Holtests - Carbide and Two-Point
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| Calibration Services |
These Holtests are versatile, three-point internal micrometers for the accurate and efficient direct-measurement of internal diameters.
Three anvils, evenly spaced at 120° apart, contact the internal wall surfaces and find true alignment with the axis of the bore for accurate ID measurement.
Features:
•Measurement can be taken nearly up to the bottom of the bore
•Highly durable because of carbide tipped contact points
•Can measure deep holes using an extension rod which is available on models over 6mm measuring range
•Ratchet stop for constant measuring force
Extension Rods (optional) |
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Application Range |
Application Range Metric |
Order Number |
Length |
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0.275-0.5" |
6-12mm |
952322 |
3.94" (100mm) |
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0.5-0.8" |
12-20mm |
952621 |
5.9" (150mm) |
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0.8-1.2" |
20-30mm |
952622 |
5.9" (150mm) |
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1.2-4.4" |
30-110mm |
952623 |
5.9" (150mm) |
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Range |
Accuracy |
Range |
Measuring Force (per Anvil) |
0.275-0.8" 6-20mm |
0.00008" 0.002mm |
0.275-0.5" 6-12mm |
4-20N |
0.8-4" 20-100mm |
0.00012" 0.003mm |
0.5-4" 12-100mm |
15-45N |
4-12" 100-300mm |
0.0002" 0.005mm |
4-12" 100-300mm |
30-75N |
To read IDs to 0.0001" directly, the probe movement is designed to assure consistent accuracy over the entire range. The probe movement fixes one side of the probe and allows the other half of the probe to move parallel to the stationary side. With this new design and the leaf-spring mechanism, these Holtests are, by far, the most direct and accurate instruments to check small hole diameters.
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Accuracy: Measuring Force (per Anvil) 4-20N |
Inch |
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Set Order Number |
Range |
Individual Order Number |
Graduation |
L1 |
L2 |
Accessories Included in Set |
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0.080-0.100" |
268-021 |
0.0001" |
0.47" |
4" |
177-209 Setting Ring 0.100" DIA. 202863 Hex Wrench |
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0.100-0.120" |
368-022 |
0.0001" |
0.47" |
4" |
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0.120-0.160" |
368-023 |
0.0001" |
0.86" |
4.5" |
177-203 Setting Ring 0.160" DIA. 177-207 Setting Ring 0.240" DIA. 202863 Hex Wrench |
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0.160-0.200" |
368-024 |
0.0001" |
0.86" |
4.5" |
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0.200-0.240" |
368-025 |
0.0001" |
0.86" |
4.5" |
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0.240-0.280" |
368-026 |
0.0001" |
0.86" |
4.5" |
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Metric |
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Set Order Number |
Range |
Individual Order Number |
Graduation |
L1 |
L2 |
Accessories Included in Set |
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2-2.5mm |
368-001 |
0.001mm |
12mm |
104mm |
177-208 Setting Ring 2.5mm DIA. 202863 Hex Wrench |
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2.5-3mm |
368-002 |
0.001mm |
12mm |
104mm |
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3-4mm |
368-003 |
0.001mm |
22mm |
114mm |
177-204 Setting Ring 4mm DIA. 177-205 Setting Ring 5mm DIA. 202863 Hex Wrench |
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4-5mm |
368-004 |
0.001mm |
22mm |
114mm |
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5-6mm |
368-005 |
0.001mm |
22mm |
114mm |
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