The reliability of a mobile crusher or a crawler crane is only as good as the foundation it stands on. For these machines, the undercarriage is not merely a means of transport, it is a critical structural component that must withstand immense static loads, high-frequency vibrations, and the unforgiving terrain of mining and construction sites. At Shengde Machinery, with over 26 years of specialized manufacturing experience, we understand that “standard” is rarely enough when your equipment is operating at the limit.
The Engineering Behind the SDK Series
Our latest technical specifications for crusher and crane sideframes showcase a comprehensive lineup – the SDK Series – designed to bridge the gap between heavy-duty performance and precision engineering. Spanning a pitch range from 125mm to 228mm, our systems are built to support machinery ranging from compact 0.5-ton units to massive 120-ton heavy-duty applications.
The data from our SDK dimension table reveals the sheer scale of our capabilities:
- Precision Versatility: Our SDK125-05501 offers a compact solution with a 125mm pitch, ideal for smaller mobile units that require agility without sacrificing strength.
- Heavy-Duty Dominance: At the upper end of the spectrum, the SDK228-98001 provides a staggering total length (Dimension B) of 6600mm, engineered to provide a massive footprint for maximum stability in heavy lifting or large-scale crushing.
- Customizable Widths: With track shoe widths (Dimension D) ranging from 300mm to 700mm, we ensure that ground pressure is optimized for your specific terrain, whether it is abrasive rocky soil or soft construction ground.
| No. | Model | Pitch | A | B | C | D |
| 01 | SDK125-05501 | 125 | 1840 | 2358 | 599 | 300 |
| 02 | SDK125-06001 | 125 | 1905 | 2424 | 596 | 300 |
| 03 | SDK140-07001 | 140 | 2100 | 2850 | 777 | 400 |
| 04 | SDK140-07002 | 140 | 2404 | 2992 | 620 | 400 |
| 05 | SDK140-07501 | 140 | 2544 | 3132 | 694 | 400 |
| 06 | SDK140-095O1 | 140 | 2553 | 3167 | 751 | 400 |
| 07 | SDK140-12501 | 140 | 2699 | 3311 | 695 | 400 |
| 08 | SDK140-13501 | 140 | 2721 | 3373 | 715 | 400 |
| 09 | SDK160-20001 | 160 | 2584 | 3356 | 906 | 500 |
| 10 | SDK160-20002 | 160 | 2646 | 3267 | 776 | 500 |
| 11 | SDK160-20003 | 160 | 2820 | 3545 | 861 | 500 |
| 12 | SDK160-20004 | 160 | 2820 | 3558 | 865 | 500 |
| 13 | SDK160-20005 | 160 | 3000 | 3729 | 754 | 500 |
| 14 | SDK160-20006 | 160 | 3300 | 4024 | 753 | 500 |
| 15 | SDK160-20501 | 171 | 2935 | 3732 | 887 | 500 |
| 16 | SDK160-20502 | 171 | 3280 | 4077 | 887 | 500 |
| 17 | SDK160-26501 | 171 | 3800 | 4597 | 887 | 500 |
| 18 | SDK190-24501 | 190 | 3166 | 3959 | 894 | 600 |
| 19 | SDK190-30501 | 190 | 3258 | 4199 | 1051 | 600 |
| 20 | SDK190-30501 | 190 | 3707 | 4517 | 938 | 600 |
| 21 | SDK203-36501 | 203 | 3790 | 4651 | 1107 | 650 |
| 22 | SDK203-37501 | 203 | 4284 | 5299 | 1032 | 650 |
| 23 | SDK216-41501 | 216 | 3608 | 4590 | 1207 | 650 |
| 24 | SDK216-48501 | 216 | 4374 | 5365 | 1059 | 650 |
| 25 | SDK228-55001 | 228 | 4014 | 4757 | 886 | 700 |
| 26 | SDK228-75001 | 228 | 4350 | 5093 | 886 | 700 |
| 27 | SDK228-87001 | 228 | 4442 | 5532 | 1310 | 700 |
| 28 | SDK228-98001 | 228 | 5490 | 6600 | 1387 | 700 |
Why Crusher and Crane Undercarriages Require Specialized Design
Standard excavator undercarriages often fail when applied to crushers or cranes because the stress profiles are fundamentally different.
For Mobile Crushers: Combatting Vibration
Crushers generate intense, continuous high-frequency vibrations during operation. A weak undercarriage will suffer from bolt loosening, weld cracking, and premature bearing failure. Our sideframes are reinforced at critical stress points to absorb these harmonic vibrations, ensuring the structural integrity of the entire machine remains intact over years of service.
For Crawler Cranes: Managing High Torque & Static Load
Cranes demand exceptional stability during lifts. The undercarriage must resist twisting forces and support massive static weights for extended periods. Our systems utilize deep induction-hardened components (HRC 52-58) and high-strength 50MnB or 40Mn2 alloy steel to ensure that “zero deformation” isn’t just a goal, but a guarantee.
The Shengde Advantage: 26 Years of Proven Process
As a direct factory established in 1999, Shengde Machinery has refined a production process that balances brute strength with mathematical precision.
- Material Integrity: We utilize premium 50MnB and 40Mn2 alloy steel. Unlike standard carbon steel, these alloys offer superior hardenability and toughness, which are essential for the deep induction hardening required on sprocket teeth and roller paths.
- Advanced Heat Treatment: Every component undergoes an overall heat treatment process. This ensures that the hardness is not just “skin deep” but penetrates to the core of the material, providing long-term durability against the abrasive wear common in mining environments.
- Technical Precision Fit: We recognize that in the B2B sector, a 1mm error can lead to days of costly downtime. Our engineering team provides a 1-on-1 technical drawing confirmation before a single piece of steel is cut. This process verifies every critical dimension:
- Dimension A (Axle Centers): Ensuring the wheelbase perfectly matches your machine’s center of gravity.
- Dimension C (Drive Height): Guaranteeing that hydraulic motor interfaces align perfectly with your existing power systems.
Ready-to-Mount Solutions: Streamlining Your Production
When you order an SDK series sideframe, you aren’t just getting parts; you are getting a Turnkey Integrated System. Our “What You’ll Get” promise includes a fully assembled, ready-to-mount crawler system. This eliminates the need for complex on-site welding or assembly, allowing you to mount your upper machinery and get to work immediately.
Our streamlined purchase process is designed for global efficiency:
- Requirement Analysis: We start with your specific application and load requirements.
- Parameter Documentation: We provide a technical sheet to capture every detail of your machinery.
- Engineering Planning: Our technical department develops a customized design and a transparent delivery schedule.
- Manufacturing & QC: Production follows our market-proven 26-year process, with rigorous quality checks at every stage.
Partnering for Performance
Choosing the right undercarriage is an investment in the lifespan of your equipment. With the SDK series, ranging from 125mm to 228mm pitch, Shengde Machinery provides the global market with a reliable, factory-direct source for crane and crusher track systems.
Whether you are designing a new mobile crushing plant or replacing the sideframes on a veteran crawler crane, our technical expertise and high-strength alloy steel components ensure your machine remains operational, stable, and profitable.
Ready to find the perfect fit for your equipment? Refer to our SDK dimension table and contact our engineering team today for a comprehensive technical consultation. Let us build the foundation for your next heavy-duty success.
