Hangzhou Xinabo Intelligent Electromechanical Technology Co., Ltd manufactures precision threading dies and accessories for engineering construction pipeline connection work. Our dies are ground for professional pipe threading machines and are supplied as complete sets, replacement dies, die heads and threading accessories for plumbing, fire protection, HVAC, MEP and industrial piping projects.
The range sits at the cutting end of the pipeline connection process: pipe is cut square, threaded to a controlled taper and pitch, then assembled with fittings that must pull up tight and hold pressure. Die geometry, material and machine interface decide whether that joint seals on the first pass.
Our Range in Precision Threading Dies & Accessories
As a Engineering Construction Pipeline Connection Solutions manufacturer, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.
We build this category around the consumable tooling that keeps threading machines productive. The range covers pipe threading dies, die heads, replacement dies and threading accessories compatible with professional pipe threading equipment, with the die sets positioned by machine type, thread standard and pipe size band.
Threading Dies
Our core die family, supplied as four-piece sets. Double-edged dies are built for intelligent threading machines; high-speed steel dies are built for electric pipe threading machines. Both are ground for accurate thread forming on carbon steel, galvanized and stainless steel pipe.
Die Heads and Replacement Dies
Replacement tooling for machines already in service, so a worn cutting edge does not idle a crew. Die heads and replacement dies are matched to the machine interface and to the thread specification in use.
Threading Accessories
Supporting items for setup, retention and day-to-day operation of threading equipment, supplied alongside die sets for workshops, construction sites and machining centres.
Die Types and Where Each One Fits
The two die families share the same quality discipline but serve different machine populations and production rhythms. Selecting between them starts with the threading machine on site, then the thread standard, then the pipe size band.
| Die type |
Machine fit |
Thread standards |
Set and size coverage |
Typical use |
| Double-Edged Threading Dies |
Intelligent threading machines |
BSPT, NPT, Metric |
Four-piece sets |
Automatic and semi-automatic threading workflows with continuous high-frequency cutting |
| High Speed Steel Threading Dies |
Electric pipe threading machines |
BSPT, NPT |
Four-piece sets: 1/2"–3/4", 1"–2", 2.5"–4" |
Workshop and on-site threading of common metal pipe |
| Die heads and replacement dies |
Compatible professional threading machines |
As specified |
Matched to machine and thread size |
Tooling replacement and distributor stock |
| Threading accessories |
Threading equipment |
— |
Per item |
Setup, retention and operating support |
Cutting Geometry and Why It Matters on Site
The double-edged structure spreads cutting load across two edges instead of concentrating it on one. In practice that reduces wear on a single edge and holds thread precision through continuous high-frequency use, which is what keeps a fire protection or MEP crew running at a steady rhythm rather than stopping to swap dies mid-batch.
High-speed steel dies are chosen for hardness, wear resistance and heat resistance during continuous thread cutting on common metal workpieces. A professional cutting tooth design with open chip removal grooves lets chips clear at high rotational speed, lowering cutting resistance and reducing tooth blockage.
Application Fit and Pipe Materials
Our dies are used across plumbing, fire protection, HVAC, MEP and industrial piping work, and on carbon steel, galvanized and stainless steel pipe as well as other metal pipe grades. Thread quality directly affects joint sealing and durability, so the die specification is set from the pipe material and wall thickness rather than from size alone.
- Carbon steel and galvanized pipe — the standard duty case for BSPT and NPT tapered threads on water, sprinkler and process lines.
- Stainless steel pipe — harder and more prone to work hardening; cutting speed, lubrication and die condition carry more weight than on mild steel.
- Aluminium and copper pipe — softer materials where sharp edges and controlled feed protect the thread profile from tearing.
- Metric and custom thread specifications — quoted where a project standard falls outside the common BSPT and NPT families.
Critical Specifications We Confirm Before Supply
A die is only correct when it matches the machine, the thread and the pipe. These are the variables we lock down with the customer before a set is released.
- Thread form and taper — BSPT or NPT tapered threads, or metric and custom profiles.
- Nominal pipe size and the size combination required in the set.
- Tooth profile, pitch and dimensional accuracy of the formed thread.
- Cutting edge geometry, grinding finish and chip clearance.
- Die material and hardness appropriate to the workpiece.
- Spindle and feed interface of the threading machine, so the die seats without additional adaptation on mainstream models.
