Product?name: Constant?Force?Spring/Constant?Torque?Spring ? Constant?force?spring?HS.?Code:?73202090? ? constant?force?spring?Operating?principle: The?constant?force?spring?is?made?by?the?rolled?stainless?steel?ribbon,?through?a?particular?machine?to?stereotypia?the?high?strength?steel?ribbon,?when?it?is?straightened?by?an?external?force?,?the?constant?force?spring?will?roll?by?naturally?and?then?generate?elastic?force.?Thereby,?the?object?can?go?back?to?the?appointed?original?place. ? Application?of?constant?force?spring: 1)?Cable,?fire?damper 2)?Window,?door?and?curtain 3)?Automatic?propelling?shelf?spring 4)?Adjustment?of??LCD?and?Fan 5)?Skin?stapler,?gas?nail?gun?and?book?sewer ? Constant?force?spring?Scope: 1)?Thickness:?0.05~1.5MM 2)?Width:?2~50MM 3)?Length:?according?to?order 4)?Material:?Stainless?steel,?Carbon?Steel ? Welcome?RFQ?of?constant?force?spring:? please?send?us?below?details?for?OEM?service: 1)?material 2)?size?(?thickness,?length,?width,?inner?diameter) 3)?quantity 4)?drawings?or?sample ? You?are?right?to?choose?us: 1.?Professional?research?and?development?team. 2.Complete?first-class?fully?automatic?production?and?testing?equipment,?safety?package?and?prompt?delivery. 3.?Skilled?and?well-trained?work?team. 4.?Provided?competitive?price?and?serious?quality?control. 5.?Passed?GB/T19001-2008/ISO9001:2008?certification. ? About?Shanghai?Xieneng?spring?co.,ltd.: Shanghai?Xieneng?Spring?Co.,?Ltd.?is?a?new?hi-tech?enterprise?that?acts?as?both?manufacturer?and?exporter?from?2000.?In?recent?years,?our?company?is?supported?by?Huazhong?University?of?Science?&?Technology,?and?established?a?new?products?research?and?development?center?which?develops?the?new?products?in?order?to?meet?market's?demands?constantly.? We?are?specialized?in?all?kinds?of?carbon?and?stainless?steel?springs?as?well?as?all?kinds?of?heat?treatment?steel?strips.?Our?products?are?widely?used?in?various?kinds?of?appliances,?such?as?tool?equipment,?timers,?toys,?etc.? In?June?2006,?our?company?was?approved?by?ISO9001?System.?We?always?follow?the?principles?of?"Quality?First"?and?abide?by?the?contract.? We?will?work?with?rigorous?scientific?attitude,?the?steady?and?sure?style?of?work,?tide?of?the?fight?economic?globalization,?market-oriented,?regarding?innovating?for?motive?force,?with?talents?as?the?core,?excellent?management,?in?order?to?actualize?the?leap?two?times?of?the?company.?We?sincerely?wish?cooperate?with?customers?both?from?home?and?abroad,?create?the?beautiful?future?together. ? ? Amber?Yang ? Shanghai?Xieneng?Spring?CO.,?Ltd. ? Sales?Manager ? Language?spoken:?English, chinese ? Tel:?+86?21?6592?7157 ? Fax:?+86?21?6529?3712 ? skype:amberyang5 ? Mob/viber/whatsapp:?+86?150?2660?7947 ? Address:Room#,?1401,?No:?568,?OuYang?Road,?HongKou?district,?Shanghai,?CHINA. ? Postcode:200081 ? Website:http://www.xnspring.com/ ? ?