
Timing belt Optibelt 25 AT5K6 / 4200 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 25 AT5K6 / 4200 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 25 AT5K6 / 4200 AFX and any equivalents.
This is an Optibelt Alpha Flex timing belt with the part number 25 AT5K6 / 4200 AFX. The marking gives you two things to check against your drive: an AT5 profile and a 4200 mm length. The pitch on this belt is 5 mm.
Profile and length are the two figures that decide whether a timing belt fits. The AT5 profile sets the tooth shape that has to engage the pulleys, and 4200 mm is the length around the belt. If your drive was built for an AT5 belt at 4200 mm, this is the size to match. The 5 mm pitch is the spacing from one tooth to the next.
The most reliable way to confirm the size is to read the marking on the back of the belt you are replacing. Compare it to 25 AT5K6 / 4200 AFX. If the profile and length agree, the belt matches the drive. If the old belt is worn, damaged or the marking is gone, send us the part number you have and we will help you confirm the right belt.
For a quote, send the part number 25 AT5K6 / 4200 AFX by WhatsApp or email, along with the quantity you need. If you are working from a machine manual or a drive tag rather than the belt itself, include whatever reference is on it. We reply promptly and can help confirm the right belt or suggest an equivalent.
Dimensions
- Profile
- AT5
- Pitch
- 5mm
- Length
- 4200mm
Frequently asked questions
- What do the profile and length on this belt mean?
- The AT5 profile is the tooth shape on the belt, and 4200 mm is the length around it. The pitch is 5 mm, which is the distance from tooth to tooth. All three have to match the drive.
- How do I confirm this is the right belt for my drive?
- Read the marking on the back of the belt you are replacing and compare it to 25 AT5K6 / 4200 AFX. If the profile and length match, it is the same size. If the marking is worn off, send us the part number you have and we will help you confirm.
- What do I need to send for a quote?
- Send the part number 25 AT5K6 / 4200 AFX by WhatsApp or email, with the quantity you need. If you are working from a manual or drive tag, include that reference too.

