ATR Sales

What ATR Sales does

ATR Sales operates the ATRA-FLEX® flexible shaft coupling product line within U.S. Tsubaki Power Transmission, LLC, a privately held U.S. subsidiary of the Japanese conglomerate Tsubakimoto Chain Co. The company manufactures elastomeric-insert flexible shaft couplings — including the T-Series (T-FLEX®), M-Series (Millennium®), A-Series, and the OnyxShield™ nitrocarburized line — at U.S. production facilities. Core technology centers on a polyurethane insert that eliminates metal-to-metal contact, removes the need for lubrication, absorbs torsional shock and vibration, tolerates up to two degrees of misalignment, and operates across a -60°F to 250°F (standard) or 350°F (high-temp) range; M-Series units reach torque ratings up to 3.61 million in-lbs. Hubs and rings are machined from carbon steel or stainless steel grades 303, 304, and 316, with OnyxShield positioned as a proprietary cost-effective corrosion-resistant alternative to stainless.

The business model is B2B industrial component sales: one-time product purchases of couplings plus ongoing replacement-insert revenue, with pricing on a custom quote basis tied to torque and sizing. Go-to-market is channel-led, combining a global industrial distributor network, regional manufacturer sales representatives, and direct factory engagement for custom designs — supported digitally by U.S. Tsubaki's website, configurators, technical resource libraries, and a "Request a Quote / Ask an Expert" function. End markets span heavy industrial manufacturing (aggregate, cement, steel, primary metals), food and beverage processing, oil/gas/mining, pulp and paper, and power generation/utilities, with the company stating global industry reach. No public revenue, headcount, or ownership-percentage data is disclosed; the entity is part of a broader Tsubaki group that also includes KCI Inc., Central Conveyor, and Mayfran International.

Name

ATR Sales

Legal name

U.S. TSUBAKI POWER TRANSMISSION, LLC

Website

https://atra-flex.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

ATR Sales markets the ATRA-FLEX® line of USA-made elastomeric flexible shaft couplings for U.S. Tsubaki Power Transmission, serving heavy industrial, food and beverage, oil and gas, mining, and power generation customers via industrial distributors and manufacturer representatives.

Ownership category

akta.pro rank

Product category

Industrial Power Transmission Couplings

NAICS

Mechanical Power Transmission Equipment Manufacturing (333613)

akta.pro primary industry

Linear Motion & Mechanical Power Transmission (Ball/roller screws, linear guides, bearings, couplings) (IMAHAGAM)

Keywords

• Flexible shaft couplings
• Power transmission components
• Industrial couplings
• Elastomeric couplings
• Misalignment couplings

Headquarters

HQ city

Santa Ana

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D

Revenue model

1. ATRA-FLEX Flexible Couplings Sales: B2B industrial power transmission components sold through manufacturer representatives and industrial distributors. Products include flexible shaft couplings (T-Series, M-Series, A-Series), inserts, and accessories. Revenue is generated through one-time product sales with ongoing replacement insert revenue.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

ATR Sales distributes the ATRA-FLEX line of elastomeric flexible shaft couplings for industrial power transmission applications. The product range includes T-Series (T-FLEX), M-Series (Millennium), A-Series couplings, OnyxShield nitrocarburized corrosion-resistant variants, and replacement polyurethane inserts, all manufactured in the USA from carbon steel or stainless steel (grades 303, 304, 316). The couplings are designed to transmit torque without metal-to-metal contact, require no lubrication, accept up to 2 degrees of misalignment, and dampen torsional vibration and shock loads.

Product overview

ATRA-FLEX® is a comprehensive line of flexible shaft couplings designed for the power transmission industry. The product family includes four distinct coupling series—T-Series (T-FLEX®), M-Series (Millennium®), A-Series, and OnyxShield™ nitrocarburized variants—plus replacement inserts. All couplings feature elastomeric polyurethane inserts that operate without metal-to-metal contact, requiring no lubrication. The series progress from general-purpose T-Series (up to 1,570,000 in-lbs torque) to high-capacity M-Series (up to 3,610,000 in-lbs) to compact A-Series (up to 570,000 lb-in), with OnyxShield providing corrosion-resistant surface treatment across the full product line as an alternative to stainless steel. All products are USA-manufactured from carbon steel or stainless steel grades 303, 304, and 316.

Differentiator

Problem solved

Functional benefit

Brands

• ATRA-FLEX®: ATRA-FLEX® Flexible Couplings - elastomeric flexible shaft couplings manufactured for the Power Transmission Industry, featuring T-Series, M-Series, A-Series, and OnyxShield nitrocarburized couplings.

