{"product_id":"technique-swiss-made-hammer-handpiece-duplex-spring-3000rpm","title":"Technique Swiss Made Hammer Handpiece with Duplex","description":"\u003cp\u003eThe Technique Swiss Made Hammer Handpiece with Duplex Spring is a reciprocating hammer handpiece engineered for precision metalwork. Technique is recognized for producing high-quality quick-change handpieces, and this model carries that same commitment to craftsmanship. The slender, lightweight design makes it comfortable for extended bench use, and the adjustable stroke length allows the jeweler to dial in exactly the right impact for the task at hand. The handpiece includes one non-hardened tip and arrives with the duplex spring attachment already fitted.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant motor requirement:\u003c\/strong\u003e This handpiece \u003cstrong\u003emust\u003c\/strong\u003e be operated with a Low Speed High Torque Foredom motor (item 134.159). Running it on any other motor configuration will shorten the life of the duplex spring. Keep in mind that the foot pedal controls speed, not power.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBefore purchasing the duplex spring model, please read carefully:\u003c\/strong\u003e Duplex springs are not manufactured by Technique and are attached post-factory. Duplex springs — and all parts related to the USA-made duplex spring connections — carry \u003cem\u003eno warranty\u003c\/em\u003e. Do not bend the duplex spring beyond 45 degrees during use. Bending beyond 45 degrees or improper detachment of the handpiece from the flex shaft can cause damage. Duplex springs can also fail during normal use. If you select this model, consider purchasing additional inner duplex springs and learning how to replace them. Replacement inner duplex spring part numbers: single piece — 134.279 (Foredom HP76); pack of 12 — 134.280 (Foredom HP76B).\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReciprocating hammer action with adjustable stroke length\u003c\/li\u003e\n\u003cli\u003eSlender, lightweight handpiece design for comfortable extended use\u003c\/li\u003e\n\u003cli\u003eDuplex spring attachment included (fitted post-factory)\u003c\/li\u003e\n\u003cli\u003eOne non-hardened tip included\u003c\/li\u003e\n\u003cli\u003eMaximum speed: 3,000 RPM\u003c\/li\u003e\n\u003cli\u003eSwiss made by Technique\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003e13 mm (1\/2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength (excluding tip)\u003c\/th\u003e\n\u003ctd\u003e257 mm (10-1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e155 g (5-3\/8 oz. AV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Speed\u003c\/th\u003e\n\u003ctd\u003e3,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStroke Length\u003c\/th\u003e\n\u003ctd\u003eAdjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired Motor\u003c\/th\u003e\n\u003ctd\u003eLow Speed High Torque Foredom motor (item 134.159)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e60 days on handpiece; duplex spring attachment has no warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 Technique Swiss Made Hammer Handpiece with duplex spring attachment\u003c\/li\u003e\n\u003cli\u003e1 non-hardened tip\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe duplex spring is not manufactured by Technique and carries no warranty.\u003c\/li\u003e\n\u003cli\u003eDo not bend the duplex spring beyond 45 degrees during use or when detaching from the flex shaft.\u003c\/li\u003e\n\u003cli\u003eDuplex springs may fail during normal use — having spare inner springs on hand is strongly recommended.\u003c\/li\u003e\n\u003cli\u003eReplacement inner duplex spring: item 134.279 (Foredom HP76, single); item 134.280 (Foredom HP76B, pack of 12).\u003c\/li\u003e\n\u003cli\u003eThis handpiece requires the Low Speed High Torque Foredom motor (item 134.159) — use of any other motor may reduce duplex spring life.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Technique","offers":[{"title":"Default Title","offer_id":43583254986966,"sku":"134.732","price":440.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/technique-swiss-made-hammer-handpiece-with-duplex-otto-frei.jpg?v=1719956715","url":"https:\/\/www.ottofrei.com\/products\/technique-swiss-made-hammer-handpiece-duplex-spring-3000rpm","provider":"Otto Frei","version":"1.0","type":"link"}