The hydraulic thread rolling machine is a cold forming metal processing equipment used to form standard external threads on cylindrical metal workpieces. It abandons traditional cutting and tapping processing methods that cut off metal materials, and adopts pure extrusion rolling molding technology without generating metal chips. The core components of each steel threading machine include high-hardness rolling dies, a stable hydraulic power unit, adjustable spindle base, automatic feeding frame, and electrical control cabinet. A hydraulic thread rolling machine relies on constant hydraulic pressure to maintain rolling force, while an automatic thread rolling machine adds auto feeding, auto discharging, and automatic pitch adjustment modules to realize unattended mass production. Widely applied in construction rebar processing, fastener factories, auto parts manufacturing, pipeline accessory workshops, and hardware processing plants, this equipment effectively improves thread strength, reduces raw material loss, and cuts long-term production costs for global manufacturers.
Hydraulic Thread Rolling Machine Parameter
| Model | YG28-40 | YG28-80 | YG28-150 | YG28-185 | YG28-200 |
| Max rolling pressure | 120KN | 150kn | 150kn | 180kn | 200kn |
| Hydraulic diameter | 5-36MM | 6-42mm | 6-48 | 10-60mm | 14-80mm |
| Rolling wheel diameter | 120-170MM | 120-170mm | 120-170mm | 175-220mm | 175-220mm |
| Max width of rolling wheel | 110MM | 110MM | 110MM | 150mm | 150mm |
| Spindle center distance | 120MM | 120MM | 120MM | 150-300mm | 150-300mm |
| Rolling wheel aperture | 54hole | 54hole | 54hole | 75hole | 75hole |
| Hydraulic power | 4kw | 2.2kw | 2.2kw | 3kw | 5.5kw |
| Main motivation | 4kw | 5.5kw | 7.5kw | 11kw | 11kw |
| Spindle speed | 36-78/min | 36-78/min | 36-78/min | 20-64/min | 20-64/min |
| Spindle tilt angle | ±5° | ±5° | ±5° | ±10° | ±10° |
| Thread length | No limited | No limited | No limited | No limited | No limited |
| Dimensions | 1.4*1.2*1.4m | 1.48*1.33*1.44m | 1.47*1.33*1.44m | 1.78*1.73*1.43m | 1.78*1.73*1.43m |
| Weight | 1100kg | 1700kg | 1800kg | 2000kg | 2600kg |
Detailed Working Principle of YG Hydraulic Thread Rolling Machine
- Workpiece Positioning: Operators or automatic feeders send pre-sized round steel blanks into the fixed material rack between two rolling dies; the spindle automatically adjusts the blank’s horizontal position to keep it centered.
- Hydraulic Pressure Output: The hydraulic station of the hydraulic thread rolling machine pushes two sets of rolling die seats to move inward synchronously, clamping the cylindrical steel blank tightly between the two thread molds with constant pressure.
- Synchronous Rotary Rolling: Two rolling dies rotate in opposite directions at the same speed; the thread tooth profile engraved on the die surface extrudes the surface of the steel rod. Instead of cutting metal, the pressure pushes the metal material to flow laterally to form complete thread crests and tooth grooves.
- Grain Structure Optimization: During extrusion, the metal internal grain lines flow continuously along the thread contour without being broken, greatly enhancing the tensile and anti-fatigue performance of the finished thread.
- Pressure Hold Molding: The hydraulic system maintains fixed rolling pressure for 2–10 seconds according to thread pitch standards, ensuring full tooth profile forming without incomplete or shallow threads.
- Automatic Unloading: After rolling finishes, the hydraulic cylinder retracts the two die seats outward; the automatic thread rolling machine uses the feeding mechanism to push finished threaded rods out for collection, then sends new blanks into the working station to start the next cycle.
5 Core Functions of a Hydraulic Thread Rolling Machine
1. Produce High-Strength Standard Threads
This is the most fundamental function of a steel threading machine. Rolled threads have 25%–30% higher tensile strength than cut threads because the metal fiber structure remains intact. Threads processed by a hydraulic thread rolling machine fully meet international ISO, GB, and DIN fastener standards, suitable for load-bearing parts such as construction rebar connectors, automobile bolt shafts, and mechanical fastening rods that require high safety factors.
2. Zero Material Waste & Lower Raw Material Cost
Traditional thread cutting produces a large number of metal chips, wasting 8%–15% of steel raw materials. Thread rolling cold forming only displaces metal without removing any material; the raw material utilization rate reaches 100%. For large fastener factories with daily output of tens of thousands of threaded rods, this can save thousands of US dollars in steel costs every month.
3. Consistent Surface Smoothness & Low Subsequent Processing
Rolled threads have mirror-level smooth surfaces without burrs, scratches, or tooth collapse defects. There is no need for secondary polishing and deburring procedures after rolling, reducing post-processing labor and equipment investment, and lowering the reject rate of finished products below 1%.
4. Wide Material & Specification Adaptability
Adjustable spindle angle, hydraulic pressure, and rolling die sets allow one steel threading machine to process multiple thread pitches, diameters, and lengths. It can handle soft copper, aluminum and high-hardness alloy steel workpieces, covering small hardware screws, medium bolt rods, and large construction rebars. Replace rolling dies within 30 minutes to switch production specifications flexibly.
5. Reduce Long-Term Equipment Maintenance Expense
High-hardness alloy rolling dies have a service life 5–8 times longer than cutting tools of lathes. Hydraulic thread rolling machine adopts sealed hydraulic oil circuits to reduce wear parts replacement frequency; automatic models have fault self-diagnosis systems to quickly locate minor failures and avoid long production shutdowns.
Hydraulic Thread Rolling Machine Factory Direct Sales-Choose YG
The complete rolling workflow realizes zero metal waste and stable high-precision thread output, solving core pain points of high reject rate, slow speed, and large raw material loss for metal processing enterprises. YG thread rolling machines have been exported to Southeast Asia, Europe, North America, and Africa, widely recognized by construction rebar factories, automobile parts suppliers, and hardware fastener manufacturers. If you need detailed technical parameters, customized rolling die solutions, or exclusive factory quotations, contact the YG international sales team.
