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Factory production of excavator bushing OEM 4443883 suitable for Hitachi 240 /240-3/240-3G/240-5A

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4443880 Excavator parts Bucket Bushing Suitable for Hitachi 200/240

OEM replacement : 4443880
Material ： 45#/40Cr/42CrMo
Applicable models ：Hitachi 200/240

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Model:
4443880

>> Product Name

Excavator bucket bushing.

>> Product Use

Mechanical connection and positioning

Precise connection: As a key component connecting the bucket and other parts of the excavator (such as boom and dipper rod), it can ensure the precise connection between the bucket and these parts, maintain the correct position and posture of the bucket during work, and ensure the accuracy and stability of the excavation action.

Stable support: Provide stable support for the bucket so that the bucket can remain in the designed working position when bearing the weight of the excavated material and the excavation force, prevent the bucket from shaking or offset, and improve the accuracy and controllability of the excavation operation.

Reducing friction and wear

Reducing friction loss: During the operation of the excavator, the bucket frequently performs various actions. The bucket bushing can effectively reduce the friction coefficient between the bucket and the connecting parts, reduce the wear caused by the relative movement of the parts, and thus extend the service life of the bucket and related connecting parts.

Protect key parts: Due to the reduction of friction, the metal surface of the connection part can be prevented from directly contacting and causing damage such as wear and scratches, which protects the bucket and the key parts such as the boom and dipper rod connected to it, reducing maintenance costs and equipment downtime.

>> The Company's Main Product Display

Hitachi pin and bushing
OEM	NAME	OEM	NAME	OEM	NAME
8102646	PIN	3088753	PIN	4402460	BUSHING
3088573	PIN	3088754	PIN	4443881	BUSHING
3088574	PIN	8125101	PIN	4409122	BUSHING
3088575	PIN	8080936	PIN	4409178	BUSHING
8102957	PIN	3079491	PIN	4723760	BUSHING
3088578	PIN	8096435	PIN	4397790	BUSHING
3088579	PIN	8092014/8090472	PIN	4443885	BUSHING
3088581	PIN	8096448/8080908	PIN	4364501	BUSHING
3088577	PIN	3102467	PIN	4443883	BUSHING
3088580	PIN	3089968	PIN	4434036	BUSHING
8094393	PIN	3092037	PIN	4358100	BUSHING
4359565	PIN	3090417	PIN	4381855	BUSHING
3038444	PIN	3090418	PIN	4630702	BUSHING
3088751	PIN	4352398	BUSHING	4381857	BUSHING
8080781	PIN	4355875	BUSHING	4443884	BUSHING
3076627	PIN	4352399	BUSHING	4724236	BUSHING
3088752	PIN	4352400	BUSHING	4724237	BUSHING
3038448	PIN	4443880	BUSHING	4438771	BUSHING
4443882	BUSHING

Excavator bushing

Excavator pin

Loader bushing

Loader pin

Construction machinery pins and bushings

>> Partial Applicable Vehicle Model Display

CAT	CAT301.7 CR	CAT313 GC	CAT323 GX	CAT333
	CAT301.4 CR	CAT312 GC	CAT323	CAT374
	CAT302 CR	CAT326 GC	CAT316 GC	CAT395
	CAT303 CR	CAT326	CAT 318D2L	CAT352
	CAT305.5	CAT320 GX	CAT330	CAT355
	CAT306.5	CAT320 GC	CAT336	CAT330 GC
	CAT307.5	CAT320	CAT350
	CAT307	CAT323 GC	CAT340
KOMATSU	PC100-3/5/6	PC200-2/3/5/6/7/8	PC270-6/7/8	PC360-7
	PC120-2/3/5/6	PC220-2/3/5/6/7/8	PC290-10/11	PC360LC-10/11
	PC130-6/8/11	PC228-1/2/3/8/10/11	PC300LC-1/2/3/5/6/7/8	PC390LC-10/11
	PC150-1/3/5/6	PC240-6/8/10/11	PC350-8
	PC160-6/7/8	PC250-6	PC350LC-6/8/10/11
SANY	SY135C	SY75C	SY245H-S	SY415H-S
	SY200C-S	SY335BH-S	SY95C	SY375IDS
	SY205C-S	SY275H	SY485H-S	SY550H
	SY215E	SY235H-S	SY485GLC-S
	SY215C-S	SY155H	SY305H-S
KOBELCO	SK210LC-10	SK200-10	SK60-8	SK140LC-8
	SK130-11	SK250-10	SK380XD-10	SK460-8
	SK75-11	SK260LC-10	SK220XD-10
	SK350LC-10	SK330-10	SK150LC-11
Hitachi	ZX130-6A	ZX260K-6A	ZX210LC-5A	ZX490LCH-5A
	ZX240-5A	ZX260LCH-5A	ZX350-6A Pro	ZX220K-6A
	ZX250-6A	ZX200C-6A	ZX360K-5A	ZX520LCH-6A
	ZX250K-5A	ZH200-5A	ZX300-6A	ZX350-6A
	ZX250LC-5A	ZX210-6A	ZX300-5A	ZX500LCH-5A
	ZX260LC-6A	ZX210K-5A	ZX370K-6A	ZX220LC-6A
	ZX195-5A	ZX360H-5A	ZX370H-6A

