3 Point Bore Gaging System
For the accurate and precise
measurement of internal diameters.
MEASURING RANGE: .236"/6mm to 7.87"/200mm
Premium Quality • Made in England

Ergonomically designed pistol style handle allows
precise self-centered measurements to be performed

Shown Above: True-Bore Lever Style Handles in use with True-Bore
gage heads and a variety of indicator options |
True-Bore is the result of
over 25 years of design and manufacture of 3-point bore
gaging systems. Ideal for solving internal diameter measurement
problems on the shop floor and inspection areas, the system
is available in a large measuring range for specific applications.
Mechanical and electronic dial gages as well as linear
probes can be used as specified.
Main Features:
- True-Bore heads have a large measuring range and
are supplied with fixed anvils eliminating operator
error. 24 heads cover .236"-7.87" (6-200mm
range).
- Unique System design allows two measuring handles
or pisto lgrip Triga-Bore™ to cover .236"-7.87"
(6-200mm range).
- Extensions available for increased gaging depths.
- Accuracy: See chart below.
- Repeatability: .0001"/0,002mm.
- High degree of accuracy can be achieved without
need for special skills.
- Customer can specify type of output.
- Ideally suited to simple or integrated measurement
applications.
- Can be used for special applications such as threads
'o' ring grooves, spherical forms, etc.
- Ergonomically designed handle offers single handed
operation.
- Accurate calibration and linearity checks can also
be made using Flexbar's True-Cal System (Available
upon request).
|

