HHN-M Series Heavy Industrial Mounting Nuts
Engineering Overview & Structural Features
The HHN-M Series Heavy Industrial Mounting Nuts are purpose-built hydraulic press-fit tools commonly used for mounting and dismounting heavy bearings, flywheels, marine propellers, and precision shaft components. Generating smooth, continuous axial thrust at 70-80 MPa (700-800 Bar), the hydraulic nut eliminates hammer blows, thermal heating damage, and shaft scoring. Installed via internal precision threads onto shaft parts, the annular piston delivers controlled axial drive-up across M50 to Tr900 envelopes, smoothly positioning workpieces to their exact interference seating depth.
SMOOTH NON-IMPACT TOP THRUST
Generates uniform, controlled axial thrust with zero shock or mechanical impact, completely eliminating damage to expensive bearings, shafts, and precision mating seats during press-fit mounting.
70-80 MPA HIGH-PRESSURE PRESS-FIT
Operates under 700-800 Bar hydraulic pressure with effective piston areas up to 32,848 mm², delivering immense axial drive-up capacity across strokes ranging from 5 mm to 25 mm.
M50 TO TR900 EXTENSIVE SHAFT RANGE
Complete engineering spectrum covering M50x1.5 up to M200x3 metric standard threads and Tr210x4 up to Tr900x4 heavy trapezoidal threads across 27 certified standard production frame sizes.
DUAL AXIAL & RADIAL G1/4" PORTING
Engineered with G1/4" hydraulic connections on both the cylindrical outer perimeter and back face, allowing flexible hose routing in tight machine cavities and confined vessel enclosures.
HIGH-PRECISION HYDRAULIC DRIVE-UP
The HHN-M hydraulic nut screws directly onto the shaft thread adjacent to the bearing inner ring or propeller hub. Pressurizing the cylinder pushes the component onto the tapered journal smoothly, achieving the exact interference fit and clearance reduction without flame heating or impact damage:
OEM Cross-Reference & Dimensional Interchangeability
The HHN-M Series 70-80 MPa hydraulic mounting nuts provide smooth, non-impact mounting and dismounting of bearings, flywheels, and marine propellers across M50 to Tr900. Operating at 700-800 Bar with up to 25 mm axial stroke, high hydraulic thrust pushes workpieces to exact position without damaging shafts or precision mating surfaces. 700 - 800 Bar / M50 - Tr900.
Enerpac®, SPX Flow®, Power Team®, Simplex®, Hytorc®, Holmatro® and other brand names are registered trademarks of their respective owners. HydraStark is an independent manufacturer and is not affiliated with, authorized or endorsed by these companies. OEM model numbers are listed for dimensional and specification reference only; please verify fit with our engineers before ordering.
MAX PRESSURE
70-80 MPa (700-800 Bar)
SHAFT THREAD ENVELOPE
M50 to Tr900 (Metric & Trapezoidal)
AXIAL HYDRAULIC STROKE
5 mm to 25 mm Axial Travel
Real Product Details & Build Quality
Specifications
Model Number | Thread (m) | Dimensions (mm) | Stroke mm | Effective Area mm² | Weight kg | ||||
|---|---|---|---|---|---|---|---|---|---|
Outside Diam. d mm | Inner Diam. d1 mm | Piston Diam. d2 mm | Height h mm | B1 mm | |||||
| HHN-M50 | M50x1.5 | 114 | 50.5 | 104 | 38 | 4 | 5 | 3376 | 2.7 |
| HHN-M60 | M60x2 | 125 | 60.5 | 115 | 38 | 5 | 5 | 4239 | 2.8 |
| HHN-M70 | M70x2 | 135 | 70.5 | 127 | 38 | 5 | 5 | 4710 | 3.2 |
