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The Shed November/December 2022 issue 105 on sale now

Legendary panel maker
The unassuming Steve Roberts has been called everything from artist and magician to guru of alloy; he himself is more comfortable with the handle ‘tin basher’
Our cover story this issue is on a legend of metal shaping and motorbikes, Steve Roberts. Steve is one of this country’s most respected and admired craftsmen in these fields, and we made the journey to Whanganui to catch up with him.
His output has been prodigious; his innovations groundbreaking; his production values and eye for detail next level. Incredibly, most of his work has been conjured, beaten, and bent with ‘basic tools’ — an indispensable 1920s lathe, a homebuilt press, and an ancient wheeling machine — from a modest shed he once shared with his family’s horses

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A Primer In Hydraulics

Now that you have a basic overview of some of the components that go into making up a hydraulic system, let’s take a look at a practical application. The wood splitter is a good example.
First you need to determine what you are trying to achieve. In the case of our log splitter :
* How much force is required to split the timber?
* How fast do you want to complete a full cycle i.e. ram full out and full return?
* How much horsepower is available to power the pump?
We will illustrate an example using a single-stage pump with a safety margin of 200 bar (pressure
in bar: 1 metric bar = 14.5 lb/in²).
It must be emphasised that an oil pump does not pump pressure, but flow. Pressure is created by the load on the actuator

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