Disc calculators, slide rules and other mathematical calculating instruments
Drawing, marking-out or mathematical calculating instruments (for example, drafting machines, pantographs, protractors, drawing sets, slide rules, disc calculators); instruments for measuring length, for use in the hand (for example, measuring rods and tapes, micrometers, calipers), not specified or included elsewhere in this chapter; parts and accessories thereof: > Other drawing, marking-out or mathematical calculating instruments: > Disc calculators, slide rules and other mathematical calculating instruments
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 9017.20.40.00
Hemmi 257 Bamboo Slide Rule
The Hemmi 257 is a 10-inch bamboo slide rule with Mannheim and trigonometric scales for advanced engineering calculations. It qualifies under HTS 9017.20.4000 as a traditional mathematical calculating instrument valued for precision and collectibility. Crafted from laminated bamboo with metal cursor for durability.
Circular Trig Disc Calculator
A pocket-sized rotating disc calculator for trigonometric functions, used in surveying and construction for angle and side calculations. Classified in HTS 9017.20.4000 as a disc-type mathematical instrument. Typically printed on heavy cardstock or plastic with locking mechanism.
Log Log Duplex Trig Slide Rule
Advanced slide rule with log-log scales on both sides for exponential and trigonometric calculations in nuclear physics and rocketry. Under HTS 9017.20.4000 as a high-end mathematical instrument. Magnesium or ivory construction with multiple cursors.
Perrygraf Pocket Slide Rule
Compact 5-inch slide rule for field engineers featuring A/B/CI/D scales for basic computations. HTS 9017.20.4000 classification for portable mathematical calculators. Aluminum construction with protective cover.
Interest Rate Disc Calculator
Circular calculator computing compound interest, loan amortization, and mortgage payments from principal, rate, and term inputs. HTS 9017.20.4000 for financial mathematical disc instruments. Heavy stock paper or vinyl construction.
Scale Model Aircraft Weight & Balance Calculator
Slide rule-style calculator for RC hobbyists computing center of gravity and weight distribution for model aircraft. Under HTS 9017.20.4000 as specialized mathematical instrument. Printed on durable plastic or metal.
Concrete Volume Disc Calculator
Contractor disc calculator for computing concrete volume, rebar quantities, and slab costs from dimensions. HTS 9017.20.4000 classification for construction mathematical instruments. Rugged laminated construction.
Electrical Wiring Disc Calculator
Disc for electricians calculating wire gauge, voltage drop, conduit fill, and circuit loads. Mathematical instrument under HTS 9017.20.4000. Color-coded heavy plastic construction.
Pacing Slide Rule for Surveyors
Specialized slide rule converting pace counts to distances for land surveyors without tape measures. HTS 9017.20.4000 as mathematical calculating instrument. Rugged field construction.
Beverage Cost Disc Calculator
Bar/restaurant disc computing drink costs, pour sizes, and pricing from liquor costs and markups. Under HTS 9017.20.4000 as commercial mathematical disc calculator. Laminated for kitchen durability.
Pickett N3 Slide Rule
The Pickett N3 is a classic duplex slide rule designed for engineering and scientific calculations, featuring logarithmic scales for multiplication, division, trigonometry, and logarithms. It falls under HTS 9017.20.4000 as a mathematical calculating instrument used for manual computations without electronic components. Primarily used by students and professionals before the advent of electronic calculators.
E6B Flight Computer Disc Calculator
The E6B is a circular slide rule disc calculator essential for pilots, performing wind correction, time/speed/distance, and fuel consumption calculations. Classified under HTS 9017.20.4000 as a disc calculator for mathematical computations in aviation. Made of durable plastic or metal with rotating discs and printed scales.
Keuffel & Esser Decilon Slide Rule
The K&E Decilon features decimal-aligned scales for high-precision scientific calculations, popular among physicists and surveyors. Falls under HTS 9017.20.4000 as a specialized mathematical calculating instrument. White celluloid on wood construction with smooth cursor mechanism.
Reloading Ballistics Disc Calculator
Disc calculator for firearm reloaders computing bullet trajectory, powder charge, and velocity based on ballistic coefficients. HTS 9017.20.4000 covers it as a specialized mathematical calculating instrument for recreational shooting math. Color-coded plastic discs with reference tables.
Diet and Calorie Disc Calculator
Rotating disc for calculating daily caloric needs based on age, weight, activity level, and diet goals. Falls under HTS 9017.20.4000 as a mathematical disc calculator for personal health computations. Laminated cardboard or plastic construction.