Morse 643903 — Cam Clutches
Morse 643903 - Cam Clutches - Width: 4.4 mm; Length: 4.8 ft; Height: 3.4 mm.
This listing covers the Morse 643903, a part number in the Cam Clutches category. The manufacturer's published data for this part number specifies Width: 4.4 mm and Length: 4.8 ft.
Key manufacturer data on file for this item includes Height: 3.4 mm; Mode of operation: High Speed inner race overrunning; Type: CAM Clutches; Model: MO; Product type: M Series; Bore Size (in): 0.75; Outer Width (in): 2.625; Bore (Max) (in): 0.875; Bore (Min) (in): 0.625; Additional Bearing Support Requirement: No; Backstopping Clutch: Yes; Indexing Clutch: Yes. The complete technical table is shown in the Specifications tab on this page.
| Additional Bearing Support Requirement | No |
|---|---|
| Backstopping Clutch | Yes |
| Bore (Max) (in) | 0.875 |
| Bore (Min) (in) | 0.625 |
| Bore Size (in) | 0.75 |
| Clutch size code | 400 |
| Height | 3.4 mm |
| Indexing Clutch | Yes |
| Inner Race Width (in) | 2.75 |
| Length | 4.8 ft |
| Lubrication Type | Grease |
| Mode of operation | High Speed inner race overrunning |
| Model | MO |
| Nominal Overrunning Drag (ft-lb) | 0.21 |
| Outer Width (in) | 2.625 |
| Overall Diameter (in) | 3.5 |
| Overrunning Clutch | Yes |
| Product type | M Series |
| Rated Torque Capacity (ft.-lbs.) | 400 |
| RPM Max. - Inner Race | 3600 |
| RPM Max. - Outer Race | 800 |
| Type | CAM Clutches |
| Width | 4.4 mm |
Request a quote for this part
Email [email protected] or call (825) 454-5367 for pricing and availability.
Frequently Asked Questions
How do I get pricing for 643903?
KKM Solutions is a quote-based industrial supplier, so prices are not listed online. Send the quote form on this page with your quantity, or email [email protected], and our order desk will reply with pricing and availability within 1 business day.
Who manufactures the 643903?
643903 is a Morse part. KKM Solutions sources Morse components to the exact manufacturer specification and cross-checks every order against manufacturer part data before it ships.
Is 643903 discontinued, and can I still get one?
KKM Solutions does not publish a manufacturer lifecycle status for 643903 — check Morse's own product page for whether it is current, superseded, or end-of-life. It does not change what we can do: we source current-production, superseded and long-obsolete parts the same way, and where a part is genuinely unavailable we identify a form-fit-function equivalent. Send the part number through the quote form on this page, or use our obsolete part lookup at https://kkmsolutions.com/tools/obsolete-part-lookup/.
What are the key specifications of 643903?
Key specifications include Additional Bearing Support Requirement: No; Backstopping Clutch: Yes; Bore (Max) (in): 0.875; Bore (Min) (in): 0.625. The full specification table on this page lists every published attribute for this part.
How quickly can 643903 ship?
In-stock items are dispatched the same business day for orders placed by 11 AM; sourced and quoted items ship per the quoted lead time. KKM Solutions ships worldwide — to your site, warehouse, or freight forwarder.
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