Decision status
inspect
$59,000–$70,000 observed used. Biggest documented cost risk: Broken/trashed backing plates on both chucks by the time of. Buy only after inspection.
Confidence 60%CNC lathe
Haas ST-20: Used-Buy Risk, Repairs & What to Check
Used Haas ST-20 buying guide, prices $59,000-$70,000, broken/trashed backing plates on risk, repair costs and what to inspect.
Market context
Not yet verified
2 observed comparables
As of Aug 19, 2026Failure & Downtime Exposure
What can make the cheap machine expensive?
Broken/trashed backing plates on both chucks by the time of teardown
Cost not yet verifiedRail covers and rails needing replacement; general chips/cable/motor/linear-guide
Cost not yet verifiedBed twist requiring a laser-level tool and machinist jacks to correct during
Cost not yet verifiedHydraulic Power Unit (HPU) troubleshooting — official Haas Automation service video
Cost not yet verified"What To Do if Your Lathe is Cutting a Taper" — Haas Automation official service tip
Cost not yet verifiedCommon questions
How much does a used Haas ST-20 cost?
Observed listings range roughly $59,000 to $70,000 depending on age, condition, and configuration (as of 2026-08-19).
What fails on the Haas ST-20?
The most cited concerns in our evidence record: Broken/trashed backing plates on both chucks by the time of, Rail covers and rails needing replacement; general chips/cab, Bed twist requiring a laser. See the risk breakdown above for details and sources.
From the research record
- PRICE: - Used market average: ~$59,000-$70,000. https://premierequipment.com/brands/haas-lathe/ - New price: TODO: unsourced (not gathered this pass; Machinio fetch blocked, see below). - Machinio model page (https://www.machinio.com/models/haas/st-20) returned HTTP 403 Forbidden this pass — TODO: unsourced (Machinio fetch failed). - MachineStation (https
- FAILURES: - No video evidence directly named "ST-20" was found in this pass. The evidence set's dominant video, "ST30 Lathe Rebuild and Alignment" (CNC Repairman channel), documents a full rebuild of a Haas ST-30 — a LARGER machine one size class above the ST-20 in the same ST-series family. Using it only as a same-family proxy for what fails on Haas turret
- REPAIR: - No Haas ST-series-specific spindle rebuild-vs-replace cost data was found. The one cost-band source located (Midwest CNC Services) is framed around Haas VF-series MILLING spindles, not ST-series lathes — cited here only as general Haas-brand spindle cost context, NOT lathe-specific: - Haas VF-series rebuild: $4,800-$7,200. Haas VF-series full rep
- LIFE: - TODO: unsourced — no ST-20-specific expected-life figure gathered this pass.
- VIDEO (00:00:22 https://www.youtube.com/watch?v=Pd-oYTca-5A): "course now you may have seen or heard complaints of pumps being noisy and even"
- VIDEO (00:00:25 https://www.youtube.com/watch?v=Pd-oYTca-5A): "complaints of pumps being noisy and even"
- VIDEO (00:00:25 https://www.youtube.com/watch?v=Pd-oYTca-5A): "complaints of pumps being noisy and even in some cases the pressure gaug is"
Sources
- premierequipment.comweb · research-cited · accessed 2026-08-19
- machinio.comweb · research-cited · accessed 2026-08-19
- machinestation.usweb · research-cited · accessed 2026-08-19
- exapro.comweb · research-cited · accessed 2026-08-19
- youtube.comweb · research-cited · accessed 2026-08-19
- youtube.comweb · research-cited · accessed 2026-08-19
- youtube.comweb · research-cited · accessed 2026-08-19
- midwestcncservices.comweb · research-cited · accessed 2026-08-19
- r.jina.aiweb · research-cited · accessed 2026-08-19
- Haas SL-20 Lathe Setupvideo-transcript · research-cited · accessed 2026-08-19
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