Excavator Track Undercarriage Solutions: From 125mm to 228mm Pitch

Excavator power and efficiency are fundamentally limited by its foundation – the crawler undercarriage. For equipment owners, fleet managers, and OEM manufacturers, selecting a replacement or custom chassis is a balance of precision, load-bearing capacity, and long-term durability. At Shengde Machinery, our SDE Series provides a comprehensive range of pre-designed undercarriage solutions engineered to meet these exact needs.

The SDE Series: A Spectrum of Power and Precision

Our technical specifications for the SDE series showcase a versatile lineup that covers the entire spectrum of excavator classes. By offering a pitch range from 125mm to 228mm, we ensure that whether you are operating a compact utility excavator or a massive mining unit, there is a precision-engineered fit available.

1. Compact Excellence (125mm – 140mm Pitch)

For smaller excavators where agility and ground pressure are the primary concerns, our SDE125 and SDE140 models offer the perfect solution.

• The SDE125-05501: Features a 125mm pitch with a compact 1840mm wheelbase (Dimension A), ideal for urban construction where space is at a premium.
• Versatile 140mm Pitch: Our SDE140 range (Models 03-08) provides various axle center options, allowing for a 100% precision fit for mid-sized utility machines.

2. Mid-Range Performance (160mm – 171mm Pitch)

This is the most common range for general construction excavators.

• The SDE160 Series: With track widths (Dimension D) of 500mm, these models, such as the SDE160-20006, offer a total length (Dimension B) of over 4 meters to ensure superior stability during deep excavation tasks.
• Enhanced Stability: The 171mm pitch models (SDE160-20501 to 26501) are designed for machines that require a wider footprint and increased traction in softer soil conditions.

3. Heavy-Duty Mining & Quarrying (190mm – 228mm Pitch)

When the workload involves high-torque demands and massive static loads, the undercarriage must be built to withstand extreme stress.

• High-Load Capacity: The SDE190 and SDE203 models provide the structural integrity needed for 50+ ton machines.
• The Flagship SDE228-98001: This is our most robust pre-designed solution. It features a 228mm pitch, a track width of 700mm, and a staggering total length of 6600mm. This system is engineered for the largest mining excavators, providing maximum structural integrity and zero deformation under load.

NO.	Model	Pitch	A	B	C	D
01	SDE125-05501	125	1840	2358	509	300
02	SDE125-06001	125	1905	2424	596	300
03	SDE140-07001	140	2100	2850	777	400
04	SDE140-07002	140	2404	2992	62o	400
05	SDE140-07501	140	2544	3132	694	400
06	SDE140-09501	140	2553	3167	751	400
07	SDE140-12501	140	2699	3311	695	400
08	SDE140-13501	140	2721	3373	715	400
09	SOE160-200O1	160	2584	3356	906	500
10	SDE160-20002	160	2646	3267	776	500
11	SOE160-20003	160	2820	3545	861	500
12	SDE160-20004	160	2820	3558	865	500
13	SDE160-20005	160	3000	3729	754	500
14	SDE160-20006	160	3300	4024	753	500
15	SDE160-20501	171	2935	3732	887	500
16	SDE160-20502	171	3280	4o77	887	500
17	SDE160-26501	171	3800	4597	887	500
18	SDE190-24501	190	3166	3959	894	600
19	SDE190-30501	190	3258	4199	1051	600
20	SDE190-33501	190	3707	4517	938	600
21	SDE203-36501	203	3790	4651	1107	600
22	SDE203-37501	203	4284	5299	1032	650
23	SDE216-41501	216	3608	4590	1207	650
24	SDE216-48501	216	4374	5365	1059	650
25	SDE228-55001	228	4014	4757	886	700
26	SDE228-75001	228	4350	5093	886	700
27	SDE228-87001	228	4442	5532	1310	700
28	SDE228-98001	228	5490	6600	1387	700

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Engineering the “Shengde Standard”

Every SDE undercarriage is a product of our 26-year proven manufacturing process. We don’t just provide a frame; we provide a high-performance integrated system.

• Premium Materials: We utilize 50MnB or 40Mn2 alloy steel for all critical drive components.
• Advanced Durability: Each sprocket and track link undergoes deep induction hardening to HRC 52-58, ensuring long-term wear resistance in abrasive rocky environments.
• Precision Fit Guarantee: To eliminate costly downtime, technical dimension confirmation (Dimensions A, B, C, D) is an essential part of our process to guarantee a 100% precision fit before production begins.

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Why Choose a Complete Integrated Undercarriage?

Buying a “Complete Undercarriage” from Shengde Machinery means receiving a ready-to-mount solution. This eliminates the complexity of sourcing individual rollers, idlers, and tracks from different suppliers. Our integrated sideframes are bolt-on ready, drastically reducing maintenance time and ensuring that every component—from the hydraulic motor mounts to the track tensioners—works in perfect harmony.

Partner with the Experts

Whether you are an OEM manufacturer looking for a reliable production partner or an equipment owner needing a heavy-duty upgrade, the SDE Series offers the data-backed reliability you need. With 28 pre-designed models and full customization capabilities, Shengde Machinery is the foundation of your equipment’s success.

Contact our engineering team today to review our SDE dimension table and find the perfect fit for your excavator fleet.

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