{"product_id":"red-die-springs-65mn-rectangular-wire-tm-swm-medium-load-pack-of-2","title":"Red Die Springs, 65Mn Rectangular Wire — TM\/SWM Medium Load — Pack of 2","description":"\u003cp\u003eRed rectangular-wire die springs in 65Mn spring steel, electrophoretic-coated, for mold and die maintenance or replacement. Sold in packs of 2. Sizes are given as \u003cstrong\u003eoutside diameter × free length\u003c\/strong\u003e in millimetres.\u003c\/p\u003e\n\n\u003ch2\u003eLoad class — read this before ordering\u003c\/h2\u003e\n\u003cp\u003eThese springs follow the \u003cstrong\u003eJIS-style colour system, where red is TM — medium load\u003c\/strong\u003e. It sits one class above blue (light) and two above yellow (extra light) in the same dimensional range.\u003c\/p\u003e\n\u003cp\u003eUnder ISO 10243, red means \u003cem\u003eheavy\u003c\/em\u003e — one class higher again. Red is the one colour that shifts by a single step rather than inverting, which makes it easier to get wrong than yellow or green: an ISO red spring and a JIS red spring drop into the same pocket and give you noticeably different force. If your drawing calls out ISO 10243, tell us the load you need and we will confirm the right part rather than matching on colour.\u003c\/p\u003e\n\n\u003ch2\u003eMaximum compression depends on the life you need\u003c\/h2\u003e\n\u003cp\u003eCompression limits are quoted against a cycle count, and confusing the two figures is the commonest reason die springs fail early. For red TM:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eCycle life\u003c\/th\u003e\n\u003cth\u003eMax compression (% of free length)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e300,000 cycles\u003c\/td\u003e\n\u003ctd\u003e32%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500,000 cycles\u003c\/td\u003e\n\u003ctd\u003e28.8%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1,000,000 cycles\u003c\/td\u003e\n\u003ctd\u003e25.6%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolid (reference only)\u003c\/td\u003e\n\u003ctd\u003e35%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eDesign a long-run production tool against the 25.6% figure and treat 32% as a short-life limit rather than as headroom. The solid figure is a reference for clearance calculations, not an operating condition. A spring that comes out of the tool shorter than its original free length has already been over-compressed and will not recover.\u003c\/p\u003e\n\n\u003ch2\u003eMaximum compression load by outside diameter\u003c\/h2\u003e\n\u003cp\u003eRed TM, at 32% compression — the 300,000-cycle basis. These values depend on outside diameter alone: a 25 × 100 spring has the same limit load as a 25 × 30. Free length changes the available stroke, not the peak force. \u003cstrong\u003eFor the one-million-cycle basis (25.6%), multiply by 0.8.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eOD (mm)\u003c\/th\u003e\n\u003cth\u003eID (mm)\u003c\/th\u003e\n\u003cth\u003eMax load (kgf)\u003c\/th\u003e\n\u003cth\u003eMax load (N)\u003c\/th\u003e\n\u003cth\u003eMax load (lbf)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e785\u003c\/td\u003e\n\u003ctd\u003e176\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e125\u003c\/td\u003e\n\u003ctd\u003e1226\u003c\/td\u003e\n\u003ctd\u003e276\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e180\u003c\/td\u003e\n\u003ctd\u003e1765\u003c\/td\u003e\n\u003ctd\u003e397\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e17.5\u003c\/td\u003e\n\u003ctd\u003e244.7\u003c\/td\u003e\n\u003ctd\u003e2400\u003c\/td\u003e\n\u003ctd\u003e540\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e320.2\u003c\/td\u003e\n\u003ctd\u003e3140\u003c\/td\u003e\n\u003ctd\u003e706\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese are limit values. For a working design, keep normal operating compression well below the limit — running at the maximum shortens fatigue life sharply.