Datasheet

www.vishay.com
125
Model 21
Vishay Spectrol
Document Number: 57088
Revision 11-Sep-03
For technical questions, contact [e-mail]
FEATURES
• Round Vernier Scale
• 1-13/16” Dia.
• 1/4” or 1/8” Shaft Adapter
• Satin Chrome Finish with Black Markings
• Black Chrome Finish with White Markings
• Brushed Chrome Finish with Black Markings
46.02mm Dia 15 Turn Dial
DIMENSIONS in inches (millimeters)
MECHANICAL SPECIFICATIONS
PARAMETER
Mounting Direct to shaft with # 4 - 40
hex socket set screw located
adjacent to No.75 on
graduated dial.
Numeral Size:
Counter wheel: 0.90 H x 0.013 Inches W (2.29 x 0.33cm)
Graduated dial: 0.109 x 0.018 Inches (2.77 x 0.46cm)
Graduation Size:
Numeral and 0.55 Inches L (1.40cm)
every Fifth
Intermediate 0.035 Inches L (0.89cm)
Width 0.012 Inches (0.30cm)
Weight 3.0 maximum (85.05)
OPERATIONAL SPECIFICATIONS
Readout and Operation 1499 turns total
The number in window (0 thru 14)
indicates completed number of turns of the
drive sleeve. Graduated circular dial
indicates the percent of the partial
turn of the drive sleeve
Transfer Point The number in center of window shall
change as graduated dial rotates
between 94 and 0
Rotation Readout shall increase with clockwise
and decrease with counterclockwise rotation
Accuracy Zero backlash between graduated
dial and drive sleeve
ORDERING INFORMATION
21 1 11
MODEL SHAFT DIAMETER AND ACCOMMODATION FINISH AND OTHER FEATURES
1. 1/4” Shaft (standard) 11. Satin chrome, black markings
3. 1/8” Shaft adapter 21. Black chrome, white markings
Example: 21 - 1 - 11 31. Brushed chrome, black markings
0.562
(14.27)
0.094
(2.39)
0.125
(3.18)
± 0.001
0.250
Ø (6.35)
± 0.005
- 0.000
0.390
Ø (9.91)
DRIVE SLEEVE
MOUNTING FACE
TURNING KNOB
SET SCREW*
0.046
(1.17)
± 0.000
- 0.015
0.128
(3.25)
0.268
(6.81)
0.578
(14.68)
0.922
(23.42)
± 0.015
± 0.015
- 0.000
± 0.031
COUNTING DIAL
BRAKE LEVER
GRADUATED DIAL
BASE
1.812 ØP
(46.02)
1.094 R MAX
(27.79)
± 5°
46°
±
5°
22°
*SET SCREW LOCATION AT
NO 75 ON DIAL FACE
1.000
(25.40)
± 0.015
± 0.001
- 0.000