Cross Spider Universal Joint Component | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Cross Spider

Definition

The Cross Spider is the core component of a universal joint (Cross/Yoke Assembly) that enables the transmission of rotational power between two shafts at an angle. It consists of a central body with four perpendicular arms or journals that connect to yokes, allowing for angular misalignment while maintaining constant velocity or near-constant velocity rotation in applications such as automotive drivetrains. Typically made from alloy steel, the Cross Spider is precision-machined to meet specific dimensional and mechanical requirements. Key parameters include shaft diameter (20–60 mm), overall length (80–200 mm), cross journal diameter (15–40 mm), tensile strength (800–1200 MPa per ISO 898-1), hardness (58–64 HRC per ISO 6508), tolerance grade (IT6–IT7 per ISO 286), surface roughness (Ra 0.4–0.8 µm per ISO 1302), operating temperature (-40 to 120°C), static load rating (50–200 kN per ISO 76), dynamic load rating (30–120 kN per ISO 281), and weight (1.5–8.0 kg). These values are reference ranges; actual specifications must be confirmed with the manufacturer for the specific application. The Cross Spider operates within the yokes of a universal joint, accommodating angular misalignment while transmitting torque. It is essential in automotive drivetrains, industrial machinery, and other power transmission systems. Proper selection involves verifying dimensions, load ratings, and material properties against the application's requirements. Maintenance includes regular lubrication and inspection for wear or fatigue. Failure modes include journal wear, fatigue cracking, and bearing failure, which can lead to driveline vibration or loss of power transmission. Always consult the legal manufacturer or supplier to verify model-specific values and standards.

Working Principle

The Cross Spider rotates within the yokes of the universal joint assembly. Its four journals (or trunnions) are mounted in bearings within the yokes attached to the input and output shafts. As the input shaft rotates, torque is transferred through the spider's body to the output shaft, accommodating the angular displacement between the shafts through the pivoting action at the journal bearings. This design allows for smooth power transmission even when the shafts are not perfectly aligned, which is common in automotive drivetrains and other mechanical systems.

Common Materials

Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Shaft Diameter	20–60 mm	Matches yoke bore
Overall Length	80–200 mm	Determines installation space
Cross Journal Diameter	15–40 mm	Bearing fit
Tensile Strength	800–1200 MPa	Grade 8.8–12.9ISO 898-1
Hardness	58–64 HRC	Case hardenedISO 6508
Tolerance Grade	IT6–IT7	Precision fitISO 286
Surface Roughness	Ra 0.4–0.8 µm	Bearing surfacesISO 1302
Operating Temperature	-40–120 °C	Grease dependent
Static Load Rating	50–200 kN	Peak torqueISO 76
Dynamic Load Rating	30–120 kN	Fatigue lifeISO 281
Weight	1.5–8.0 kg	Depends on size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Journal/Trunnion Part
The four protruding arms that interface with the bearing cups in the yokes, forming the pivoting points of the joint.

Material: Alloy Steel
Central Body/Hub Part
The core structure that connects the four journals and transmits torque between them.

Material: Alloy Steel
Grease Passage Optional Part
Internal channels (if present) for lubricant distribution to the journal bearings.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cross Spider.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Cross/Yoke Assembly

View system integration details

Manufacturers of Cross Spider

Manufacturer profiles associated with Cross Spider.

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Frequently Asked Questions

What is a Cross Spider used for?

A Cross Spider is used in universal joints to transmit torque between intersecting shafts while accommodating angular misalignment. It is commonly found in automotive drivetrains and industrial power transmission systems.

What materials are Cross Spiders typically made from?

According to the directory, Cross Spiders are typically made from alloy steel. The specific grade and heat treatment should be confirmed with the manufacturer for the intended application.

What are the key specifications to verify for a Cross Spider?

Key specifications include shaft diameter, overall length, cross journal diameter, tensile strength, hardness, tolerance grade, surface roughness, operating temperature, static and dynamic load ratings, and weight. These values are reference ranges and must be confirmed with the manufacturer.

How should a Cross Spider be maintained?

Regular maintenance includes proper lubrication and inspection for wear, fatigue, or bearing damage. Any signs of excessive wear or vibration should be addressed promptly to prevent failure.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 100 MPa (static), 50 MPa (dynamic)
other spec:	Max angular misalignment: 45°, Max torque capacity: 5000 Nm, Max rotational speed: 3000 RPM
temperature:	-40°C to 120°C

Cross Spider

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards