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Boring & honing

Cylinder bore reconditioning is performed on PDM's state-of-the-art boring/surfacing mill and finished on a vertical axis, hydraulic honing machine.

The process

Boring & honing

All bored blocks are finish honed to size. PDM's cylinder hone is set up to produce the correct cylinder wall surface finish and cross hatch pattern for proper piston ring break-in and oil film distribution during engine operation.

PDM's boring machine is equipped with a digital XYZ axis measuring device, which allows our specialists to do any type of indexable block machining. After machining, blocks are cleaned with a rust inhibitive detergent to remove all machining chips and honing coolant grindings.

—Where this sits

Stage 02 — precision machining

  1. 01
    Teardown & cleaning

    Complete disassembly, thermal and hot-tank cleaning, and inspection before any metal is cut.

  2. 02
    Precision machining

    Boring, honing, grinding and align boring — every cut indexed to a true relationship.

  3. 03
    Final assembly

    Careful assembly in a dedicated clean room, isolated from the rest of the operation.

→More from the shop

Also machined here.

01Crankshaft grinding & polishingJournals held to ±0.0001″ runout and taper — often no detectable deviation.View process →02Line boringBearing tunnels machined to correct diameter and alignment.View process →03Align boringCaps precision ground, torqued and re-machined to true alignment.View process →

All fifteen services →

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