The Multiquip SP5601 Key 3/16" Sq x 1" Lg is a genuine OEM replacement designed for the STOW SDP-2 diaphragm pump. Sourced directly from Multiquip, this drive key ensures a properly seated, torque-transferring connection between the shaft and mating component exactly as the machine was engineered. If you're servicing an SDP-2 and need to restore proper shaft engagement, SP5601 is the correct OEM specification part for the job.
Key Features
- Genuine OEM Material Spec — Manufactured to the same hardness and dimensional tolerances as the original, ensuring full load transfer without deformation under operating torque.
- Drop-In Shaft Fit — Matches the 3/16" square keyway profile and 1" length of the original keyway slot, seating cleanly without filing or shimming.
- Confirmed SDP-2 Fitment — Verified for use on the STOW SDP-2 diaphragm pump; cross-reference part number SP5601 before ordering.
- Restores Full Power Transmission — A worn or sheared drive key allows shaft slippage, causing erratic or lost pump output; replacing it with this part restores positive drive engagement.
- Critical Driveline Integrity — A correctly installed key prevents relative rotation between shaft and hub, protecting both components from accelerated wear and potential shaft damage.
A drive key is a small but essential component that locks a rotating shaft to a hub, gear, or impeller, transmitting torque between the two without slippage. In a diaphragm pump like the SDP-2, the key ensures the pump mechanism is driven in direct sync with the motor shaft. When a key shears or wears, drive torque is lost, output becomes inconsistent, and the shaft and hub bore can be damaged by the resulting metal-on-metal contact. Replacing a failed key promptly with the correct OEM part protects the surrounding driveline components from secondary damage.
Part Details
| Part Number | SP5601 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key 3/16" Sq x 1" Lg |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
