Groove Gauging

Groove Gauging


XT Grooves - The Best Way to Measure Internal Groove Diameters


As the world’s leading bore gauge manufacturer, we offer a range of both standard and bespoke solutions for precision groove diameter measurement.


Individual Groove Gauging Heads


• Available from 6-300mm diameter​ 
• 2 Point (ovality) or 3 Point available​ 
• Interchangeable with standard heads​ 
• XTD, XTH, & Ultima​ available 
• Suitable for special forms, Radius, Ball Race, Brake Caliper, Blind Bore, Annular​ 
• Depth stops & guide sleeves available for quick, accurate location


Each of these application heads can be fitted directly to our XT range of internal micrometers in seconds for fast, efficient use with incredibly accurate results.


Standard XT Holematic Groove Sets 


Now available as stocked items, features of the standard XT groove sets include:


• Generic anvil profile suits common groove sizes – see table below 
• Sets available to cover diameters 6 – 100mm (1/4” – 4”) 
• 3-point, self-centring, interchangeable heads for repeatability 
• 0.001mm 0.00005” resolution 
• Depth stops included 
• Extensions available 
• IP67 sealed 
• Setting rings with UKAS certificates included 
• Bluetooth with free data collection App


Download PDF

Custom Groove Gauging


If our generic groove anvil profile is not suitable for your application, please complete the Custom Groove Gauge Enquiry Form below and our team will design a bespoke head, perfectly tailored to fit your specific application.


Our custom application heads can be fitted directly onto our XT range of internal micrometers to create a flexible, modular measuring system. 


Lead Times


• Basic groove gauge lead-time = 1-2 weeks 
• Custom groove gauge (blind bore, extreme travel, etc.) lead time = 2-4 weeks

Custom Groove Gauge Enquiry

Code NoSet RangeIncluded HeadsAnvil Step HeightAnvil Contact WidthDepth Stop ODSetting Ring Sizes
SP-SXTH10M-BT-GRO 6-20mm 6-8mm
8-10mm
10-12.5mm
12.5-16mm
16-20mm
1.25mm
1.25mm
1.5mm
2.0mm
2.5mm
1.5mm
1.5mm
1.5mm
1.5mm
1.5mm
18mm
20mm
22mm
26mm
33mm
8mm

12.5mm

20mm
SP-SXTH10I-BT-GRO 1/4"- 3/4” 1/4" - 5/16"
5/16" - 3/8"
3/8" - 1/2"
- 1/2" - 5/8"
5/8" - 3/4”
0.049"
0.049"
0.059"
0.079"
0.098”
0.059”
0.059”
0.059”
0.059”
0.059”
0.709"
0.787"
0.866"
1.024"
1.299”
5/16”

1/2"

3/4"
SP-SXTH5M-BT-GRO 20-50mm 20-25mm
25-35mm
35-50mm
3.175mm
5.5mm
4mm
2mm
2mm
2mm
39mm
45mm
60mm
20mm
35mm
SP-SXTH5I-BT-GRO 3/4"- 2” 3/4" - 1"
1" - 1 3/8"
1 3/8" - 2"
0.108"
0.217"
0.157"
0.079"
0.079"
0.079"
1.535"
1.772"
2.362"
3/4"
1 3/8"
SP-SXTH6M-BT-GRO 50-100mm 50-65mm
65-80mm
80-100mm
8mm
8mm
10.5mm
3mm
3mm
3mm
8-mm
95mm
115mm
65mm
80mm
SP-SXTH6I-BT-GRO 2"- 4" 2" - 2 5/8”
2 5/8" - 3 1/4"
3 1/4" - 4"
0.315"
0.315"
0.315"
0.11”8
0.11”8
0.11”8
3.150"
3.740"
4.528"
2 5/8"
3 1/4"

CodeTitlePrice
SBM-Caliper Special Bore Measurements Caliper POA
SBM-Ball Special Bore Measurements Ball Race POA