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With Brunson transits, you can perform the most exacting alignment projects
with minimal set-up and measurement time. These instruments are
uniquely capable of being calibrated and adjusted on-site, giving you the
power to confirm the instrument’s optical and mechanical relationships
which are crucial for accurate alignments.
Our transits provide great flexibility and operate in extreme environments.
From critical alignments performed in clean rooms on space shuttle and
satellite components to the heavy manufacturing demands of steel mill and
power plant alignments, Brunson transits give you an efficient and
convenient system to perform countless industrial metrology tasks.
These instruments provide you with:
- Precision measurement (± 0.001") capability and reliability
- Tremendous flexibility in various applications and environments
- Quick setup and measurement time
- Easy operation
- Survey and build modes
- Rugged construction
- On-site calibration capability
For a more in-depth look at optical tooling instruments, principles, and
applications, visit our Learning Center.
The following features apply to our transits. All are designed for
easy operation and years of trouble-free service. They include:
Telescope
The telescope’s adjustments will maintain a straight line of sight
throughout a focusing range of 2" to infinity, allowing the instrument
to be located in the tightest of setups. This straightness is maintained at
± 0.001" from 2" to 17 feet and one arcsecond from 17 feet to
infinity.
The main telescope tube has a removable section at the eyepiece end to
facilitate conversion to autocollimation and/or autoprojection capabilities,
or the installation of a right angle eyepiece. The objective end of the
telescope barrel is machined so you can mount an optical micrometer or
auto-reflection target. Both ends of the telescope will plunge through
the standards, even with the optical micrometer attached.
Standards
For extra rigidity and strength without extra weight, Brunson standards are
made of an aluminum alloy in a one piece, truss-type design. The standards
are designed so you can adjust the perpendicularity of the horizontal to
vertical axis.
Base
The instrument's vertical spindle is a patented, dustproof ball bearing
design having a runout of 0.000025" or less, and is hollow to allow
vertical shots. There are four dust-shielded leveling screws with 1½"
knurled heads and a 3/8" x 32 thread, in acetal plastic bushings.
The base mounting plate is made of cast bronze with a standard 3½" x 8
internal thread. Adjustment is provided in the base assembly for
centering the optical axis of the telescope concentric to the vertical axis
of the instrument.
Leveling Vials
A bull’s eye bubble having 15 arc minute sensitivity is provided for rough
leveling. Precision leveling is accomplished using the telescope's
turret-type split-bubble level vial, our 194-TM, which has the capability to detect one
arcsecond angular deviation.
Tangent Screws
All Brunson tangent screws are equipped with a wobble pin to eliminate
strain when pointing the instrument. The clamp mechanisms are
spring-loaded against the tangent screws. Clamping screws allow the
standards and telescope either to spin freely or be controlled by the
tangent screws.
Height
The instrument is 13½" as measured from the bottom of the base to
center of the horizontal axis.
Finish
The instruments are painted with a high quality gray metallic polyurethane
coating.
Have a look at our available
transits!
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