# Univex SRM20 Mixer: Used-Buy Risk, Parts & What to Check | KitchenRisk

> Univex SRM20 mixer used-buy guide: OEM-documented failure causes (overload, lubrication, belt slip), confirmed $35.38 belt part, and a pre-purchase checklist.

**Verdict:** inspect

No verified used-market price found (parts confirmed: $35.38 OEM cog belt); Univex's own manual names overloading the #1 cause of mixer failure and missed 500-hour lubrication the #2 cause — inspect belt tension, Swing Ring safety-guard switches, and speed-change habits before buying.

**Documented failure risks:**
- Overload / drive belt and gear train: OPERATOR'S PREVENTIVE MAINTENANCE: "Do not overload the mixer. Overloading is the #1 cause of mixer failure. Follow the Table of Mixing Capacities on pages 8. It may be helpful to post a copy of this table adjacent to the mixer."
- Lubrication of beater shaft and key components: OPERATOR'S PREVENTIVE MAINTENANCE: "Keep the mixer properly lubricated. Lack of lubrication is the #2 cause of mixer failure. Key mixer components require lubrication after each 500 hour of operation."
- Speed-change belt slippage: "Only change speeds with the mixer running. Changing speeds with the mixer off will cause the belts to loosen, and the mixer will not turn properly (see the Trouble-Shooting Guide on page 12)."

## Sources
- [partstown.com](https://www.partstown.com/modelManual/UNI-SRM20_spm.pdf) (accessed 2026-09-14)
- [partstown.com](https://www.partstown.com/m/univex/srm20) (accessed 2026-09-14)
- [partstown.com](https://www.partstown.com/univex/uni1020501) (accessed 2026-09-14)

_Last verified 2026-09-14. Source: KitchenRisk — https://kitchenrisk.com/models/univex-srm20/ — every claim checked against a primary source before publication (see /methodology/)._