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302 Stainless Steel Coil Springs Free Length For Tape Measures / Hose Reels

Categories Spiral Coil Spring
Brand Name: NV
Model Number: NV-048
Certification: ISO9001
Place of Origin: CHINA
MOQ: 100PCS
Price: negotiation
Payment Terms: Western Union, L/C, T/T
Supply Ability: 1 000 000PCS per Month
Delivery Time: 10 to 14 worker days
Packaging Details: carton packing
Material: stainless steel 302
Colour: white
Packing: carton pack
Tolerance: +/-0.1mm
Length: 100mm to 900mm as your drawing
thickness: 0.01mm to 10mm
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302 Stainless Steel Coil Springs Free Length For Tape Measures / Hose Reels

stainless steel 302 flat spiral coil springs for tape measures


Springs'Specifications:


MaterialStainless steel,carbon steel,62Si2Mn,60Si2Mn,65Mn,SK4,SK5
Load typeConstant and variable force
Thickness of material0.08mm~ 1.8mm
Wire diameter0.01mm~ 10mm
Width1mm~ 250mm
Inside diameterAs your request
Outside diameter1 mm and above.
Length of springsFree length as you need
Surface treatmentZinc plated, nickel plated, black coating,also can be done as customers request
ApplicationFurniture,industrial equipment,electronic devices,etc
EquipmentsAdvanced CNC computer spring machines with high precision and efficiency
TechnologyExperienced engineers ,technicians and Skilled Workers
CertificationISO9001:2008
AdvantageHigh quality, competitive prices,automatic production equipment, , safe package and fast delivery

Applications for power springs

  • seatbelt retractors
  • tape measures
  • retractable dog leads
  • electrical cord retractors
  • hose reels
  • wind-up toys
  • pull start on small gas-powered engines
  • tool balancers
  • valves


Power springs are identified by the many coils of strip material stored in a case, barrel, or band, and connected to a central arbor or shaft. When this shaft is rotated, the material starts to wind flat against it. This action creates an increasing torque for as many turns as it can be wound until there is no material left.


Pre-pressed or conventional power springs


Our capabilities of power springs range from 0.002 inch to 0.125 inch material thickness and from 0.030 inch to 3 inch material widths. Power springs can be made using pre-stressed (back wound) or conventional (from flat) methods. Pre-stressed power springs are spooled to a special free diameter and back wound into a housing or keeper, while conventional wound springs are manufactured and wound in the flat state. The advantages of pre-stressed springs are that it allows maximized torque from a specific material. Conventional wound power springs, however, offer increased cycle life.

Clock spring


The clock spring (also referred to as a flat torsion spring) is designed to produce a torsional force (circular movement). In contrast to the tightly coiled motor spring on the previous page, the clock spring has open coils that, when mounted correctly, reduces fricton to zero. However, torque capacity is reduced as a result. The standard range is made from rounded edge stainless steel, which affords a better fatigue life.


Constant force spring


The constant force spring consists of strip material, which has been shaped and pre-tensioned into a tightly wound roll. The spring is used in a linear movement and produces almost constant force throughout its deflection. Constant force springs can be fitted in a number of ways and extended partly or completely. There is practically no limit on extension speed and acceleration.


Automotive produce an extensive range of springs for the European Car and Light Commercial Vehicle market.


We offer our customers high quality products, professional service and excellent availability.


China 302 Stainless Steel Coil Springs Free Length For Tape Measures / Hose Reels factory
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