4381857 Precision bushings Excavator Bucket Bushing Suitable for Hitachi 330/330-3/330-3G/330-5G/330-5A

1. Raw material preparation

Cutting: Use a band saw to cut into blanks, with a 2-3mm machining allowance.

2. Machining

Rough turning: Turn the outer circle and inner hole to a single-side allowance of 0.8-1.0mm, and the surface roughness is Ra12.5μm.

Fine turning: CNC lathe processing to a dimensional tolerance of ±0.015mm, and the inner hole honing to Ra0.8μm.

Drilling: Drill oil holes and mounting holes, with a position tolerance of ≤0.1mm.

3. Heat treatment

Quenching: Heat to 830-860℃, keep warm for 40 minutes, then oil cool, and the hardness reaches HRC56-62.

Tempering: Temper at 180-200℃ for 2 hours to eliminate internal stress and maintain a hardness of HRC54-58.

4. Surface treatment

Phosphating: Form a 3-5μm phosphate film to enhance rust resistance and lubricity.

5. Quality inspection

Dimensions: CMM detects key dimensions (inner diameter φD±0.01mm, outer diameter φd±0.02mm).

Hardness: Rockwell hardness tester for random inspection HRC54-58.

Flaw detection: Magnetic particle detection for surface cracks, ultrasonic detection for internal defects.

6. Packaging and storage

Cleaning: Ultrasonic cleaning to remove oil stains.

Oiling: Spray anti-rust oil, put in PE bag and pack.

Identification: Mark the model, batch, production date and inspection pass stamp.

Manufacturing Process for High-Quality Excavator Pin Shaft

FAQs

Q1: What is the typical application for the High Quality Excavator Bucket Cylinder Upper Pin Shaft?

A1: This pin shaft is specifically designed for excavator bucket cylinders, suitable for high-demand tasks in construction, mining, and heavy machinery operations.

Q2: Can you customize the pin shaft for other machine models?

A2: Yes, we offer full customization services for pin shafts based on your specifications, ensuring compatibility with a wide range of machinery models.

Q3: How do you ensure the durability of your excavator pin shafts?

A3: We use advanced heat treatment processes and high-quality materials to enhance the hardness and wear resistance of the pin shafts, ensuring long-lasting performance.

Q4: What materials are used for manufacturing the pin shaft?

A4: Our pin shafts are made from premium alloys such as 45C, 42CrMo4, and 41Cr4, selected for their durability and ability to withstand heavy-duty use.

Q5: Do you provide after-sales support for your excavator pin shafts?

A5: Yes, we provide comprehensive after-sales support, including product guidance, warranty services, and troubleshooting assistance to ensure continued operation.

Q6: How do I place a custom order for the pin shaft?

A6: Simply provide us with your design drawings or specifications, and we’ll create a customized pin shaft tailored to your exact requirements.

Q7: Can you ship to international locations?

A7: Yes, we can deliver our high-quality excavator pin shafts worldwide, offering efficient shipping and timely delivery to your location.

Q8: Are your pin shafts compatible with other excavator brands?

A8: Our pin shafts are designed for a wide range of excavators, including those from Sany Heavy Industry, but we can also customize them for other brands as needed.