ROTARY ADAPTORS
Rotary Adaptors
& Drill String Subs
Precision rotary adaptors for dependable drill string connections.
North Star Rotary Adaptors, also known as Drill String Adaptor Subs, are available in a wide range of diameters, lengths, wrenching configurations and thread sizes/types. Built around your required connection, dimensions and drilling setup.
Diameter, Length & Threads
Thread Compatibility
Specification Accuracy
Adaptor Sub Configurations
Designed Around Your Drill String
Top, Bottom & Crossover Sub Options
Upper & Lower Thread Connections
Wrenching Configurations
Certified Thread Gages & CNC Machining
MANUFACTURING & QUALITY CONTROL
Controlled Machining for Accurate Adaptor Specifications
North Star controls the machining and configuration details that define each rotary adaptor, from thread requirements and wrenching details to overall dimensions. The process is focused on specification accuracy and repeatable manufacturing.
OD, length, sub type and connection requirements confirmed.
Dimensions and connection features are machined to specification.
03 Thread Control
Upper and lower thread size/type are confirmed for the required connection.
04 Thread Gauging
Certified thread gages support accurate thread verification.
05 Dimensional Control
Outside diameter, length and wrenching details are checked against requirements.
Special requests and hard facing requirements are reviewed before production.
PRODUCT & CONFIGURATION
Adaptor Configuration at a Glance
Sub Type Top, bottom or crossover sub
Connections Upper and lower thread size/type
Wrenching Dimensions and location
Machining Latest CNC tooling and technology
SPECIFICATIONS & CONFIGURATIONS
Rotary Adaptor Sizes & Specifications
Key rotary adaptor specifications include outside diameter, shoulder-to-shoulder length, sub type, upper and lower thread size/type, wrenching details and any special requirements.
Key parameters
Outside Diameter · Length · Sub Type · Thread Size · Thread Type · Wrenching
North Star manufactures custom rotary adaptors to specified diameters, lengths, thread connections, wrenching and hard facing requirements. As a rotary adaptor manufacturer and supplier, we support quotation and wholesale enquiries.
APPLICATIONS
Built for Reliable Drill String Connections
Mining & Construction Drilling
Rotary adaptor and drill string adaptor sub configurations for mining and construction drilling where accurate dimensions and compatible thread connections are required. Search terms may include DTH rotary adaptor for mining and DTH rotary adaptor for drilling.
Drill Pipe & Drill String Connections
Adaptor subs connect drill rods and other drill string components when the required upper and lower thread connections need to be matched. This includes searches such as DTH rotary adaptor for drill pipe.
Custom Rotary Adaptor Configurations
Specify outside diameter, shoulder-to-shoulder length, sub type, thread connections, wrenching, hard facing and other special requirements.
CONFIGURATION GUIDE
Choose the Right Adaptor Sub Configuration
01 TOP SUB
Specify when the required adaptor configuration is a top sub.
Specify: Confirm OD, shoulder-to-shoulder length, upper and lower thread size/type, and wrenching details.
02 BOTTOM SUB
Specify when the required adaptor configuration is a bottom sub.
Specify: Confirm OD, shoulder-to-shoulder length, upper and lower thread size/type, and wrenching details.
03 CROSSOVER SUB
Specify when the adaptor is required as a crossover between different connections.
Specify: Confirm both thread connection sizes/types, overall dimensions and wrenching details.
How to Choose the Right Rotary Adaptor
Start with your drilling rig and existing drill string information. These details help us confirm the right rotary adaptor sizes, specifications and connection configuration.
1. Confirm the Drill Rig
Provide the drill rig make and model number.
2. Confirm Adaptor Dimensions
Confirm outside diameter and shoulder-to-shoulder length.
3. Check Thread Connections
Confirm upper and lower thread connection size and type, including API Reg, API IF or BECO where applicable.
4. Specify Wrenching & Special Requirements
Provide wrenching dimensions and location, hard facing requirements and any special requests.
SERVICE & SUPPORT
Support From Enquiry to Finished Adaptor
North Star provides configuration support and manufacturing control from enquiry through production, helping customers define the right rotary adaptor for their drill string.