Products and services

• ATRA-FLEX® Flexible Couplings Industry-leading flexible shaft couplings with elastomeric polyurethane inserts designed for industrial power transmission applications. Operate without metal-to-metal contact, require no lubrication, accept misalignment up to 2 degrees, and feature standard insert temperature range from -60°F to 250°F with high-temperature inserts available up to 350°F. Manufactured in the USA from carbon steel or stainless steel (grades 303, 304, 316). Targeted at heavy industrial OEMs, food and beverage processors, oil and gas, mining, pulp and paper, and power generation customers.
• T-Series (T-FLEX®) Flexible Coupling Flexible coupling manufactured in the USA with hubs and rings machined from solid carbon steel rounds and tubing for tight tolerances and excellent balance. Features torque ratings up to 1,570,000 in-lbs. Available in stainless steels (303, 304, 316) for corrosive environments and food applications. Targeted at general industrial power transmission applications.
• M-Series (Millennium®) Flexible Coupling High-capacity flexible coupling featuring a detect and lock-on ring design with internal insert support for higher horsepower in a smaller package. Offers large bore capacity, no exposed shaft on spacer coupling, and torque ratings up to 3,610,000 in-lbs. Manufactured in the USA with carbon steel or stainless steel options. Targeted at heavy industrial applications requiring maximum torque capacity.
• A-Series Flexible Coupling Compact flexible coupling with torque ratings up to 570,000 lb-in featuring easy replace-in-place inserts, low reaction forces, and shear protection. No lubrication required. Manufactured in the USA with stainless steel options for corrosive environments and food applications. Targeted at applications requiring a smaller footprint.
• OnyxShield™ Nitrocarburized Couplings Corrosion-resistant nitrocarburized coupling treatment available across the complete ATRA-FLEX coupling product line. Provides corrosion and water resistance to chemicals and harsh environments, increased surface hardness, lower coefficient of friction, enhanced surface lubricity, and increased rotating fatigue strength. Cost-effective alternative to stainless steel. Targeted at harsh-environment industrial applications including oil and gas, mining, chemical processing, and dredging.
• ATRA-FLEX® Replacement Inserts Polyurethane replacement inserts for all ATRA-FLEX coupling series. Available in a range of hardness levels to meet torsional stiffness and torque requirements. Offer very high resistance to chemicals and weather. Easy to replace without removing hubs or disassembling driving/driven equipment. Targeted at existing ATRA-FLEX coupling users for maintenance and replacement.

Quantifiable outcome

• No lubrication required - eliminates ongoing lubrication maintenance
• +5 more outcomes

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves1 record

Expansion highlights4 records

Direct peers

• TB Wood's: TB Wood's is a historical manufacturer of flexible couplings (including Sure-Flex elastomeric designs) and competes directly with ATRA-FLEX in industrial power transmission couplings.
• Lovejoy (Curtiss-Wright): Lovejoy is a long-established manufacturer of flexible jaw and disc couplings, directly competing with ATRA-FLEX in elastomeric and mechanical flexible couplings for industrial power transmission.
• R+W Coupling Technology: R+W specializes in precision flexible and servo couplings, overlapping with ATRA-FLEX in elastomeric and mechanical power transmission couplings for industrial and automation applications.
• KTR Systems: KTR is a leading European manufacturer of flexible couplings (including ROTEX elastomeric spider couplings) that directly competes with ATRA-FLEX in the same product category and similar industrial customer base.

Broad incumbents

• Regal Rexnord: Regal Rexnord is a large diversified power transmission manufacturer whose couplings portfolio (formerly including Falk and other brands) overlaps with ATRA-FLEX across multiple industrial verticals.
• SKF: SKF is a global bearings and rotating-equipment manufacturer that also offers couplings and power transmission solutions, making it a broad incumbent competitor in industrial customer accounts.
• Siemens (Flender / Motion Control): Siemens, through its Flender and motion control businesses, supplies couplings and complete drive systems to industrial customers, providing a broader incumbent alternative to ATRA-FLEX in heavy industrial applications.
• Boston Gear: Boston Gear offers a broad catalog of power transmission components including couplings, gear drives, and bearings, overlapping with ATRA-FLEX in industrial distribution channels.
• Rexnord: Rexnord manufactures industrial power transmission components including couplings and gears, providing a broader competing product portfolio that overlaps with ATRA-FLEX in heavy industrial applications.

Emerging players

• Mayr Power Transmission: Mayr specializes in safety clutches, brakes, and torque-limiting devices, and overlaps with ATRA-FLEX in select industrial applications where overload protection and shaft coupling intersect.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/US_Tsubaki
• YouTubeyoutube.com/channel/UCicPsa_B7RrRzo3Vz635tjQ
• Facebookfacebook.com/AtraFlexCouplings
• LinkedInlinkedin.com/company/atr-sales

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ATR Sales