Description
639-3M-420 Timing Belt
The 639-3M-420 is a timing belt from D&D Global's Dura-Sync Torque - 3M Series line. It transmits power positively with no slip, holding timing between shafts on synchronous drives.
| Specification | Value |
|---|---|
| Part Number | 639-3M-420 |
| Belt Type | Timing Belt |
| Tooth Profile | 3M HTD (curvilinear) |
| Tooth Pitch | 3 mm |
| Number of Teeth | 213 |
| Belt Width | 420 mm |
| Pitch Length | 639 mm (Pitch Length) |
| Construction | Chloroprene (Neoprene), Fiberglass cord, fabric tooth cover |
| Weight | 4.255 lb |
Applications
- Conveyors and indexing drives
- Pumps, compressors, and blowers
- Packaging, processing, and automation equipment
- Positive drives where timing must stay locked with no slip
Browse the full range in Timing Belts, or use our belt identification guide to match an existing part.
Cross-Reference
639-3M-420 is a standardized industry size, so a 639-3M-420 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves. For OEM or proprietary numbers, confirm the equivalent before ordering — call (888) 203-2358.
All manufacturer names and part numbers are used for reference and identification purposes only. Texas Belting & Supply is not affiliated with, sponsored by, or endorsed by any other manufacturer.
Frequently Asked Questions
What is 639-3M-420 used for?
639-3M-420 is a timing belt used on positive, no-slip drives such as conveyors, pumps, packaging machinery, robotics, and machine tools. Synchronous belts hold timing between shafts, so they suit applications where slip is unacceptable.
What are the dimensions of 639-3M-420?
639-3M-420 has a 3 mm tooth pitch, 213 teeth, a belt width of 420 mm, and a 639 mm (Pitch Length). The pitch length is the pitch-line circumference.
What does the 3M in 639-3M-420 mean?
3M is a HTD (curvilinear) synchronous tooth profile. The belt must match the pulley, so a 3M belt runs only on 3M pulleys.
Does 639-3M-420 ship from Houston?
Yes. 639-3M-420 ships from our Houston, Texas warehouse, with same-day shipping on in-stock items. Call (888) 203-2358 to confirm stock and request a quote.
Need a quote on 639-3M-420?
Houston warehouse — same-day shipping on stock items.
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