DONGHUA ASA 40/3 roller chain
- Brand
- DONGHUA
- Category
- Power transmission
- Subcategory
- Roller chains
- Size
- ASA 40
- Series
- ASA
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Description
DONGHUA ASA 40/3 belongs to roller chain, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for ASA 40/3 and any equivalents.
When a drive needs to move more load than a single-strand chain can handle at the same pitch, a multi-strand roller chain is often the answer. The DONGHUA ASA 40/3 is a three-strand roller chain built to the ASA series, and MR supplies it to maintenance and purchasing teams that need a defined, repeatable part number for their drives.
Reading the code helps you confirm the fit. ASA 40/3 is a roller chain with a 12.7 mm pitch, a 7.95 mm roller diameter and a 7.95 mm inside width. In the designation, 40 identifies the half-inch pitch size and the 3 tells you the chain carries three strands side by side. That construction raises the power a given pitch can transmit, which is why it shows up where a single strand would be undersized. DONGHUA is one of the brands MR carries.
You will typically find an ASA 40/3 on machine tool drives, chain conveyors, packaging lines, mixers and other systems where two parallel shafts must stay synchronized. Food, chemical and process plants also use it when the chain material and the lubrication suit the surrounding conditions. Because the load is shared across three strands, this chain is a common choice for equipment that must absorb heavier duty without stepping up to a larger pitch.
Installation comes down to three checks. Confirm the sprockets match the series and pitch, and that the number of strands agrees with the chain. Align the shafts within the tolerance the manufacturer recommends. Then set tension: a chain pulled too tight wears rollers and bushings faster, while a slack chain can ride off the sprocket. Lubricate according to speed and load, and track wear by measuring elongation across several pitches.
If you are not sure the ASA 40/3 is the right call, send the full part number, the designation or a photo of the equipment nameplate. From that we can confirm the chain or suggest a different strand count, a different pitch, or a chain with special characteristics. We can also point you to matching sprockets and lubricants for the same installation.
To get a quote on the DONGHUA ASA 40/3, message us on WhatsApp or by email with the part number. If the designation itself is unclear, write anyway, since the system data is usually enough for us to guide you.
Dimensions
- Standard
- ASA / ANSI
- Rows
- Triple
- Pitch
- 12.7mm
- Roller Ø
- 7.95mm
- Inner width
- 7.95mm
Frequently asked questions
- What does ASA 40/3 mean on a roller chain?
- It identifies a size 40 roller chain, which has a 12.7 mm pitch, made with three strands. The 40 sets the pitch under the ASA standard, and the 3 means three parallel strands, so the chain can transmit more power than a single-strand version at the same pitch.
- Will this chain fit my existing sprocket?
- The sprocket has to match the series and pitch, meaning ASA 40 with a 12.7 mm pitch, and it must be cut for the same number of strands. A single-strand sprocket will not accept a three-strand chain. Send us the sprocket part number and we will confirm.
- What lubrication should I use on an ASA 40/3 chain?
- That depends on the speed and the load at which the drive runs. As a rule, apply oil or grease of a suitable viscosity to the rollers and bushings on a regular schedule. In hot, dirty or otherwise demanding environments, ask us and we will help you pick a lubricant for the conditions.