to SMC’s part-number data.
What does “40” stand for in the part number (bore size)?
Bore Size: Bore Size 40 mm, according to SMC’s part-number data.
What does “B” stand for in the part number (mounting style)?
Mounting Style: Through-hole (Standard), according to SMC’s part-number data.
Are spare parts available?
Yes. SMC lists these replacement parts for it: GR-S-010 (Grease Pack), CQ2B40-PS (Replacement Parts Seal Kit).
Is it new and original?
Yes. We supply new, original parts in the manufacturer packaging, with a 1-year warranty.
Do you ship to my country, and what is the warranty?
Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.
How to order
Message us the order number and quantity. For breakdowns, tell us the delivery address and we will offer the fastest shipping option. If the exact part is discontinued, we confirm the official successor before quoting.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.





