{"product_id":"irwin-hss-pro-tin-coated-drill-bit-4-0mm-ol-75mm-wl-43mm","title":"IRWIN HSS Pro Tin Coated Drill Bit 4.0mm OL:75mm WL:43mm","description":"\u003cp\u003eThe Irwin HSS Pro TiN drill bits are primarily designed for drilling metal and harder, tougher alloys. Compared to traditional HSS twist drill bits, speed can be increased by 40 -60% and feed by 10 -20% without reducing the life time of the drill bit significantly.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eTiN is also a poor conductor of heat, so the heat generated during the drilling process is diverted into the chips and coolant and less into the drill bit.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThese drills have a 135° split point grinding tip which ensures perfect centring and reduced drilling pressure.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe drill bit body is manufactured from high quality HSS steel coated with 2.5µ Titanium Nitride (TiN), the TiN coating has a hardness of app. 80 HRC and is very resistant to wear. TiN has a low coefficient of friction, this results in less power being consumed and less heat generated during the drilling.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe Irwin IRW10502581 HSS Pro TiN Coated Drill Bit comes in the following: Size: 4.0 x 75mm\u003c\/p\u003e\u003cbr\u003e","brand":"vendor-unknown","offers":[{"title":"Default Title","offer_id":59893437858137,"sku":"A393566","price":1.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1042\/3812\/1305\/files\/original-16_c125448d-2bd6-41f1-b7d9-de6641d18177.jpg?v=1791976557","url":"https:\/\/sbtoolsuk.com\/products\/irwin-hss-pro-tin-coated-drill-bit-4-0mm-ol-75mm-wl-43mm","provider":"SB Tools","version":"1.0","type":"link"}