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Quality · International tolerance specs

Precision Standards

ISO 1328 · DIN 3962 · AGMA 2000 · JIS B 1702 — and how their classes map to each other.

Customers from different regions arrive with different tolerance languages. Wolfer cuts and inspects to ISO 1328 by default, and provides documented translations to DIN, AGMA, and JIS classes when the customer drawing specifies them.

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Class translations are approximate — different standards measure pitch, profile, and lead error differently, so a perfect 1-to-1 map doesn't exist. For high-stakes orders we always cut to the customer's named standard and provide the inspection report in that standard's units.

Quality

Standards we work against

ISO 1328-1:2013

Cylindrical gear accuracy — the modern international default. Classes 1 (highest) to 11 (lowest). Wolfer routinely produces Class 5–8.

DIN 3962 / 3963

German gear-tolerance system. Used by many European OEMs. Translates approximately to ISO 1328 Class 4–9.

AGMA 2000-A88

Older American standard. Classes Q3 (lowest) to Q15 (highest). Maps roughly to ISO 1328 Class 12 down to Class 2.

AGMA 2015

Newer American replacement for AGMA 2000, with class definitions closer to ISO 1328. We translate either way for US customers.

JIS B 1702-1

Japanese standard — used by Japanese OEM customers and their Chinese subsidiaries. Maps closely to ISO 1328.

KHK / KISSsoft sizing

For non-standard module / pressure-angle gears, we accept KISSsoft or KHK design output as the input drawing.

Quality

Class crosswalk — approximate, for guidance

ISO 1328
AGMA 2000 (Q)

Class 4 (very high)

Q13 / Q14

Class 5

Q12 / Q13

Class 6 (Wolfer default ground)

Q10 / Q11

Class 7

Q9 / Q10

Class 8

Q8 / Q9

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Every part measured before it ships. PREC60 gear measuring center, CMM, hardness, surface.

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Traceability

Every shipment carries a lot code that traces back to the steel heat number.

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