
Timing belt Optibelt 16 AT3 / 639
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Torque
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Description
OPTIBELT 16 AT3 / 639 belongs to timing belt, 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 16 AT3 / 639 and any equivalents.
The Optibelt Alpha Torque 16 AT3 / 639 is a timing belt with an AT3 profile and a 639 mm length. It is used in drives where synchronous power transmission and precise positioning are required. Confirm fit by matching the profile, length, and width to the original belt.
This timing belt is commonly found in industrial equipment such as CNC machines, automation systems, and precision drives. The AT3 profile and 639 mm length are critical dimensions; the belt must match the original specifications for proper engagement with the pulleys.
To confirm fit, check the marking on the back of the old belt. The part number 16 AT3 / 639 indicates the profile and length, but you should also verify the width and tooth count if needed. If the marking is worn, measure the pitch length and profile to ensure a match.
When ordering, provide the complete part number and any additional drive details. Our team can help confirm the right belt or suggest an equivalent based on the profile and length.
Dimensions
- Profile
- AT3
- Pitch
- 3mm
- Length
- 639mm
Frequently asked questions
- What does the 16 AT3 / 639 part number mean?
- The part number identifies the belt's profile (AT3) and length (639 mm). The 16 likely refers to the width, but always confirm with the old belt's marking.
- How do I confirm this belt fits my drive?
- Match the profile, length, and width to the original belt. Check the back marking or measure the pitch length and profile if the marking is unreadable.
- Can you help if I don't have the part number?
- Yes. Send us the belt's markings, dimensions, and photos of the drive, and we will help identify the correct belt.

