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Product Description
Brunson Instrument Company Model 841 Alignment Telescope – Precision Line Scope for Industrial Optical Tooling
This used Brunson 841 is a precision alignment telescope (also known as a “line scope”) designed for establishing and maintaining principal optical reference lines in industrial and power generation applications . Brunson has been a leader in precision optical alignment since 1927, serving industries including aerospace, power generation, shipbuilding, and heavy manufacturing .
Alignment telescopes are used to establish a perfectly straight line-of-sight reference, which can then be used for bore straightness evaluation, turbine diaphragm alignment, generator positioning, and machinery installation . The instrument can be used in collimation, autocollimation, and autoreflection modes depending on the application.
Design Heritage: Brunson alignment telescopes are based on the original Keuffel & Esser (K+E) design, which Brunson adopted as its primary product line after acquiring Cubic Precision in 1997 . The instruments are manufactured from heavy-walled, heat-treated special alloy stainless steel tubing, concentrically ground to extremely fine tolerances .
Condition Note: This unit is untested and sold as-is. No tripod, carrying case, optical micrometer, or light source are included unless specified.
Key Specifications (Based on Brunson Alignment Telescope Standards)
| Specification | Details |
|---|---|
| Manufacturer | Brunson Instrument Company |
| Model | 841 |
| Type | Alignment Telescope / Line Scope |
| Barrel Diameter | 2.2494″ – 2.2497″ (standard for 81/83 series) |
| Barrel Material | Heat-treated stainless steel alloy |
| Focusing Range | 2 inches to infinity |
| Optics | Coated for bright, clear image |
| Image Type | Erect (right-side up) |
| Collimation Tolerance | Line-of-sight parallel to barrel O.D.: ±1.0 arcsecond |
| Line-of-sight Straightness | ±0.001 inch or ±1.0 arcsecond (whichever is greater) |
| Auto Reflection Target Concentricity | ±0.001 inch |
| Auto Reflection Target Options | Three spacings (0.008″, 0.025″, 0.082″) up to 100′ |
| Light Source | LED lamp (typical for Brunson instruments) |
| Condition | Used – Untested |
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Heavy-wall Stainless Steel Barrel | Provides stability and accuracy even in harsh industrial environments |
| ±0.001 inch Accuracy | Suitable for precision turbine and machinery alignment |
| Wide Focusing Range | 2 inches to infinity accommodates diverse applications |
| Built-in Autoreflection Target | Enables autocollimation for alignment of optical components |
| Interchangeable Eyepieces | Can accept right-angle eyepieces for confined spaces |
| Proven K+E Design | Brunson’s alignment telescopes are based on the original Keuffel & Esser design, a proven standard in optical tooling |
Alignment Telescope Applications
Alignment telescopes are used across multiple industries for precision measurement and setup :
Power Generation :
-
Turbine diaphragm alignment (gas, steam, hydro)
-
Generator soleplate and bearing pedestal positioning
-
Bore straightness evaluation
-
Reactor vessel alignment
Industrial Manufacturing:
-
Paper mill roll alignment (parallelism over 1000+ feet)
-
Machine tool installation and calibration
-
Assembly line setup
Aerospace & Defense:
-
Aircraft wing curvature verification
-
Satellite assembly alignment
-
Navigational system alignment
Heavy Equipment:
-
Shipbuilding shafting alignment
-
Large pump and compressor installation
| Weight | 20 lbs |
|---|---|
| Dimensions | 18 × 10 × 8 in |
Related products
Sale!
Optical Equipment
Original price was: $2,100.00.$1,750.00Current price is: $1,750.00.
SKU: 37690
