DIAL BORE GAUGE

Instruction Manual
Model No.：WCDI-10/WCDI-18 ＜combined＞

Thank you for purchasing the Dial Bore Gauge.
Please read this manual thoroughly before use for proper operation.
■ SPECIFICATIONS■ PART IDENTIFICATION
■

Gauge

Bezel

Accessories
0.5mm Washer（WCDI-18 only）
Extension Rod

Pointer（0.01mm）

Gauge
Face

Rev. Cntr.

（WCDI-10）（WCDI-18）(2 rev. = 1mm)

Cap

Clamp
Screw

Spanner

Handle（WCDI-10）（WCDI-18）

Dial Gauge（ｍｍ）
Measuring Range（ｍｍ）
Graduation＊Wide Range Accuracy （μｍ）
（μｍ）
＊Adjacent Error（μｍ）＊Repeat Accuracy（ｍｍ）
Single Stroke Range
Washer（ｍｍ）
Weight（ｇ）＊Including supplied Dial Gauge

WCD I- 10
6〜100. 01
12530. 7
180

WC DI-18
1 0 〜1 80 .0 1
12530 .90 .5195

Extension Rods：
WCDI-10･･･6・6.5・7・7.5・8・8.5・9・9.5・10mm（9 Pieces）
WCDI-18･･･10・11・12・13・14・15・16・17・18mm（9 Pieces）※Spanners shown in drawing above
vary slightly in appearance, butfunction will be same.

Length below Handle
100 mmExtension Rod50 mm

Shaft

Length below Handle

NOTICE

Measurement
Probe Tip
Head（WCDI-10）
Extension Rod

Probe Tip

Measurement
HeadGuide（WCDI-18）■ ASSEMBLY① Loosen the Clamp Screw and insert the Dial Gauge
until the Pointer rotates 1/10 turn or more. Tighten theClamp Screw to secure.
1/10 rotation
or more● This is a precision instrument, handle with care.
● Do not disassemble or modify.
● Keep instrument away from water and oil.
● Use only with supplied Extension Rods and Washer.
● Keep instrument away from direct sunlight and hightemperatures such as in a car, or near a stove or heatsource.
● After use, remove dust and cutting chips, and apply
rust preventative oil to Extension Rods and Washer.
When not in use store in supplied storage case.
● This product is for measuring inside diameter; use
only as directed. Improper use may cause accident orinjury.

② Select the Extension Rod or Washer (WCDI-18 only) for thedimension you want to measure.
Ex.）WCDI-10

Set to measure 8.5mm

1. Loosen the Nut at the bottomof Measurement Head
2. Install the Extension Rod andsecure.

Ex. Rod８.５ｍｍ

NutSpannerInsert
ClampScrewEx.）WCDI-18 Set to measure 14.5mm

Spanner

Using Spanner, attach the Extension
Rod and Washer to the Measurement
HeadWasher
Ex. Rod
１４ｍｍ ＋ ０.５ｍｍ

■ OPERATION※Before use, please make sure the Measurement Head is
not loose on the Handle. Tighten as necessary.
SETTING THE 0-POINT�① Prepare a Ring Gauge to use as a reference standard
for setting the zero-point. Insert the Measurement Head
into the ring gauge.

② In the direction perpendicular to the Ring Gauge axis,

position the Bore Gauge to measure diameter ⓐ shown inthe cross section (Figure 1). This is the maximum
distance, and the Dial Gauge will show the minimum
reading. The Guide moves to automatically position theGauge Head at this diameter when inserted.

（Figure１）※WCDI-10 does not have a guide on theMeasurement Head, so please position at minimum
value manually.
③ In the cross section shown in Figure 2, parallel the Ring

Gauge axis though diameter ⓐ, position the Bore Gauge
to minimize the distance ⓑ. In this position the Dial Gauge
will read the maximum value.
This position is determined by manually moving the gaugeand noting the position where the Pointer shows themaximum value. (Figure 3)ⓑ（Figure２）（Figure３）④ The reading obtained at step ③ is the zero-point. Rotate
the bezel of the gauge until the Pointer is at the zero pointof the Gauge Face. (Figure 4)

Bezel

Set to Zero

MEASUREMENT
RotateInsert the Measurement Head of the Bore Gauge into theobject to be measured. As in step ③ of “Setting the 0Point” above, pivot the gauge while checking the pointerto determine the diameter ⓑ where the indicator willshow the maximum value to determine the measurement
reading.
This measurement will be the difference in diameter
between the part, and the reference Ring Gauge.

（Figure４）■ REPAIRS AND SERVICE● If Gauge does not operate properly, or if you have any questions, please contact distributor or place of purchase.
● Please note, manufacturer is unable to respond to inquires or provide service directly. Please contact distributor orplace of purchase.

Niigata Seiki Co., Ltd.
6­15­22, Tsukanome, Sanjo, Niigata, Japan 955­0055

TEL: +81­256­31­5670 FAX: +81­256­39­7730

MAIL: intl.sales@niigataseiki.co.jp

URL http://www.niigataseiki.co.jp

I386­K

1810