| HHN-M80 | M80x2 | 146 | 80.5 | 137 | 38 | 5 | 5 | 5181 | 3.7 |
| HHN-M90 | M90x2 | 156 | 90.5 | 147 | 38 | 5 | 5 | 5652 | 4 |
| HHN-M100 | M100x2 | 166 | 100.5 | 158 | 38 | 6 | 5 | 5987 | 4.4 |
| HHN-M110 | M110x2 | 178 | 110.5 | 169 | 38 | 6 | 5 | 6286 | 4.95 |
| HHN-M120 | M120x2 | 188 | 120.5 | 179 | 38 | 6 | 5 | 8568 | 5.25 |
| HHN-M130 | M130x2 | 198 | 130.5 | 190 | 38 | 6 | 5 | 7165 | 5.65 |
| HHN-M140 | M140x2 | 208 | 140.5 | 200 | 39 | 7 | 5 | 7605 | 6 |
| HHN-M150 | M150x2 | 220 | 150.5 | 211 | 39 | 7 | 6 | 7736 | 6.6 |
| HHN-M160 | M160x3 | 232 | 160.5 | 224 | 40 | 7 | 6 | 8002 | 7.6 |
| HHN-M170 | M170x3 | 244 | 170.5 | 235 | 41 | 7 | 6 | 8669 | 8.4 |
| HHN-M190 | M190x3 | 270 | 191 | 259 | 42 | 8 | 8 | 9266 | 10.5 |
| HHN-M200 | M200x3 | 282 | 201 | 271 | 43 | 8 | 8 | 8612 | 11.5 |
| HHN-M210 | Tr210x4 | 294 | 212 | 282 | 44 | 8 | 9 | 11728 | 12.5 |
| HHN-M220 | Tr220x4 | 306 | 222 | 293 | 44 | 8 | 9 | 11815 | 13.5 |
| HHN-M230 | Tr230x4 | 318 | 232 | 305 | 45 | 8 | 9 | 12270 | 15 |
| HHN-M250 | Tr250x4 | 342 | 252 | 329 | 46 | 9 | 10 | 13317 | 17 |
| HHN-M280 | Tr280x4 | 380 | 282 | 363 | 49 | 9 | 12 | 14683 | 22 |
| HHN-M300 | Tr300x4 | 404 | 302 | 386 | 51 | 10 | 13 | 15640 | 25 |
| HHN-M400 | Tr400x4 | 522 | 402 | 499 | 60 | 11 | 17 | 20602 | 45.5 |
| HHN-M500 | Tr500x4 | 636 | 502 | 609 | 67 | 12 | 19 | 24337 | 70 |
| HHN-M600 | Tr600x4 | 748 | 602 | 721 | 73 | 13 | 23 | 28274 | 100 |
| HHN-M710 | Tr710x4 | 870 | 712 | 840 | 78 | 15 | 20 | 30730 | 135 |
| HHN-M800 | Tr800x4 | 965 | 802 | 936 | 80 | 16 | 20 | 31770 | 161 |
| HHN-M900 | Tr900x4 | 1075 | 902 | 1043 | 86 | 17 | 25 | 32848 | 205 |
Required System Components
Frequently Asked Questions
Q1What are the key specifications of the HHN-M?
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What are the key specifications of the HHN-M?
Max Pressure: 70-80 MPa (700-800 Bar); Shaft Thread Envelope: M50 to Tr900 (Metric & Trapezoidal); Axial Hydraulic Stroke: 5 mm to 25 mm Axial Travel; Effective Area: 3,376 mm² to 32,848 mm² Massive Thrust; Hydraulic Porting: Dual G1/4" Ports (Axial & Radial). Full specifications and dimensions are given in the specification table below.
Q2Which models are available in the HHN-M series?
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Which models are available in the HHN-M series?
The specification table lists 27 models: HHN-M50, HHN-M60, HHN-M70, HHN-M80, HHN-M90, HHN-M100, HHN-M110, HHN-M120, HHN-M130, HHN-M140, HHN-M150, HHN-M160, …. For non-standard requirements, please describe them in the inquiry form.
Q3How is the HHN-M tested before shipping?
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How is the HHN-M tested before shipping?
Each unit is tested at 125% of its rated pressure before shipping (800 Bar rated, 1,000 Bar test pressure).
Q4What are the lead time, warranty and shipping options for the HHN-M?
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What are the lead time, warranty and shipping options for the HHN-M?
Lead time is typically 2–3 business days when the model is in stock and 7–35 business days otherwise. Warranty is 12 months after receipt of goods. Shipping is available by sea freight, air freight or international express (DHL, FedEx, UPS). Send your requirements through the inquiry form for an exact quotation and delivery date.