ACME & Stub ACME — detail
Gauge family 06 / 11

ACME & Stub ACME gauges, manufactured in Pune.

ASME B1.5ANSI B1.8ACME 29° · ASME B1.5 / Stub ACME · ANSI B1.8

An ACME thread gauge checks ACME power threads, which have a 29° thread angle, to ASME B1.5, and Stub ACME threads to ANSI B1.8. Accusize manufactures ACME and Stub ACME gauges in Pune.

ACME power thread gauges to ASME B1.5 and Stub ACME to ANSI B1.8. 2G is the common class; 3G and 4G are available where less backlash is required.

ACME thread height
0.5p
Stub ACME height
0.3p
Representative sizes & classes
TypeStandardClasses
ACMEASME B1.52G · 3G · 4G
Stub ACMEANSI B1.82G · 3G · 4G

GO gauge

Enters and passes the complete length of the thread, screwed by hand without excessive force.

NOT-GO gauge

May not enter more than two turns from either end, screwed by hand without excessive force.

Ground on our Matrix thread grinders and verified on TRIMOS H4 before every certificate is issued.

About this gauge

ACME & Stub ACME: what they are and how to choose

ACME threads are used where a thread transmits motion or load, such as lead screws. The class sets the fit: 2G is the common class, and 3G and 4G are used where less backlash is needed.

Stub ACME has a shorter thread height of 0.3p, against 0.5p for standard ACME.

Share the size, pitch and class on the quote page and we will confirm the gauge.

Common questions

Questions about ACME & Stub ACME

What are ACME & Stub ACME?

An ACME thread gauge checks ACME power threads, which have a 29° thread angle, to ASME B1.5, and Stub ACME threads to ANSI B1.8.

Which standard does it follow?

Manufactured to ASME B1.5, ANSI B1.8.

What range is available?

Available ranges: ACME thread height 0.5p; Stub ACME height 0.3p.

How does GO / NOT-GO acceptance work?

The GO member must enter and pass the complete length of the thread by hand, without excessive force. The NOT-GO member may not enter more than two turns from either end.

What do the 2G, 3G and 4G classes mean?

They are fit classes for ACME threads. 2G is the common class, and 3G and 4G are tighter, for less backlash.

Is ACME the same as trapezoidal?

No. ACME has a 29° angle to ASME B1.5, and metric trapezoidal has a 30° angle to DIN 103-9. They need different gauges.

Do you supply outside Pune?

Yes. We supply across India and take enquiries from outside India too. See the where we supply page for details.

How do I request a quote?

Share the thread size and standard on our quote page and we will confirm class, availability and pricing within one business day.

Related

Other gauge families

Trapezoidal gaugesValve thread gaugesMetric thread gauges
Gauge manufacturer in IndiaHow to Choose the Right Thread GaugeACME vs Trapezoidal Threads: The DifferenceGeneral engineering

Need acme & stub acme?

Share your thread, standard or drawing and get the right acceptance class, certified. We supply across India and take enquiries from outside India too, see where we supply.