SI..E(S) Series Female Rod End Bearing from China Manufacturer

Maintenance Required

SI..E(S) Series Female Rod End Bearing - Metric

This Maintenance Required Rod End Bearing features a zinc-plated body with left-hand (LH) or right-hand (RH) internal threads. It consists of a robust body and a radial spherical plain bearing (GE..E(S) or GE..ES 2RS). The SI..ES series rod end bearing is equipped with a lubrication hole or grease nipple, making it a true oil-lubricated rod end bearing. This design is ideal for applications where regular maintenance is possible and maximum dynamic load capacity is required.

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SI..E(S) Series Rod End Bearing Description

The SI..E (S)/SI..ES 2RS Series is a maintenance-required rod end bearing with internal threads (left-hand or right-hand available). It consists of a rod end body and a radial spherical plain bearing (GE..E (S)/GE..ES 2RS). The rod end body is made of medium carbon steel with environmentally friendly zinc plating. It adopts a steel/steel sliding pair; both the ball and outer ring are made of heat-treated bearing steel (hardness HRC 54-60) with phosphating treatment. ES models are equipped with lubrication holes/grease nipples for regular grease injection. For specifications with d≥15, the optional 2RS double-seal structure effectively prevents dust and moisture ingress. Specifically designed for high-load, regularly maintainable internal linkage scenarios in equipment, it offers strong load-bearing capacity and compatibility with a wide range of metric sizes, serving as a core connector for internal linkages in heavy machinery.

Core Advantages

1.Steel/steel sliding pair for high load-bearing capacity

2.Maintainable design for extended service life

3.Optional double-seal structure for enhanced protection

4.Phosphating treatment for superior rust resistance

5.Modular structure for easy maintenance

Sliding Contact Pair:	Steel/Steel
Rod End Body Material:	Medium Carbon Steel,Environmental Zinc Plated
Outer Ring Material:	Bearing Steel,Heat Treatment Hardness HRC 54-60,Phosphating
Ball:	Bearing Steel,Heat Treatment Hardness HRC 54-60,Phosphating

Technical Specifications

Bearing number	Dimensions														kN LoadRatings		g Weight
Bearing number	d	d₃ 6H	B	C1	L3 min	W	d2	h1	L4	L5	d4	d₅	dk	α ≈	Dynamic	Static	g Weight
SI 6E*	6	M6×1.0	6	4.4	11	11	21	30	40.5	5	10	13	10	13	3.40	8.15	21
SI 8E*	8	M8×1.25	8	6.0	15	14	24	36	48	5	12.5	16	13	15	5.50	12.9	39
SI 10 E*	10	M10×1.5	9	7.0	20	17	29	43	57.5	6.5	15	19	16	12	8.15	17.6	61
SI 12 E*	12	M12×1.75	10	8.0	23	19	34	50	67	6.5	17.5	22	18	11	10.8	24.5	96
SI 15 ES	15	M14×2.0	12	10	30	22	40	61	81	8	21	26	22	8	17.0	36.0	180
SI 17 ES	17	M16×2.0	14	11	34	27	46	67	90	10	24	30	25	10	21.2	45.0	220
SI 20 ES	20	M20×1.5	16	13	40	32	53	77	103.5	10	27.5	35	29	9	30.0	60.0	350
SI 25 ES	25	M24×2.0	20	17	48	36	64	94	126	12	33.5	42	35.5	7	48.0	83.0	640
SI 30 ES	30	M30×2.0	22	19	56	41	73	110	146.5	15	40	50	40.7	6	62.0	110	930
SI 35 ES	35	M36×3.0	25	21	60	50	82	125	166	15	47	58	47	6	80.0	146	1300
SI 40 ES	40	M39×3.0	28	23	65	55	92	142	188	18	52	65	53	7	100	180	2000
SI 45 ES	45	M42×3.0	32	27	65	60	102	145	196	20	58	70	60	7	127	240	2500
SI 50 ES	50	M45×3.0	35	30	68	65	112	160	216	20	62	75	66	6	156	290	3500
SI 60 ES	60	M52×3.0	44	38	70	75	135	175	242.5	20	70	88	80	9	245	450	5500
SI 70 ES	70	M56×4.0	49	42	80	85	160	200	280	20	80	98	92	6	315	610	8600
SI 80 ES	80	M64×4.0	55	47	85	100	180	230	320	25	95	110	105	6	400	750	12000

Tips：
If the thread is left-hand (LH), the letter "L" must be appended to the bearing designation, e.g., SIL 18 T/K.
For bearing bore diameter d ≥ 15, the -2RS sealed variant is also available, e.g., SI 20 ES 2RS.
Models marked with an asterisk (*) do not include a lubrication hole or grease nipple.

Applications

Industrial Automation: Linkages in packaging machinery, printing presses, and textile equipment.

Construction Machinery: Control linkages for excavators, loaders, and compactors.

Material Handling: Pivot points for conveyors, lifts, and automated guided vehicles.

Off-Highway Vehicles: Steering and throttle linkages for tractors and agricultural implements.

Hydraulic & Pneumatic Cylinders: End mounts for cylinders requiring a secure male thread connection.

Why Choose Us?

When you choose Gonuo, you benefit from our integrated manufacturing and quality system, directly addressing the core concerns of overseas buyers.

Integrated Industry-Trade Manufacturing

As an integrated industry-and-trade manufacturer, we control the entire supply chain — from raw material sourcing to final assembly. This ensures unmatched batch-to-batch consistency, eliminates quality risks, and guarantees stable production for every order.

Technical Precision & Customization

Need specific thread lengths, enhanced corrosion protection, or special materials? Our experienced engineering team provides full technical support for complex designs and offers non-standard customization, focusing on tight tolerances and reliable performance for your critical applications.

Reliable Quality, Proven Consistency

Our end-to-end strict quality control (QC) processes deliver components with up to 30% longer service life under demanding conditions. We provide material certifications and test reports for complete traceability and peace of mind.

Reliable Supply & Better Value

Leveraging our mature supply chain and large-scale production, we offer stable supply, competitive pricing, and flexible MOQs (bulk or small batches). Our fast replenishment system aligns with your production schedule, helping you reduce procurement costs without compromising quality.

Two Decades of Global Trust

For over 20 years, Gonuo has been a trusted brand in precision transmission components, exporting to North America, South America, Russia, and beyond. Based in Ningbo, China, we are committed to consistent quality and long-term partnerships, serving industries worldwide.

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