Machine Compatibility and Line Integration
Dies are matched to the operational parameters of the threading equipment they run on. Double-edged dies are precision-machined for intelligent threading machines and suit automatic and semi-automatic workflows; high-speed steel dies are machined to the spindle and feeding structure of electric threading machines. Both are intended to assemble and run without extra adaptation on mainstream models.
Where a project combines cutting, threading and assembly, the die specification is set alongside the wider Pipe Fabrication & Installation Equipment scope, so the thread produced upstream matches the fittings and tightening equipment used downstream.
Quality Control and Acceptance
Dies are produced with fine grinding technology under strict quality control, with inspection focused on the features that decide whether a fitting pulls up tight: accurate thread forming, smooth thread surfaces without burrs, and consistent dimensional accuracy across the set. Threads are checked for clear tooth profiles and interchangeability with standard pipe fittings.
Xinabo has obtained 30 patents and holds the title of National High-tech Enterprise. Die production follows the same manufacturing and inspection discipline applied across our threading machine lines, which is where the die-to-machine fit is proven.
Information We Use to Configure Your Solution
A quotation that holds up on site starts from the working point, not from a part number alone. We prepare die and accessory proposals from the following project inputs.
| Input |
What it determines |
| Pipe material, grade, outside diameter and wall thickness |
Die material, edge geometry and cutting parameters |
| Thread standard and nominal sizes |
Thread form, pitch and set size combination |
| Threading machine make and model |
Spindle and feed interface, seating and retention |
| Joints per shift and production target |
Die type, set quantity and replacement interval planning |
| Site conditions, cutting fluid and sealant used |
Operating guidance and thread finish expectations |
| Packaging, labelling and spares plan |
Delivery scope and stock configuration |
Maintenance, Spares and Serviceability
Die life is managed, not guessed. Sets are supplied in compact packaging that stores and carries easily for workshop, site and machining centre use, and replacement dies are held as a separate supply line so a worn set can be exchanged without replacing the die head.
- Keep chip removal grooves clear; packed chips raise cutting resistance and degrade thread finish.
- Maintain cutting fluid supply and correct cutting speed for the pipe material.
- Rotate sets across shifts where production is continuous, so wear is distributed evenly.
- Replace a die when thread flanks show wear, cutting torque rises or the thread surface turns rough.
- Store dies dry and protected; edge damage in storage is a common cause of poor thread form.
Documentation, Training and Delivery Scope
Die sets ship with the thread specification and size combination identified, and our technical team provides demonstrations and training on Xinabo machinery and tooling, with spare parts support for products in service. For projects combining dies with threading equipment, the delivery scope is agreed as one package covering tooling, machine interface and spares.
Frequently Asked Questions
Which dies fit our intelligent threading machine?
Double-edged threading dies are designed for intelligent threading machines, with a precision-machined structure matched to the operational parameters of the equipment. Give us the machine model and the pipe sizes you run, and we will confirm the set configuration.
What thread standards can Xinabo dies cut?
Double-edged dies cover BSPT, NPT and metric threads. High-speed steel dies cover BSPT and NPT tapered pipe threads. Custom thread specifications can be quoted where a project standard falls outside these families.
What sizes are available?
High-speed steel dies are supplied as four-piece sets in 1/2"–3/4", 1"–2" and 2.5"–4" combinations. Double-edged dies are supplied as four-piece sets. Size combinations are confirmed against the pipe schedule and the fittings used on the project.
Can the same die set run carbon steel and stainless steel pipe?
The die type is selected for the workpiece. Stainless steel is harder and work-hardens more readily than carbon steel, so cutting speed, lubrication and edge condition need closer control. We confirm the material mix at the quotation stage so the die specification suits the hardest material in the programme.
How do we know when a die needs replacing?
Watch the thread rather than the calendar: worn flanks, a rougher thread surface, rising cutting torque or a thread that no longer gauges correctly all indicate the cutting edge has reached the end of its working life. Replacement dies are supplied separately so the die head stays in service.
Do you supply dies and accessories outside the standard sets?
Yes. As a Precision Threading Dies & Accessories manufacturer, we quote die heads, replacement dies and threading accessories alongside the standard sets, and we match the tooling to the machine interface and thread specification in use. The full Threading Dies range is listed with the die types and size bands.
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