INSTRUCTION MANUALDIAL BORE GAUGE

Model No. : CDI-50 / CDI-100 / CDI-160 <combined>

Thank you for purchasing the DIAL Bore Gauge.
Please read this manual thoroughly before use for proper operation.

■PART IDENTIFICATION■SPECIFICATIONSRevolution Counter
Dial Indicator

(1mm)

Bezel
Pointer(0.01mm)Indicator
Face
Clamp Screw

SpacerProtective Cover＊：Including supplied Dial Indicator.

Model No.
(mm)
Measuring Range(mm)
Graduation＊ Wide Range Accuracy
(μm)
＊(μm)
Adjacent Error＊ Repeat Accuracy(μm)
Single Probe Measuring Range (mm)Extension Washer(kg)Weight

CDI-100
CDI-160
50〜16050〜1000.01
1818156653
1.6
1.6
1.20.5, 1, 2, 3 mm (One each)
1.1
1.15
1.05

CDI-5035〜50

Extension Rods:
Grip

CDI-50･････35, 40, 45, 50mm (4 pieces)
0.5mm 1mm 2mm 3mm

Extension Washer

Shaft

Rod Mounting
Nut

Length below grip - 150mm

Extension Rod■NOTICE● This is a precision instrument, use care not to drop or mishandle.
● Please do not disassemble or modify.

55mm Sub Rod(CDI-160 only)● Keep instrument away from water and oil.
● Use only with provided Extension Rod, Washers, and Sub Rod.
● Keep instrument away from direct sunlight or high temperatures

such as in a car, or near a stove or heat source.
● After use, remove dust and cutting chips, and apply rust

Extension RodProbe Tip
Measurement Head

CDI-100･･･50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100mm (11 pieces)
CDI-160･･･50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105mm (12 pieces)＋Sub Rod 55mm (1 piece)

preventative oil to Extension Rod and Washers. When not in use
store in original storage case.
● This product is for measuring inside diameter. Use only asdirected. Improper use may cause accident or injury.

Guide■ASSEMBLY①Remove the protective cover by unscrewing the twoscrews that hold the cover in place.

※To reattach the protective cover, please refer to the section:“Attaching the Protective Cover”②Loosen the Clamp Screw and insert the Dial
Indicator until the Pointer rotates 1/10 turn or more.
Secure by tightening the Clamp Screw.
1/10 rotation
or more③Chose combination of Rod, Washer, and Sub Rod (CDI-160D only)
applicable for desired measurement range.
Remove the Rod Mounting Nut and install the selected Rod,Washers and Sub Rod, then replace Mounting Nut to secure to body.
※When selecting washers, use combination with fewest washers.

Example: For 60mm Measurement

Rod Mounting Nut

Extension Rod
60mm

InsertExample: For 62.5mm Measurement

Clamp
Screw

Extension Extension
Extension
Rod＋ Washer ＋ Washer
60mm
0.5mm
2mm

Example: For 118mm Measurement

Extension Extension
Rod ＋ Washer
60mm
3mm

Rod＋ Sub
55mm

■OPERATION※Before use, please make sure the Measurement Head issecure. Tighten as necessary.

ⓑⓐZERO POINT ADJUSTMENT①Prepare a ring gauge to use as a reference standard forsetting the zero-point. Insert the Measurement Head
into the ring gauge.
②In cross section perpendicular to the axis of the ringgauge, position the gauge along diameter ⓐ (Figure: 1).
This is the maximum distance, and at this point the Dial
Indicator will read the minimum value. The Gauge Headwill automatically sit in this position when inserted.
③In cross section parallel to the axis of the ring gaugethrough diameter ⓐ, position the indicator to minimize
the distance ⓑ (Figure: 2). In this position the Dial
Indicator will read the maximum value. This position
must be manually achieved by moving the indicator andnoting the position where the Pointer shows themaximum value. (Figure: 3)(Figure: 1)(Figure: 2)(Figure: 3)④The reading obtained at step ③ is the zero-point.
Rotate the bezel of the gauge until the Pointer is at thezero point of the Indicator Face. (Figure: 4)

Bezel

MEASUREMENT

Set to Zero

RotateInsert the Measurement Head of the Bore Gauge into theobject to be measured. As in step ③ of “Zero-Point
Adjustment” above, pivot the gauge while checking thepointer to determine the diameter ⓑ where the indicator
will show the maximum value to determine themeasurement reading.

(Figure: 4)■ATTACHING THE PROTECTIVE COVER
To use the Protective Cover, please attach using the following procedure.
①Loosen the Clamp Screw and remove Clamp and Spacer from shaft. (Figure: 5)

Screws②Follow the “Assembly” procedure to mount the Indicator and secure with the Clamp.
③Mount the Protective Cover to the Indicator and attach with the 2 mounting screws.
(Figure: 6)

InstallRemoveSpacerRemove

Clamp ScrewIndicator(Figure: 5)(Figure: 6)■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 or place of purchase.

Protective
Cover

Niigata seiki Co., Ltd.
6-15-22, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-31-5660 Fax. : +81-256-39-7730

MAIL:intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp
I250-K 1508