Micrometers
Gear Tooth Micrometers SERIES 124 — Interchangeable Ball Anvil/Spindle Tip Type • Intended for making over-pin diameter measurements on gears using precision ball anvils/spindle tips (optional). • Equipped with Ratchet Stop for constant measuring force. • Interchangeable ball anvils/spindle tips for various gear modules (0.5 to 5.25) are optional.
Optional Accessories • Interchangeable ball anvil/spindle tip set Order No. Diameter* (mm) Gear module Dia. pitch 124-801 0.8 0.5 - 0.55 50 124-802 1.0 0.6 - 0.65 45 124-803 1.191 ( 3 / 64 in) 0.7 - 0.8 35 - 30 124-821 1.5 0.9 - 1 28 - 26 124-804 1.588 ( 1 / 16 in) 0.9 - 1 28 - 26 124-805 2.0 1.25 22 124-806 2.381 ( 3 / 32 in) 1.5 17 124-822 2.5 1.5 17 124-807 3.0 1.75 15 124-808 3.175 ( 1 / 8 in) — 14 124-823 3.5 2 13 124-809 3.969 ( 5 / 32 in) 2 13 124-810 4.0 2.25 11 124-824 4.5 2.5 10 124-811 4.763 ( 3 / 16 in) 2.5 10 124-812 5.0 2.75 9 124-813 5.556 ( 7 / 32 in) 3.0 - 3.25 8 124-814 6.0 3.5 7 124-815 6.35 ( 1 / 4 in) 3.75 7 124-816 7.0 4.0 6.5 124-817 7.144 ( 9 / 32 in) 4.25 6 124-818 7.938 ( 5 / 16 in) 4.5 5.5 124-819 8.0 4.75 5.5 124-820 8.731 ( 11 / 32 in) 5.0 - 5.25 5 Carbide-tipped for 2mm and smaller
B
124-173
d
66.5
62.9
18
25
2
68.5
SPECIFICATIONS Metric Order No.
ø3.5 (For attaching interchangeable tip)
Range (mm)
Graduation (mm)
Accuracy
124-173 124-174 124-175 124-176 124-177 124-178 124-179 124-180 124-181 124-182 124-183 124-195
0 - 25 25 - 50 50 - 75 75 - 100 100 - 125 125 - 150 150 - 175 175 - 200 200 - 225 225 - 250 250 - 275 275 - 300 d
±4μm
±5μm
66.5
18
62.9
0.01
25
2
68.5
±6μm
±7μm
ø3.5 (For attaching interchangeable tip)
DIMENSIONS
Unit: mm
Analog models up to 50 mm
18
d
15
66.9
25
2
68.5
Range (mm)
b d 32 64 45 89.5
ø3.5 (For attaching interchangeable tip)
0 - 25
25 - 50
Analog models over 50 mm up to 300 mm
18
d
15
66.9
（ 28 ）
（ 29 ）
（ 69.9 ）
Range (mm)
b d
25
2
68.5
50 - 75 75 - 100
65 115.1
（ 83.5 ）
（ 9 ）
79 140.1 100 - 125 93 165.1 125 - 150 105 190 150 - 175 118 214 175 - 200 131 240 200 - 225 144 265 225 - 250 156 290 250 - 275 169 314 275 - 300 187 352
ø3.5 (For attaching interchangeable tip)
( ): 124-195
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