Springs - Constant Force

Springs -> Constant Force

There are 4 products in the sub-categories of Springs - Constant Force. Browse the Springs - Constant Force products table.

Category Details

A selection of Constant Force Springs. 301 Stainless steel selection.

  • An expanded range may be available on special order. Please enquire.
  • 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.

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Springs - Constant Force category on the Small Parts & Bearings online store.
Load Capacity Band Length Thickness (t) Band Width (W) Free ID (Ref. Only) Drum Diameter Indicative
Image
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel
Load Capacity
1.0
Newtons
+/- 10%
Band Length
406.4
mm
Thickness (t)
0.102
mm
Band Width (W)
6.35
mm
Free ID (Ref. Only)
13.10
mm
Drum Diameter
16.0
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Spring Steel    Cycles Life: 20000    Mounting Holes: 1 mm    Initial Extension (f1): 24130.0 mm    Max. Working Deflection (f2): 304.8   
Deleted Item. Available while stocks last.
Part Number: CFS-0010-0406-064-S1 (Each)
Contact Us | Special Order Only - Please contact us if you need a large quantity
Load Capacity Band Length Thickness (t) Band Width (W) Indicative
Image
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel
Load Capacity
1.0
Newtons
+/- 10%
Band Length
406.4
mm
Thickness (t)
0.102
mm
Band Width (W)
6.35
mm
Constant Force Springs - 1 Newtons - 406.4x0.102 mm - Spring Steel Music Wire
Material: Spring Steel    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   
Deleted Item. Available while stocks last.
Part Number: CFS-0010-0406-064-S1 (Each)
Contact Us | Special Order Only - Please contact us if you need a large quantity | Backorder now for delivery around Sun, Apr 08, 2029
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel
Load Capacity
1.4
Newtons
+/- 10%
Band Length
381.0
mm
Thickness (t)
0.102
mm
Band Width (W)
6.35
mm
Free ID (Ref. Only)
11.11
mm
Drum Diameter
13.5
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Spring Steel    Cycles Life: 13000    Mounting Holes: 1 mm    Initial Extension (f1): 20.3 mm    Max. Working Deflection (f2): 304.8   
Deleted Item. Available while stocks last.
Part Number: CFS-0014-0381-064-S1 (Each)
2518 Available Now | Item Discontinued - Up to 2518 may be ordered online. No backorders. Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2518 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel
Load Capacity
1.4
Newtons
+/- 10%
Band Length
381.0
mm
Thickness (t)
0.102
mm
Band Width (W)
6.35
mm
Constant Force Springs - 1.4 Newtons - 381x0.102 mm - Spring Steel Music Wire
Material: Spring Steel    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   
Deleted Item. Available while stocks last.
Part Number: CFS-0014-0381-064-S1 (Each)
2518 Available Now | Item Discontinued - Up to 2518 may be ordered online. No backorders. Please contact us if you need a larger quantity
$3.00 AUD
$5.70 AUD $3.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2518 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel
Load Capacity
8.8
Newtons
+/- 10%
Band Length
812.8
mm
Thickness (t)
0.254
mm
Band Width (W)
15.88
mm
Free ID (Ref. Only)
28.18
mm
Drum Diameter
33.8
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Spring Steel    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 (Each)
441 Available Now | Further orders can be expected around Tue, Sep 22, 2026
$14.05 AUD
$14.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 441 available can be backordered.
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel
Load Capacity
8.8
Newtons
+/- 10%
Band Length
812.8
mm
Thickness (t)
0.254
mm
Band Width (W)
15.88
mm
Constant Force Springs - 8.8 Newtons - 812.8x0.254 mm - Spring Steel Music Wire
Material: Spring Steel    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 (Each)
441 Available Now | Further orders can be expected around Tue, Sep 22, 2026
$14.05 AUD
$14.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

441 Available Now. Backorder if more than 441.
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel
Load Capacity
25.9
Newtons
+/- 10%
Band Length
1371.6
mm
Thickness (t)
0.508
mm
Band Width (W)
31.75
mm
Free ID (Ref. Only)
66.68
mm
Drum Diameter
80.3
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Spring Steel    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 (Each)
44 Available Now | Further orders can be expected around Tue, Sep 22, 2026
$40.50 AUD
$40.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 44 available can be backordered.
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel
Load Capacity
25.9
Newtons
+/- 10%
Band Length
1371.6
mm
Thickness (t)
0.508
mm
Band Width (W)
31.75
mm
Constant Force Springs - 25.9 Newtons - 1371.6x0.508 mm - Spring Steel Music Wire
Material: Spring Steel    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 (Each)
44 Available Now | Further orders can be expected around Tue, Sep 22, 2026
$40.50 AUD
$40.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

44 Available Now. Backorder if more than 44.