Clutch Kit Dimensions: Specification Guide for Buyers
Clutch kit dimensions are a procurement-critical specification, not a catalogue detail. For replacement and OEM sourcing, the buyer must confirm the pressure plate outside diameter, friction disc outer and hub dimensions, spline count, release bearing size, and bolt pattern compatibility before release. Small dimensional differences can affect pedal effort, disengagement travel, and service life. Driventus supplies clutch kits for aftermarket distribution, repair chains, and industrial buyers that need documented fitment control. Driventus is an independent aftermarket manufacturer; brand names are referenced for fitment only. Our production follows IATF 16949:2016 and ISO 9001:2015, with material compliance controls aligned to REACH (EC) No 1907/2006 where applicable. This guide sets out the main measurements buyers should review, how to compare equivalent kits, and which checks matter before purchase or tender approval.
What buyers mean by clutch kit dimensions
For procurement teams, *clutch kit dimensions* means the full set of physical measurements that define interchangeability. The kit normally includes a clutch cover assembly, friction disc, and release bearing, and each component has dimensions that must match the vehicle application.
Key measurements to confirm:
Friction disc outer diameter and thickness
Spline count, spline major diameter, and hub offset
Pressure plate outside diameter and mounting bolt circle
Installed clamp load range
Release bearing inner diameter and overall height
Diaphragm finger height and travel window
Rivet depth and facing thickness
If one measurement is outside the OE-equivalent window, the kit may fit physically but fail in operation. That risk is highest on high-torque diesel applications, dual-mass flywheel conversions, and vehicles with narrow release travel tolerances.
Dimensional comparison checklist for sourcing teams
Use the table below to compare quoted parts before approval. It is intended for RFQs, incoming inspection, and cross-reference validation.
Measurement
Typical check point
Why it matters
Friction disc OD
180-300 mm common passenger range
Must match cover and flywheel contact area
Disc thickness, new
Supplier-defined, commonly within ±0.2 mm control window
Affects clamp release point and wear reserve
Hub spline count
Application-specific
Incorrect count prevents shaft engagement
Hub spline major diameter
Application-specific
Controls backlash and fit
Pressure plate OD
Must align with flywheel land
Incorrect OD reduces clamp consistency
Mounting bolt pattern
PCD and hole count
Mismatch prevents installation
Release bearing ID/OD
Shaft and fork interface
Wrong bearing causes noise or failure
Bearing height
Application-specific
Alters release travel and pedal feel
</tr></thead><tbody> </tbody></table>For buyers managing multiple brands, compare the dimensions against OE 06A107065 or other application-linked references only when the cross-reference is already part of the purchasing specification. Do not approve a kit on part number alone; dimensional equivalence should be documented in the sample approval file.
Materials and tolerances that affect fit and life
Dimensional accuracy is only one part of clutch performance. Material choice and controlled tolerances determine whether the kit holds clamp load and maintains smooth engagement over service life.
Common specification points
Friction facing material: organic, semi-metallic, or ceramic blend depending on torque and heat load
Cover housing: stamped steel or cast steel, with corrosion protection on exposed surfaces
Diaphragm spring: spring steel with controlled heat treatment
Hub damper springs: specified preload and travel range
Rivet setting: consistent depth to avoid disc run-out
Typical control items in production and inspection include:
Radial run-out on the disc assembly
Axial float of the hub
Pressure plate flatness
Finger height variation across the diaphragm spring
Release bearing noise and spin resistance
Driventus production is managed under IATF 16949:2016 and ISO 9001:2015. Buyers should request the dimensional inspection record, material declaration, and relevant test report before lot release.
How to validate a clutch kit before purchase
A controlled validation process reduces returns and installation failures. For replacement programs, the dimensional review should be completed before mass order placement.
1. Confirm vehicle application, engine code, transmission code, and flywheel type. 2. Compare OE or validated sample measurements for disc OD, spline count, and bearing height. 3. Review mounting pattern and cover envelope to ensure bellhousing clearance. 4. Check release system type: cable, hydraulic, or concentric slave arrangement. 5. Request sample fitment data and dimensional report from the supplier. 6. Verify packaging traceability, lot code, and label consistency. 7. If the part is for regulated markets, confirm materials and declarations support REACH (EC) No 1907/2006 where applicable.
If your team needs a controlled programme for a vehicle line, custom manufacturing can support drawing review, sample build, and dimensional sign-off before serial supply.
What to specify in an RFQ for clutch kits
A clear RFQ reduces ambiguity and improves first-pass quality. Include the following fields whenever possible:
Vehicle application and transmission code
OE reference or validated equivalent reference
Friction disc OD, spline count, and hub offset
Pressure plate OD and bolt pattern
Release bearing ID, OD, and height
Required clamp load or torque rating range
Packaging requirement and label content
Inspection documents required with shipment
Target annual volume and forecast split
Required certification references
For distributors and wholesale buyers, this level of detail shortens sample approval time and reduces claims from dimensional mismatch. It also helps compare suppliers on a like-for-like basis rather than on catalogue description alone. Review our catalog and the quality system for document and traceability structure.
Sourcing implications for distributors and repair networks
Dimension control affects cost in three direct ways: fitment returns, installation labour, and vehicle downtime. A kit that is nominally correct but outside tolerance can pass receiving inspection and still fail at workshop level.
Procurement teams should prioritise suppliers that can provide:
Dimensional inspection reports by lot
Sample retention and traceability
Process control under IATF 16949:2016
Documented quality management under ISO 9001:2015
Material and substance declarations for export markets
For broader engine and powertrain programmes, see our catalog and custom manufacturing when a drawing-based build is required. Driventus is an independent aftermarket manufacturer; brand names are referenced for fitment only. If you need a commercial quote, request a quote with the OE reference, application details, and the required dimensions.
Frequently asked questions
The priority measurements are friction disc outer diameter, spline count, hub offset, pressure plate diameter, and release bearing height. These control both installation fit and disengagement behaviour.
Yes. Catalogue references can overlap across suppliers. Buyers should verify the dimensional drawing, inspection record, and application data before approval, especially for high-volume programmes.
Ask for dimensional inspection data, material declaration, lot traceability, and quality certification references such as IATF 16949:2016 and ISO 9001:2015 where applicable.
For dimensional validation, OE cross-reference support, or sample sourcing, send your application details and target specifications through /contact.html.
