,

Eisen SPO Series Limit Screw Gauge

Made in Japan
Manufacturer: Eisen Co., Ltd.
Model: SPO Series

One-way thread gauge 2→1

About the Series

Improved work efficiency with 2→1 action measurement!

SPO Series

Conventional plug gauges measure GO and NO by two actions, but this allows measurement with one action, improving work efficiency. If the GO side thread plug gauge can be inserted smoothly and stops at the stopper end face, it is judged as pass.
The GO side is a guide, so erroneous judgment of the NO side can be prevented.

Features

  • Comes with a detachable hex handle.
  • The handle has a left-handed screw mechanism to prevent over-tightening.
  • You can also remove the hexagonal handle and use it by holding the stopper (made of stainless steel).
  • The material used is gauge steel (SK33, HRC58 or higher), which has excellent wear resistance.
  • To ensure our customers’ trust and peace of mind, an inspection report is included.

How to use

If the GO side thread plug gauge can be inserted smoothly into the threaded hole and stops at the stopper end face, it is judged as pass.

One-way thread gauge

Example of notation 

Thread NominalpitchThreaded section L1Stopper part L2Stopper part φDHexagonal handle part L3Hexagonal handle part HGauge TypeGrade
M1.40.3Regular36.5Four30TenGPIP

GPWP

GPNP

6H

[5H]

M1.60.35Regular3.56
M1.70.35Regular
M1.80.35Regular
M20.4RegularFour77
M2.30.4Regular
M2.50.45Regular4.56.5
M2.60.45Regular
M30.5RegularFive6
M40.7Regular79840
M50.8Regular88
M61.0RegularTen9Ten
M71.0Regular
M81.25Regular12.5Ten12
M81.0DetailsTen12.5
M101.5Regular15111412
M101.25Details12.513.5
M101.0DetailsTen16
M121.75Regular17.511.516
M121.5Details1514
M121.25Details12.516.5
M142.0Regular20121817
M141.5Details1517
M162.0Regular201220
M161.5Details1517
M182.5Regulartwenty five13twenty two
M181.5Details15twenty three
M202.5Regulartwenty five13twenty four
M201.5Details15twenty three
  • *We can also manufacture special dimensions (fine, extra fine, unified, pre-plated settings, etc.).
  • (Fine, extra fine, unified, helical insert, pre-plating setting, etc.)
Custom One-Way Thread Gauge

Example of notation 


Thread Nominalpitch Thread gauge length K
(specified in 0.1 mm increments)
Threaded section
L1
Stopper part
L2
Stopper part
φD
Hexagonal
handle part
L3
Hexagonal
handle part
H
Gauge TypeGrade
M1.40.3Regular1.2 – 5.0K+ 3P6.5Four30TenGPIP

GPWP

GPNP

6H
[5H]

M1.60.35Regular1.4 – 5.06
M1.70.35Regular1.4 – 5.0
M1.80.35Regular1.4 – 5.0
M20.4Regular1.6 – 7.077
M2.30.4Regular1.6 – 7.0
M2.50.45Regular1.8 – 9.06.5
M2.60.45Regular1.8 – 9.0
M30.5Regular2.0 – 9.06
M40.7Regular2.8–12.59840
M50.8Regular3.2–12.58
M61.0Regular4.0 – 17.59Ten
M71.0Regular4.0 – 17.5
M81.25Regular5.0 – 20.0Ten12
M81.0Details4.0 – 20.012.5
M101.5Regular6.0 – 25.0111412
M101.25Details5.0 – 25.013.5
M101.0Details4.0 – 25.016
M121.75Regular7.0 – 30.011.516
M121.5Details6.0 – 30.014
M121.25Details5.0 – 30.016.5
M142.0Regular8.0 – 32.0121817
M141.5Details6.0 – 32.017
M162.0Regular8.0 – 32.01220
M161.5Details6.0 – 32.017
M182.5Regular10.0 to 36.013twenty two
M181.5Details6.0 – 36.0twenty three
M202.5Regular10.0 to 40.013twenty four
M201.5Details6.0 – 40.0twenty three
  • *We can also manufacture special dimensions (fine, extra fine, unified, pre-plated settings, etc.).
  • (Fine, extra fine, unified, helical insert, pre-plating setting, etc.)

Special Shaped Products

Simultaneous determination of screw hole concentricity

Thread and pilot hole measurement

Helical (planet) tap machining allowance measurement

\

Calibration Procedure

Although the gauge part on the NO GO side only has two pitches, it can be disassembled and calibrated in the same way as a standard thread gauge.
No special tools are required for disassembly.

1. Remove the stopper.
2. Measure the go-through side with a three-wire gauge.
3. Measure the stop-through side with a three-wire gauge.
4. Attach the stopper.

REQUEST QUOTATION

PAYMENT

payment-methods

Return Top