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CHECK PINS

Access to the Access to the

introduction introduction

by Manga. by Manga.

Please check the hole size before tapping!

Let's check the hole size before tapping 6H class internal threads of M6×1 by using Check-pin for cutting taps.

  • How to use CPC-S (Straight type) STEP1

Check the minor dia. for M6×1 6H internal thread

STEP2

Size of the Check-pin for M6×1 Select the nearest sizes of the Check-pins to the

max and min size of minor dia of 6H internal

ｄ1 ｄ2 thread by checking the table listed on the left side.

Size L ℓ DS （Percentage of Thread （Percentage of Thread

Engagement）Engagement）⇒ ①4.917（100％） and ②5.134（80％）
4.917（100％）5.026（90％）
4.972（95％）5.080（85％）Depending on the feature of work-piece materials, it
6 16.5 73 M6 ×1 5.026（90％）5.134（80％）is beneficial to tapping to make the hole size before
5.080（85％）5.188（75％）
（％）（ ％）tapping as large as possible and within the tolerance.
5.134805.24270

STEP3 Insert the Check-pins ① and ②, selected in step 2. ① 4.917 ② 5.134 GOOD The hole is finished within minor

（100％） （80％）

dia of 6H class internal threads.

1.5Ｄ

You can easily check hole

2Ｄ

Check-pin smoothly goesCheck-pin doesn'tdepth by the three lines on
2.5Ｄ
into the bottom of the hole.go into the hole.its pin as well.
  • How to use CPC-T (Taper type)

ｄ1 ｄ2 Product

SizeLℓDS（Percentage of Thread （Percentage of Thread（ℓ1）（ℓ2）
Code
Engagement）Engagement）
M6 ××161.51764.917×（100％）5.153（78％）CPCT6.0M3.812.8

BAD BAD GOOD

Acceptable range Minimum Maximum

Bad hole : Check-pinBad hole : Check-pinlineline
4.9175.153
doesn't go into the holegoes into the hole over（100%） （78%）

over the minimum line. the maximum line.