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Biconcial Coil Spring

Biconcial Coil Spring

SKU:SB94

Regular price $4.50
Regular price Sale price $4.50
SAVE Liquid error (snippets/price line 131): divided by 0% Sold out
GST included. Shipping calculated at checkout.
Size
Gauge

9 available now

  • If on backorder, this item will typically ship to you in 14 days

Biconical (aka hourglass or coil) springs are placed inside a frame by secured onto jute webbing, rails or onto a wooden base. The top of the springs compressed and tied together with jute twine, &/or sewing onto hessian. Use a large curved needle for sewing jute webbing. Place a layer of felted spring pad on top of the springs, and under the stuffings. (webbing, twine, hessian, pad and stuffings sold separately).

What gauge of spring? Use 9g coil springs for seats, and 10g for backs.

What height spring? The height of the spring has many different factors, but here is a general rule of thumb -- measure the height of the side frame and add 10-12cm. For instance, if the frame is 8cm high, buy a spring about 18-20cm.

How much should I compress the spring? Press the spring down with your hand. When you feel the spring starting to resist, that is the height to tie it off at. Basically, you want to compress it enough to give you enough resistance on the top padding and fabric, but not so much that it starts to force the bottom out.

HANDY HINT: If a coil spring is worn out or broken, it must be replaced. A worn spring can be tested by setting the spring on a table and pressing it down with the flat of your hand. Replace the spring if it begins to sag to one side.

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Frequently Asked Questions

Order Processing

In-stock items: Our goal is to dispatch in-stock items within 2-5 working days, but our turnaround time is typically faster than that.

Backorder: This means its not in stock but we will order this in for you. The estimated dispatch time for the out-of-stock item is typically written on the product page.

More info here.

Shipping Fees & Options

We ship to NZ and AUS. Most standard orders have calculated shipping fees at checkout.

Large or bulky orders may incur additional shipping fees, and we'll contact you to discuss options and extra costs.

Certain items are NZ only and/or pickup only due to size, hazard, or other delivery restrictions.

Not all delivery options are visible for every product to every locations.

Economy Courier: We will send your parcel by the cheapest courier to your location using either Castle Parcels, Post Haste, Aramex or NZ Post.

NZ Post: We will courier your parcel only via NZ Post.

Oversized order: Shipping surcharge may apply, in addition to amount already paid.

Oversized item: Shipping options and costs will be discussed with you, or item may need to be picked up.

Delivery Times

Our target delivery* estimates are:

  • Auckland 1-3 working days
  • North Island 2-4 working days
  • South Island 3-6 working days 
  • Allow extra 1-4 working days for non-urban &/or rural deliveries
  • Australia 1-3 weeks

*Delivery times may vary depending on your exact location. Delays can occur within the courier networks during peak times.

Change of Mind Returns

Eligible products can be returned within 30 days of the purchase.

View our Returns & Refunds policy for more details on change of mind returns.