\u003c\/p\u003e\n\n\u003ch2\u003eSame size, different load class\u003c\/h2\u003e\n\u003cp\u003eAll three colours we stock share outside diameters and free lengths, so they are dimensionally interchangeable at the same OD. What changes is the force and the usable stroke. At Ø25, for comparison: yellow gives 50 kgf at 50% compression, blue 84 kgf at 40%, red 125 kgf at 32%. More force, less travel, in that order.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/yellow-die-springs-65mn-rectangular-wire-tf-swf-extra-light-load-pack-of-2\"\u003eYellow — TF, extra light\u003c\/a\u003e. Least force, most travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/blue-die-springs-65mn-rectangular-wire-tl-swl-light-load-pack-of-2\"\u003eBlue — TL, light\u003c\/a\u003e. The general-purpose middle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed — TM, medium\u003c\/strong\u003e (this page). Ø20 and above only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen red is the right choice\u003c\/h2\u003e\n\u003cp\u003eRed is the class to reach for when you have run out of pocket. If a blue spring of the outside diameter your plate will take cannot generate the force you need, you have two options: go to a bigger outside diameter, or go up a load class at the same diameter. Where the bore is fixed — a stripper plate, an ejector return, a slide retention pocket you cannot enlarge — going up a class is the only route.\u003c\/p\u003e\n\u003cp\u003eThe trade is stroke. Red gives you 1.5 times the blue load at the same OD but only 32% compression against blue's 40%, so check your working compression against the limit before you commit rather than after. If you need both force and travel in a fixed pocket, the answer is usually two shorter springs in series or a redesign of the pocket, not a harder spring run near its limit.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e65Mn spring steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWire section\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElectrophoretic coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eService temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e−30 °C to +150 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColour \/ code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed, TM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLoad class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMedium (JIS-style system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes available\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eØ20, Ø25, Ø30, Ø35, Ø40 × 25–100 mm free length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDanyang, Jiangsu, China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eRed is not made below Ø20 in this range. If you need medium load in a smaller bore, ask — we will tell you honestly whether it exists or whether you are better served by a blue spring at the next diameter up.\u003c\/p\u003e\n\n\u003ch2\u003eNeed something else?\u003c\/h2\u003e\n\u003cp\u003eØ50 and Ø60 red, free lengths beyond 100 mm, and green TH heavy-load springs are all available. \u003ca href=\"\/pages\/request-a-quote\"\u003eRequest a quote\u003c\/a\u003e with your size, required load and expected cycle life and we will come back within one business day.\u003c\/p\u003e\n\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eInternational freight is calculated on packed chargeable weight. See \u003ca href=\"\/pages\/shipping-delivery\"\u003eShipping \u0026amp; Delivery\u003c\/a\u003e for destinations and transit times. Import duties and taxes are the buyer's responsibility — please read the duties section on that page before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eDiagram is dimensional and applies to all colours in this range.