Kinshofer KM602 Hydraulic Cylinder Gland – Machined From Solid Cast Iron

A replacement hydraulic cylinder gland for a Kinshofer KM602 or KM622 grab bucket can be machined from solid cast iron to match the original exactly. Simply Welding machined a replacement hydraulic cylinder gland for a Kinshofer KM602-500lt clamshell grab bucket. We machined the new gland from a solid cast iron billet, and we keep Kinshofer KM602 and KM622 hydraulic cylinder glands in stock for immediate dispatch.

Job Description

We made a replacement hydraulic cylinder gland in our workshop, machining it from a solid billet to match the original gland exactly.

Material Used

Cast iron. It is self-lubricating and the chrome rod does not pick up on it, so the gland was made without the need for wear bands.

Measuring the Original

We measured the original gland and all of its features: the outside diameter, inside bore diameter, thread pitch and length, the internal grooves for the lip seal and wiper seal, and the O-ring grooves.

Facing and Drilling

We started with an oversized cast iron billet so it could be turned down to the size we needed. Both ends were faced off, then the bore was drilled from the face end, starting with a pilot hole and stepping up through larger drills to approximately 25–30mm.

Boring

With the gland held in a 3-jaw chuck and turning at around 400rpm, the centre was opened up with a boring bar fitted with indexable carbide inserts, taking a cut of around 1–2mm on each pass until it reached the required diameter.

Seal Grooves

The grooves for the U-seal (pressure seal) and wiper seal were then machined with a grooving bar and indexable inserts. The depth was monitored on a DRO (digital readout) for exact dimensional accuracy.

Setting Up for the Outside Diameter

The semi-finished gland was turned around and re-fitted in the chuck, and set running true and concentric using a DTI (dial test indicator).

Turning and Threading

We turned the outside down to its largest nominal size, then machined in the features needed to seal hydraulic oil at around 4,500psi. This gland has a 1.5mm pitch thread with a thread relief at the top, and an O-ring groove at the base to seal between the gland and the cylinder tube wall.

C-Spanner Holes

Finally, we drilled two 10mm blind holes to take a C-spanner, so the gland could be tightened securely once the ram was reassembled.

Result

A new cast iron gland, machined to match the original and ready to fit. Hydraulic cylinder glands for Kinshofer KM602 and KM622 are always in stock and available for immediate dispatch.

Frequently Asked Questions

Why are hydraulic cylinder glands made from cast iron?

Cast iron is self-lubricating and the chrome rod does not pick up on it, so a cast iron gland can run without the need for wear bands.

Can you make a one-off hydraulic cylinder gland?

Yes. We measure the original gland, including the outside diameter, bore, thread pitch and length, and all the seal and O-ring grooves, then machine a new one from solid billet to match it exactly.

Do you stock Kinshofer KM602 and KM622 glands?

Yes. Hydraulic cylinder glands for Kinshofer KM602 and KM622 grab buckets are always in stock and available for immediate dispatch.

What does the gland have to seal against?

The gland seals the hydraulic oil in the ram at around 4,500psi. On this KM602 gland, a U-seal (pressure seal) and wiper seal sit in grooves in the bore, and an O-ring groove at the base seals between the gland and the cylinder tube wall.

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Need a Kinshofer gland or a hydraulic ram repaired? Call 07747 682451 or send us some photos via WhatsApp.