Pressure Plate Mounting Points: Bolt Hole Diameter 8-12 mm

Component Specifications

Definition

Pressure plate mounting points are precisely engineered attachment locations on a clutch cover designed to securely fasten the pressure plate. These points ensure proper alignment, force distribution, and thermal stability between the pressure plate and clutch cover, enabling the clutch to engage and disengage smoothly by transmitting torque from the engine flywheel through the friction disc.

Working Principle

These mounting points function as rigid connection interfaces that transfer clamping force from the clutch cover's diaphragm spring to the pressure plate. When the clutch is engaged, the spring force is evenly distributed through these points to clamp the friction disc against the flywheel. During disengagement, the release mechanism relieves pressure at these points, allowing the pressure plate to retract.

Materials

Typically made from medium-carbon steel (e.g., SAE 1045) or alloy steel (e.g., SAE 4140) for strength and fatigue resistance. Often heat-treated to HRC 28-35 for durability. May include corrosion-resistant coatings like zinc plating or phosphate treatment.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thread Pitch	M8x1.25 to M12x1.75
Mounting Pattern	3-6 bolt circular pattern
Surface Hardness	HRC 28-35
Bolt Hole Diameter	8-12 mm
Flatness Tolerance	≤0.1 mm
Torque Specification	25-60 Nm

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

Standards

ISO/TS 16949, DIN 267, SAE J429

Parent Products

This component is used in the following industrial products

Clutch Cover

The outer housing of a clutch assembly that encloses and protects internal components while providing structural support.

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Engineering Analysis

Risks & Mitigation

Thread stripping from over-torquing
Thermal warping under high clutch temperatures
Fatigue cracking from cyclic loading
Corrosion in harsh environments

FMEA Triads

Trigger: Improper torque application during assembly
Failure: Stripped threads leading to loose pressure plate attachment
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications; implement torque audit procedures

Trigger: Excessive clutch slippage generating high temperatures
Failure: Thermal deformation of mounting points causing misalignment
Mitigation: Proper clutch adjustment and driver education; use heat-resistant materials and coatings

Trigger: Material fatigue from repeated clutch engagements
Failure: Crack propagation at mounting point bases
Mitigation: Regular inspection protocols; design with adequate fatigue strength margins; use forged rather than cast components

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Positional tolerance ±0.2 mm, perpendicularity 0.1 mm relative to clutch cover mating surface

Test Method

Coordinate measuring machine (CMM) verification, torque-to-yield testing, thermal cycling tests per SAE J1802

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Pressure Plate Mounting Points

Manufacturer profiles associated with Pressure Plate Mounting Points.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What happens if pressure plate mounting points are misaligned?

Misalignment causes uneven pressure distribution, leading to premature clutch wear, vibration, chatter during engagement, and potential clutch slippage under load.

Can damaged mounting points be repaired?

Minor thread damage can sometimes be repaired with thread inserts (helicoils), but severely damaged or warped mounting points typically require complete clutch cover replacement for safety and performance.

How do mounting points affect clutch performance?

Proper mounting ensures even spring force distribution, maintains thermal stability under high temperatures, prevents warping, and ensures consistent clutch engagement characteristics throughout the component's lifespan.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Pressure Plate Mounting Points