
Timing belt Optibelt 16 AT5K6 / 4000 AFX
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Flex
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Description
OPTIBELT 16 AT5K6 / 4000 AFX 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 AT5K6 / 4000 AFX and any equivalents.
When you need a replacement timing belt, sending the right details speeds up the quote. The Optibelt 16 AT5K6 / 4000 AFX is part of the Alpha Flex series, with an AT5 profile, a 4000 mm length, and a 5 mm pitch. Use this page to confirm the markings on your belt and request a quote by part number.
To request a quote, send the complete part number: 16 AT5K6 / 4000 AFX. Include the quantity you need and any drive details you have, such as the application or the existing belt's condition. If you are replacing a belt on a driven system, note whether you are also changing pulleys or tensioners.
The AT5 profile indicates a timing belt with a 5 mm pitch. The 4000 mm length is the datum length for this belt. The Alpha Flex series is designed for synchronous drives. This belt is not a V-belt or a Poly-V belt; it is a timing belt, also called a synchronous belt.
If you are unsure whether this is the correct belt, check the markings on the back of your old belt. The part number 16 AT5K6 / 4000 AFX should be printed or stamped on the belt. You can also measure the length and pitch to confirm. Send a photo of the marking if that helps.
We carry Optibelt belts and can help you confirm the right timing belt for your drive. Send your request by WhatsApp or email with the part number and any supporting details. Our team replies promptly and can suggest an equivalent if needed.
Dimensions
- Profile
- AT5
- Pitch
- 5mm
- Length
- 4000mm
Frequently asked questions
- What information should I include when requesting a quote for this belt?
- Provide the full part number 16 AT5K6 / 4000 AFX, the quantity required, and any drive details such as the application or pulley information. If you have the old belt, include a photo of its markings.
- How can I confirm that this is the correct belt for my drive?
- Check the marking on the back of your existing belt. It should read 16 AT5K6 / 4000 AFX. You can also verify the profile (AT5), pitch (5 mm), and length (4000 mm) against your drive specifications.
- Can you help if I need a different length or profile?
- Yes. Send us the details of the belt you need, including profile, pitch, and length, and we will help you find a matching timing belt.

