
Timing belt Optibelt 300 / H 4645 AFX
- Brand
- OPTIBELT
- Category
- Power transmission
- Subcategory
- Timing belts
- Series
- Alpha Flex
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Description
OPTIBELT 300 / H 4645 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 300 / H 4645 AFX and any equivalents.
This Optibelt Alpha Flex belt is a timing belt with an H profile and a length of 11798.3 mm. The part number 300 / H 4645 AFX identifies the exact belt you need to match or replace.
For a maintenance or purchasing professional, the two critical specifications are the profile and the length. The H profile determines how the belt seats in the pulley grooves, and the 11798.3 mm length must match the drive's center distance and take-up. Both values are fixed for this item: H profile, 11798.3 mm. If your current belt carries the same marking, this is the correct replacement.
When you request a quote, send the full part number 300 / H 4645 AFX and confirm the profile and length from the old belt. Our team can help verify the belt or suggest an equivalent based on the data you provide. We carry Optibelt Alpha Flex timing belts and serve customers across the United States, Canada, Mexico and South America.
Dimensions
- Profile
- H
- Length
- 11798.3mm
Frequently asked questions
- What do the profile and length mean for this belt?
- The profile is H, which defines the tooth shape and pitch. The length is 11798.3 mm. Both must match your drive for the belt to run correctly.
- How do I confirm this is the right belt for my application?
- Read the marking on the back of your existing belt. If it shows 300 / H 4645 AFX, this is the direct replacement. If you are unsure, send the part number and any photos to our team for confirmation.
- What information should I send with my quote request?
- Send the part number 300 / H 4645 AFX, the profile H and the length 11798.3 mm. If you have the old belt, include a photo of the back marking. We will reply promptly with a quote or an equivalent suggestion.