\u003c\/em\u003e\u003c\/p\u003e","brand":"Privley Mold Components","offers":[{"title":"20 × 25","offer_id":52426297508060,"sku":"PMC-DIER-001","price":14.9,"currency_code":"USD","in_stock":true},{"title":"20 × 30","offer_id":52426297540828,"sku":"PMC-DIER-002","price":15.9,"currency_code":"USD","in_stock":true},{"title":"20 × 40","offer_id":52426297573596,"sku":"PMC-DIER-003","price":16.9,"currency_code":"USD","in_stock":true},{"title":"20 × 50","offer_id":52426297606364,"sku":"PMC-DIER-004","price":17.9,"currency_code":"USD","in_stock":true},{"title":"20 × 60","offer_id":52426297639132,"sku":"PMC-DIER-005","price":18.9,"currency_code":"USD","in_stock":true},{"title":"20 × 80","offer_id":52426297671900,"sku":"PMC-DIER-006","price":20.9,"currency_code":"USD","in_stock":true},{"title":"20 × 100","offer_id":52426297704668,"sku":"PMC-DIER-007","price":22.9,"currency_code":"USD","in_stock":true},{"title":"25 × 25","offer_id":52426297737436,"sku":"PMC-DIER-008","price":16.9,"currency_code":"USD","in_stock":true},{"title":"25 × 30","offer_id":52426297770204,"sku":"PMC-DIER-009","price":17.9,"currency_code":"USD","in_stock":true},{"title":"25 × 40","offer_id":52426297802972,"sku":"PMC-DIER-010","price":18.9,"currency_code":"USD","in_stock":true},{"title":"25 × 50","offer_id":52426297835740,"sku":"PMC-DIER-011","price":19.9,"currency_code":"USD","in_stock":true},{"title":"25 × 60","offer_id":52426297868508,"sku":"PMC-DIER-012","price":20.9,"currency_code":"USD","in_stock":true},{"title":"25 × 80","offer_id":52426297901276,"sku":"PMC-DIER-013","price":22.9,"currency_code":"USD","in_stock":true},{"title":"25 × 100","offer_id":52426297934044,"sku":"PMC-DIER-014","price":24.9,"currency_code":"USD","in_stock":true},{"title":"30 × 30","offer_id":52426297966812,"sku":"PMC-DIER-015","price":18.9,"currency_code":"USD","in_stock":true},{"title":"30 × 40","offer_id":52426297999580,"sku":"PMC-DIER-016","price":19.9,"currency_code":"USD","in_stock":true},{"title":"30 × 50","offer_id":52426298032348,"sku":"PMC-DIER-017","price":20.9,"currency_code":"USD","in_stock":true},{"title":"30 × 60","offer_id":52426298065116,"sku":"PMC-DIER-018","price":21.9,"currency_code":"USD","in_stock":true},{"title":"30 × 80","offer_id":52426298097884,"sku":"PMC-DIER-019","price":23.9,"currency_code":"USD","in_stock":true},{"title":"30 × 100","offer_id":52426298130652,"sku":"PMC-DIER-020","price":25.9,"currency_code":"USD","in_stock":true},{"title":"35 × 35","offer_id":52426298163420,"sku":"PMC-DIER-021","price":20.9,"currency_code":"USD","in_stock":true},{"title":"35 × 40","offer_id":52426298196188,"sku":"PMC-DIER-022","price":21.9,"currency_code":"USD","in_stock":true},{"title":"35 × 50","offer_id":52426298228956,"sku":"PMC-DIER-023","price":22.9,"currency_code":"USD","in_stock":true},{"title":"35 × 60","offer_id":52426298261724,"sku":"PMC-DIER-024","price":23.9,"currency_code":"USD","in_stock":true},{"title":"35 × 80","offer_id":52426298294492,"sku":"PMC-DIER-025","price":25.9,"currency_code":"USD","in_stock":true},{"title":"35 × 100","offer_id":52426298327260,"sku":"PMC-DIER-026","price":27.9,"currency_code":"USD","in_stock":true},{"title":"40 × 40","offer_id":52426298360028,"sku":"PMC-DIER-027","price":22.9,"currency_code":"USD","in_stock":true},{"title":"40 × 50","offer_id":52426298392796,"sku":"PMC-DIER-028","price":23.9,"currency_code":"USD","in_stock":true},{"title":"40 × 60","offer_id":52426298425564,"sku":"PMC-DIER-029","price":24.9,"currency_code":"USD","in_stock":true},{"title":"40 × 80","offer_id":52426298458332,"sku":"PMC-DIER-030","price":25.9,"currency_code":"USD","in_stock":true},{"title":"40 × 100","offer_id":52426298491100,"sku":"PMC-DIER-031","price":27.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/7650\/9916\/files\/red-die-springs-pack-of-2-main.png?v=1788927181","url":"https:\/\/privleymold.com\/products\/red-die-springs-65mn-rectangular-wire-tm-swm-medium-load-pack-of-2","provider":"Privley Mold Components","version":"1.0","type":"link"}