Honing Stones for Cylinder Hone 32-90mm GEKO G02717
Key information
Availability:In stock (ready to ship)
Shipping time:immediately
Shipping cost:From 3.29 Euro
catalog number:G02717
Availability:
EAN code:5901477120121
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,18 kg
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Honing Stones for Cylinder Hone 32-90mm GEKO G02717
A set of replacement abrasive stones designed for a cylinder hone with a diameter range of 32-90 mm. The stones are used for the precise finishing of the internal surfaces of engine cylinders.
Honing stone characteristics
50 mm working length
The stone dimension provides an adequate contact surface with the cylinder, which results in even wear and preserves the flatness of the machined surface. The 50 mm length is standard for universal hones used on passenger car engines and small motorcycle engines.
Compatible with 32-90 mm hones
The stones fit the GEKO hone with a diameter range of 32-90 mm. This range covers most cylinders of 4-cylinder petrol engines (typically 70-85 mm in diameter), as well as smaller motorcycle engines and one-piece assemblies.
Set of 3 stones
Three stones positioned evenly around the hone axis provide symmetrical loading of the cylinder and precise guidance of the tool. This configuration minimises the risk of ovality or taper in the bore during machining.
Retaining pins included
The supplied fastening elements allow worn stones to be replaced quickly and safely without the need for additional tools. The retaining pins keep the stones securely in place during operation under load.
Technical specification
| Model | G02717 |
| Manufacturer | GEKO |
| Stone length | 50 mm |
| Hone diameter range | 32-90 mm |
| Number of stones in set | 3 pcs |
| Fastening elements | Retaining pins (included) |
Applications
- Reconditioning cylinders of passenger car engines (petrol and diesel)
- Finishing cylinders after reboring or re-sleeving
- Restoring the correct cylinder surface structure (plateau honing)
- Repairing motorcycle and scooter engine cylinders
- Machining cylinders of generator sets and garden machinery
- Removing scratches and localised damage from the cylinder surface
- Replacing worn stones in the GEKO 32-90 mm hone
The honing process
Honing is a finishing operation that removes the micro-irregularities left by reboring and gives the cylinder its characteristic cross-hatch pattern (usually at an angle of 45-60°). This pattern retains oil and ensures correct bedding-in of the piston rings. The stones work with a rotary and reciprocating motion, being gradually expanded until the target cylinder diameter is reached.
Use and maintenance
Before starting work, check that the stones are evenly secured in the hone and do not show excessive wear. Uneven stone wear leads to ovality in the cylinder.
During honing, generous lubrication with a dedicated honing oil or a mixture of oil and paraffin is essential. The cooling and lubricating fluid carries away heat, flushes out contaminants and prevents the stone pores from clogging.
After machining, the cylinders should be washed thoroughly with warm water and detergent, then dried and protected with a preservative oil. Any contamination left behind can damage the new piston and ring assembly.
The stones should be replaced when their surface becomes smooth (glazed) or when the depth of the abrasive grooves clearly decreases. Worn stones do not produce the correct honing pattern and extend the machining time.
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