Weigh the suspended stack, not just the tool body
Industry selection guides start with total suspended weight: tool, chucks or sockets, and trailing pneumatic hose or power cable. BalancerKG adds tool_kg + hose_kg, then maps the total into published spring ranges on verified VEVOR US listings.
Capacity is a range — stay off the ceiling
Spring balancers adjust within a min–max band. Parking a load at the published maximum shortens spring life and raises drop risk. On shared boundaries (3, 5, 9, 15 kg) this site assigns the higher range. Example: tool 3.0 kg + hose 0 → 3–5 kg class, not 1–3 kg.
Anchorage, travel, and tension
Hang from a rated overhead point or trolley; many makers require a secondary safety cable. These consumer listings commonly publish ~1.5 m spring travel — confirm reach for your workstation. After install, adjust tension so the tool floats without slamming home.
What this screen never claims
A matched class is not a lift plan. Spring balancers offset hanging tool weight; they are not hoists for raising loads, not motorcycle wheel balancers, and not harmonic-balancer pullers. Ratings are manufacturer claims — verify the live listing. Affiliate tracking is pending.
Class ladder on this site
BalancerKG maps totals to five verified VEVOR US spring balancers: 1–3, 3–5, 5–9, 9–15, and 15–22 kg. Sources reviewed include manufacturer capacity claims on the linked listings checked 2026-09-10, plus selection guidance from industrial balancer vendors on weighing hose/cable and preferring mid-range duty.