Springs - Constant Force

4 Products in this selection
  • 301 Stainless Steel
  • Mounting hole specifications will be supplied on request. These springs are usually mounted on a drum and the free end attached to a loading force like a counterbalance.
  • Free ID may vary to meet load specification.
  • Load capacity can be increased by using multiple strips in tandem, back to back or laminated.
  • Be sure to leave at least 40mm coiled on the drum at full extension. The spring ID will wrap tightly on the drum so that most applications require no fastening to the drum.
Additional resources:

A more comprehensive listing may be found on the MBA Minibearings main store at Springs - Constant Force.
Load Band Length Thickness (t) Band Width (W) Free ID (Ref. Only) Drum Diameter Indicative
Image
1.0
Newtons
+/- 10% 		406.4
mm 		0.102
mm 		6.35
mm 		13.10
mm 		16.0
1038238 | CFS-0010-0406-064-S1 (10 Pcs) --- Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 24130.0 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0010-0406-064-S1 (10 Pcs) Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
1 pack (10 pcs) Available Now | Item Discontinued - Only the quantity available may be ordered - Please contact us if you need a larger quantity
$20.00 AUD
$38.00 AUD $20.00 AUD
Per 10
Load Band Length Thickness (t) Band Width (W) Indicative
Image
1.0
Newtons
+/- 10% 		406.4
mm 		0.102
mm 		6.35
mm 		1038238 | CFS-0010-0406-064-S1 (10 Pcs) --- Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Free ID (Ref. Only): 13.10 mm    Drum Diameter: 16.0    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 24130.0 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0010-0406-064-S1 (10 Pcs) Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
1 pack (10 pcs) Available Now | Item Discontinued - Only the quantity available may be ordered - Please contact us if you need a larger quantity
$20.00 AUD
$38.00 AUD $20.00 AUD
Per 10
1.4
Newtons
+/- 10% 		381.0
mm 		0.102
mm 		6.35
mm 		11.11
mm 		13.5
1038947 | CFS-0014-0381-064-S1 --- Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 20.3 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0014-0381-064-S1 Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
2648 Available Now | Item Discontinued - Only the quantity available may be ordered - Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
1.4
Newtons
+/- 10% 		381.0
mm 		0.102
mm 		6.35
mm 		1038947 | CFS-0014-0381-064-S1 --- Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Free ID (Ref. Only): 11.11 mm    Drum Diameter: 13.5    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 20.3 mm    Max. Working Deflection (f2): 304.8   
Part Number: CFS-0014-0381-064-S1 Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
2648 Available Now | Item Discontinued - Only the quantity available may be ordered - Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
8.8
Newtons
+/- 10% 		812.8
mm 		0.254
mm 		15.88
mm 		28.18
mm 		33.8
1085235 | CFS-0088-0813-159-S1-TW --- Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 50.8 mm    Max. Working Deflection (f2): 609.6   
Part Number: CFS-0088-0813-159-S1-TW Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
450 Available Now | Further orders can be expected around Sun, Jun 15, 2025
$17.05 AUD
$17.05 AUD
Each
8.8
Newtons
+/- 10% 		812.8
mm 		0.254
mm 		15.88
mm 		1085235 | CFS-0088-0813-159-S1-TW --- Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Free ID (Ref. Only): 28.18 mm    Drum Diameter: 33.8    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 50.8 mm    Max. Working Deflection (f2): 609.6   
Part Number: CFS-0088-0813-159-S1-TW Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
450 Available Now | Further orders can be expected around Sun, Jun 15, 2025
$17.05 AUD
$17.05 AUD
Each
View the product page first if you are unsure.
25.9
Newtons
+/- 10% 		1371.6
mm 		0.508
mm 		31.75
mm 		66.68
mm 		80.3
1136834 | CFS-0259-1372-318-S1-TW --- Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 120.7 mm    Max. Working Deflection (f2): 914.4   
Part Number: CFS-0259-1372-318-S1-TW Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
44 Available Now | Further orders can be expected around Sun, Jun 15, 2025
$45.23 AUD
$45.23 AUD
Each
25.9
Newtons
+/- 10% 		1371.6
mm 		0.508
mm 		31.75
mm 		1136834 | CFS-0259-1372-318-S1-TW --- Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Spring Steel Music Wire    Free ID (Ref. Only): 66.68 mm    Drum Diameter: 80.3    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 120.7 mm    Max. Working Deflection (f2): 914.4   
Part Number: CFS-0259-1372-318-S1-TW Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
44 Available Now | Further orders can be expected around Sun, Jun 15, 2025
$45.23 AUD
$45.23 AUD
Each
View the product page first if you are unsure.