DRILLING TOOL MANUFACTURING
400,000+
annual drill pipe production capacity across two facilities
25+
years of drill pipe manufacturing experience
Quality Guarantee
Custom Adaptor Configurations
Specify diameters, lengths, thread sizes/types, wrenching configurations, hard facing and other requirements for custom adaptor subs. North Star supports enquiries as a rotary adaptor supplier in China.
Configuration Support
Our multilingual team supports enquiries and helps confirm thread, dimension and configuration requirements for specific drilling applications.
Thread & Dimensional Control
Certified thread gages and the latest CNC tooling and technology support accurate thread and dimensional requirements.
Specification Accuracy
North Star uses controlled machining and inspection processes to verify product specifications before shipment.
FAQ
Rotary Adaptors: Common Questions
Clear answers about rotary adaptor sizes, specifications, thread connections, applications and selection.
What is a DTH rotary adaptor?
“DTH rotary adaptor” is a search term used for a drilling adaptor. In North Star’s Mining & Construction brochure, the product is presented as Drill String Adaptor Subs, available in a wide range of diameters, lengths, wrenching and thread size/types.
How does a DTH rotary adaptor work?
A DTH rotary adaptor is specified to connect compatible drill string components through the required upper and lower thread connections. The exact configuration depends on the drill string, dimensions, thread type and wrenching requirements.
How to choose a DTH rotary adaptor?
Start with the drill rig and existing drill string. Confirm the outside diameter, shoulder-to-shoulder length, top/bottom/crossover sub type, upper and lower thread connection size/type, wrenching details and any hard facing or special requirements.
What are DTH rotary adaptor sizes, dimensions and specifications?
DTH rotary adaptor dimensions and specifications can be defined by outside diameter, shoulder-to-shoulder length, sub type, thread size, thread type, wrenching dimensions and location, plus other specified requirements.
What DTH rotary adaptor thread and connection options are available?
North Star’s Drill String Adaptor Subs can be specified with upper and lower thread connection size and type, including API Reg, API IF and BECO.
Are you a DTH rotary adaptor manufacturer in China?
North Star is a China-based manufacturer of drilling tools. For this product range, our brochure uses the term Drill String Adaptor Subs. We manufacture configurations to specified diameters, lengths, thread connections, wrenching and other requirements.
Do you supply DTH rotary adaptors for sale or wholesale?
Yes. North Star supports DTH rotary adaptor for sale and wholesale enquiries. DTH rotary adaptor price depends on the required configuration, including diameter, length, thread connections, wrenching and other specified requirements.
DTH rotary adaptor vs rotary adapter: what is the difference?
“Adaptor” and “adapter” are spelling variants. Searchers may use DTH rotary adaptor, DTH rotary adaptors, DTH rotary adapter or DTH rotary adapters. North Star uses Adaptor Subs in its Mining & Construction product documentation.
ROTARY ADAPTORS & DRILL STRING SUBS
Need the Right Rotary Adaptor Configuration?
Send your rig model, adaptor dimensions, thread details and wrenching requirements. Our team can review the suitable Rotary Adaptor / Drill String Adaptor Sub configuration.
RELATED PRODUCTS
Complete Your Rotary Drill String
Explore North Star Rotary Drill Rods, Rotary Stabilizers and Rotary Deck Bushings for a complete Mining & Construction drilling setup.
Rotary Adaptors Selection Guide
North Star Rotary Adaptors. Drill string adaptor subs with customer-specified diameters, lengths, wrenching and thread configurations.
Configuration and Application
Specify both mating connections, including the required pin or box at each end. Confirm the adaptor diameter, shoulder-to-shoulder length and wrenching arrangement. A crossover configuration must identify the two different connections clearly.
Rotary Adaptor Requirements
When selecting rotary adaptor, provide the intended application, existing assembly details and the dimensions needed for the mating components. Include drawings, photographs or an existing part reference when available. Confirm the finished configuration with the quotation before ordering.
Related Tooling and Technical Background
Review Rotary Drill Pipes and Rotary Deck Bushings for related North Star tooling. For general background on drill string, see the drill string reference. Product-specific dimensions and compatibility remain subject to the selected configuration.
Request Rotary Adaptors
Send the required configuration, quantity and drawings for a quotation. Identify the connections and dimensions that must match the existing equipment. Our team can review the supplied information and confirm the applicable options.
