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Subsoiler legs
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<blockquote data-quote="Agricast" data-source="post: 3632198" data-attributes="member: 25146"><p>All subsoiler legs should be made of high abrasion resistant metal and not mild steel.</p><p></p><p>The usual grade is 400 HB or 500 HB (on the Brinell hardness scale) of which Hardox 500 is one brand. Normal mild steel is only about 120 HB.</p><p></p><p>Wearing parts are generally made of heat treated cast or forged steel. Hardness of these should be around 450 to 500 HB too if you buy from reputable suppliers.</p><p></p><p>Drilling 500 HB steel is just possible with HSS-Co drill bits but shouldn't be "easy". We use armour piercing drills to drill our legs with and even they have to be used correctly. At £80 a bit for 16mm they are not cheap if you go at it too fast!</p></blockquote><p></p>
[QUOTE="Agricast, post: 3632198, member: 25146"] All subsoiler legs should be made of high abrasion resistant metal and not mild steel. The usual grade is 400 HB or 500 HB (on the Brinell hardness scale) of which Hardox 500 is one brand. Normal mild steel is only about 120 HB. Wearing parts are generally made of heat treated cast or forged steel. Hardness of these should be around 450 to 500 HB too if you buy from reputable suppliers. Drilling 500 HB steel is just possible with HSS-Co drill bits but shouldn't be "easy". We use armour piercing drills to drill our legs with and even they have to be used correctly. At £80 a bit for 16mm they are not cheap if you go at it too fast! [/QUOTE]
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