Holtests - Carbide and Two-Point


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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)

Application Range
Inch

Application Range
Metric
Order Number
Length
0.275-0.5"
6-12mm
952322
3.94" (100mm)
0.5-0.8"
12-20mm
952621
5.9" (150mm)
0.8-1.2"
20-30mm
952622
5.9" (150mm)
1.2-4.4"
30-110mm
952623
5.9" (150mm)

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

 

Two-Point Holtests

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.

 

Accuracy:
0.00008"
0.002mm

Measuring Force (per Anvil)
4-20N

 

Inch
Set Order Number
Range
Individual Order Number
Graduation
L1
L2
Accessories Included in Set
PN: 368-926
Price: $2,871.00
0.080-0.100"
268-021
0.0001"
0.47"
4"
177-209 Setting Ring 0.100" DIA.
202863 Hex Wrench
0.100-0.120"
368-022
0.0001"
0.47"
4"
PN: 368-927
Price: $4,581.00
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
0.160-0.200"
368-024
0.0001"
0.86"
4.5"
0.200-0.240"
368-025
0.0001"
0.86"
4.5"
0.240-0.280"
368-026
0.0001"
0.86"
4.5"
Metric
Set Order Number
Range
Individual Order Number
Graduation
L1
L2
Accessories Included in Set
PN: 368-906
Price: $2,871.00
2-2.5mm
368-001
0.001mm
12mm
104mm
177-208 Setting Ring 2.5mm DIA.
202863 Hex Wrench
2.5-3mm
368-002
0.001mm
12mm
104mm
PN: 368-907
Price: $3,510.00
3-4mm
368-003
0.001mm
22mm
114mm
177-204 Setting Ring 4mm DIA.
177-205 Setting Ring 5mm DIA.
202863 Hex Wrench
4-5mm
368-004
0.001mm
22mm
114mm
5-6mm
368-005
0.001mm
22mm
114mm

 



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