Pistol Grip Style Handle for Flexbar 3 Point Bore Gage Systems
 |
Triga-Bore™
Handle shown with True-BoreHead, Digital Indicator,
and Master Setting Ring |
Above: 3-Point Bore
Gage Head dimensions - see below |
Flexbar Lever Style
Bore Gage Handles can be used with the entire
range of True-Bore 3-Point Bore Gage Heads. Ideal
for use in vertical gaging applications and tight
access situations. |
*TRIGA-BORE
ACCEPTS INDICATOR WITH 3/8” DIAMETER OR 8MM
DIAMETER (WITH BUSHING INCLUDED) OPERATES WITH
INDICATORS HAVING 1” TRAVEL (IF LESS THAN 1”
TRAVEL SEE BELOW
Specifications for Ordering Handles, Gage Heads and Setting Rings
I. TRIGA-BORE™ PISTOL GRIP AND LEVER STYLE BORE GAGE HANDLES*
Model No. 20308,
Pistol Grip Style Handle accepts heads: .236"/6mm
- .630"/16mm
Model No. 20309,
Pistol Grip Style Handle accepts heads: .630"/16mm
- 7.874"/200mm
Model No. 20310,
Lever Style Handle accepts heads: .236”/6mm -
.630”/16mm
Model No. 20311,
Lever Style Handle accepts heads: .630”/16mm -
7.874”/200mm
II. 3-POINT BORE GAGE HEADS
AND MASTER SETTING RING**
Model
No. |
Head
Size |
Contact
Line A |
Length
B |
Head
Accuracy |
Master
Setting Ring***
Bilateral Class Z Steel |
MM |
IN |
IN |
IN |
IN |
Model
No. |
Size
Inch |
|
6-8
8-10
10-13
13-16
16-20
20-26
26-32
32-40
40-50
50-60
60-70
70-80
80-90
90-100
100-110
110-120
120-130
130-140
140-150
150-160
160-170
170-180
180-190
190-200 |
.236-.315
.315-.394
.394-.511
.511-.630
.630-.787
.787-1.023
1.023-1.260
1.260-1.575
1.575-1.968
1.968-2.362
2.362-2.756
2.756-3.150
3.150-3.543
3.543-3.937
3.937-4.330
4.330-4.724
4.724-5.118
5.118-5.512
5.512-5.906
5.906-6.299
6.299-6.693
6.693-7.087
7.087-7.480
7.480-7.874 |
.109
.118
.157
.157
.280
.390
.390
.433
.591
.591
.591
.591
.591
.591
.767
.767
.767
.767
.767
.767
.866
.866
.866
.866 |
2.36
2.36
2.36
2.36
2.36
2.36
2.36
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75
2.75 |
.0001
.0001
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.00015
.0002
.0002
.0002
.0002 |
|
.2912
.3437
.4375
.5625
.7187
.9062
1.0312
1.4062
1.7500
2.1875
2.5625
2.9375
3.3437
3.7500
4.1250
4.5625
4.9062
5.3125
5.7187
6.1093
6.5000
6.9062
7.2912
7.6875 |
III. EXTENSIONS (for longer
depths)
Model No. |
For Use with
Gage Head Nos. |
Length
(mm) |
Length
(inch) |
|
20312-20313
20314-20315
20316
20317
20318-20335 |
100
100
100
150
150 |
3.937
3.937
3.937
5.905
5.905 |
Extensions may be combined
for longer gaging depths.
IV.
ELECTRONIC DIGITAL INDICATORS (with Absolute/Preset
measuring mode)
Available Gages Include: Model
No. 18318,
Flexbar-Preisser Digi-Met Plus
V.
GAGE STEM EXTENSIONS (For indicators with
less than 1” travel Model No. 17262,
1/2” length for 1/2” Indicator Travel (4-48
thread)
VI. Triga-Bore Stand,
supports Triga-Bore handle/head when not
in use. Model No. 20336
The Flexbar Triga-Bore™ System Sets
Sets available covering
a measuring range:
.236”/6mm to 3.9327”/100mm
- Easy to Use
- Interchangeable/Economical Heads
- Self Centering Operation
- Ordering as easy as 1,2,3 (see below)
Now Available in Complete
Sets...
with or without indicator*
Sets include:
- Appropriate range of True-Bore 3-Point Bore
Gage Heads – Self Centering with Fixed Anvils.
- Triga-Bore Pistol Grip Handle – accepts indicators
with 3/8” dia. stem or 8mm dia. (with included bushing).
- Appropriate setting rings with Certificate
of Calibration
- to N.I.S.T.
- Special stand for holding Pistol Grip.
- Fitted hard plastic carrying case.
|
*Standard DIGI-MET®
Electronic Indicator No. 18318 Features:
- Resolution: .00005”/0.001mm
- Preset Capability
- Accuracy: .00015”/0.002mm
- Preset Recall
- True inch/metric conversion
- Bidirectional RS232 Output
- Min/Max/TIR Modes
- Tolerance Signal Lights
**Optional DIGI-MET ®
Multi-Mode Indicator No. 18515 also includes:
ABOVE
INDICATORS INCLUDE FREE CERTIFICATE OF CALIBRATION
TRACEABLE TO N.I.S.T
|
COMPLETE
TRIGA-BORE/TRUE-BORE SETS INCLUDE: |
Measuring
Range |
Contents
of Set |
Set
Without Indicator |
Sets
w/Standard DIGI-MET Indicator |
Inch |
Metric |
|
Model
No. |
Model
No. |
.236-.630”
.630-1.575”
1.575-2.362”
2.362-3.150”
3.150-3.937” |
6-16mm
16-40mm
40-60mm
60-80mm
80-100mm |
Triga-Bore Pistol
Grip, 4 Heads, 2 Rings
Triga-Bore Pistol Grip, 4 Heads, 2 Rings
Triga-Bore Pistol Grip, 2 Heads, 1 Ring
Triga-Bore Pistol Grip, 2 Heads, 1 Ring
Triga-Bore Pistol Grip, 2 Heads, 1 Ring |
|
|
Model No. |
For Use with
Gage |
Head Sizes |
Extension Length
|
|
|
.236-.394”
.394-.630”
.630-.787”
.787-1.575”
1.575-7.874” |
6-10mm
10-16mm
16-20mm
20-40mm
40-200mm |
3.937"
3.937"
3.937"
5.905"
5.905" |
LARGER DIAMETER BORE
GAGE SETS up to 7.87”/200mm also available. Phone
or Fax for pricing.
|