Spring Blocks

NV018 - Spring Block – Cast – 5 ½" Tube

NV018 - Spring Block – Cast – 5 ½" Tube

NV018 - Spring Block – Cast – 5 ½" Tube 139.7mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 3 Fixing Lugs Boss both sides   Product codes: NV018A SPRING BLOCK - 5.1/2" - 132mm, x 1" BORE NV018B SPRIN...

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NV043 - Spring Block - Cast - 4" Tube

NV043 - Spring Block - Cast - 4" Tube

NV043 - Spring Block - Cast - 4" Tube 101.6mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 3 Lugs Boss both sides   Product Codes: NV043A SPRING BLOCK - 4" x 16swg, 1" BORE NV043B SPRING BLOCK - 4" x ...

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NV052 - Spring Block - Cast - 5" Tube

NV052 - Spring Block - Cast - 5" Tube

NV052 - Spring Block - Cast - 5" Tube 127mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Bushed or Clear Bore 3 Lugs Boss both sides   Product Codes: NV052B SPRING BLOCK - 5" - 120mm x 1" BUSH NV052C SPRING BLOCK - 5" - 1...

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NV055 - Spring Block – Cast – 5 ½" Tube

NV055 - Spring Block – Cast – 5 ½" Tube

NV055 - Spring Block – Cast – 5 ½" Tube 139.7mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 3 Lugs Boss both sides   Product Codes: NV055 SPRING BLOCK - 5.1/2" - 129mm x 1" CLEAR NV055A SPRING BLOCK ...

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NV056 - Spring Block – Cast – 5 ½" Tube

NV056 - Spring Block – Cast – 5 ½" Tube

NV056 - Spring Block – Cast – 5 ½" Tube 139.7mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 4 Lugs Boss both sides   Product Codes: NV056 --- SPRING BLOCK - 5.1/2" - 129mm x 1" CLEAR NV056A - SP...

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NV059 - Spring Block - Cast - 5" Tube

NV059 - Spring Block - Cast - 5" Tube

NV059 - Spring Block - Cast - 5" Tube 127mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 3 Lugs Ribbed Boss one side   Product Codes: NV059 --- SPRING BLOCK - 5" - BOSS REMOVED NV059A - SPRING BLOCK - 5...

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NV062 - Spring Block - Cast - 6" Tube

NV062 - Spring Block - Cast - 6" Tube

NV062 - Spring Block - Cast - 6" Tube 168.2mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 4 Lugs Boss both sides Ribbed Boss one side   Product Codes: NV062A - SPRING BLOCK - 6" - 155mm x 1.1/4" BORE...

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NV063 - Spring Block - Cast - 6" Tube

NV063 - Spring Block - Cast - 6" Tube

NV063 - Spring Block - Cast - 6" Tube 168.2mm Tube Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 4 Lugs Ribbed Boss one side Large Boss for Heavy Duty Springs   Product Codes: NV063A - SPRING BLOCK ...

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NV064 - Spring Block - Cast - 6" Tube

NV064 - Spring Block - Cast - 6" Tube

Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed 3 Lugs Boss both sides   Product Codes: NV064A - SPRING BLOCK - 6" - 157mm x 1.1/4" BORE NV064B - SPRING BLOCK - 6" - 157mm x 1.1/4" BUSH NV064C - SPRING...

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NV066 - Spring Block Cast - 6" Tube

NV066 - Spring Block Cast - 6" Tube

NV066 - Spring Block Cast - 6" Tube 168.2mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Machined Recess for Bearing Clear Bore or Bearing 4 Lugs Boss both sides Ribbed one Boss   Product Code: NV066A - SPRING BLOCK - 6" - 154mm x ...

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NV081 - Spring Block - Cast - 8" Tube

NV081 - Spring Block - Cast - 8" Tube

NV081 - Spring Block - Cast - 8" Tube 219mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore or Clear Bore 3 Lugs Boss on both sides   Product Codes: NV081A - SPRING BLOCK - 8" - 1.1/4" BORE NV081B - SPRING BLOCK - 8" - 1...

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NV083 - Spring Block - Cast - 8" Tube

NV083 - Spring Block - Cast - 8" Tube

NV083 - Spring Block - Cast - 8" Tube 219mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Clear Bore or Bushed Full Rim Boss on one side   Product Code: NV083A --- SPRING BLOCK - 8" - 202mm x 43mm  BORE 175mm U/Rim NV083B ...

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NV131 - Spring Block – Cast – 5 ½" Tube

NV131 - Spring Block – Cast – 5 ½" Tube

NV131 - Spring Block – Cast – 5 ½" Tube Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Bushed or Needle Bearing 3 Lugs Rim Boss to each side   Product codes: NV131A - SPRING BLOCK - 5.1/2" - 132mm x 1" BEARING NV131B - S...

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NV137 - Spring Block - Cast - 5" Tube

NV137 - Spring Block - Cast - 5" Tube

Available in various bore sizes, either plain or with a bush fitted. NV137 5 1⁄2" Spring Block - Raw Casting NV137A 5" Spring Block - 126.5mm x 1" Bore NV137B 5" Spring Block - 126.5mm x 11⁄4" Bore NV137C 5" Spring Block - 129mm x 25mm Bush NV137E 5" Spring Block - 127mm x 1" Bush NV...

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NV160 - Spring Block – Cast – 5 ½" Tube

NV160 - Spring Block – Cast – 5 ½" Tube

NV160 - Spring Block – Cast – 5 ½" Tube 139.6mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Machine Recessed for Bearing (See Product Code List) Plain Bore, Bushed or Needle Bearing 3 Lugs Ribbed Boss to one side   Product Codes: NV160A ...

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NV171 - Spring Block - Cast - 4" Tube

NV171 - Spring Block - Cast - 4" Tube

NV171 - Spring Block - Cast - 4" Tube 101.6mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Plain Bore, Bushed or Bearing Full Rim Boss to each side   Product Code: NV171A - SPRING BLOCK - 4" - 94mm x 1" BUSH NV171B - SPRING BLOC...

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NV276 - Universal Block - Cast - 5" Tube

NV276 - Universal Block - Cast - 5" Tube

NV276 - Universal Block - Cast - 5" Tube 127mm Ø Technical Details: Grey Cast Iron Machined O/D Machined Bore Machined Rim Face Machined Boss Spigot (See Product List) Drilled & Tapped 4 Holes M10 on 101.6mm PCD Plain Bore, Bushed or Needle Bearing Full Rim Boss to each ...

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NV277 - Universal Barrel Block - Cast - 5 ½" Tube

NV277 - Universal Barrel Block - Cast - 5 ½" Tube

NV277 - Universal Barrel Block - Cast - 5 ½" Tube This is a Universal Casting that is pre-drilled & tapped, and machined with a spigot, to accept Platewheels or Drive Gears, whilst the the inner side has a ribbed Boss to accept a Spring. The Drive End is machined with a spigot whilst th...

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Leading Supplier of Spring Blocks

Spring Blocks are used in Barrels where Torsion Springs are required. Generally, Industrial Doors and Roller Shutter Doors use Spring Blocks when the door requres to be Spring Assisted, such as a Manually Operated Shutter, a Push Up Shutter or a Shutter that has been fitted with a Flange Motor.

North Valley Metal stock and supply a wide range of Spring Blocks in Cast Iron to suit Tube sizes from 4" Ø to 8" Ø and in either Castellated or Solid Rim options.

Castellated Spring Blocks have either 3 or 4 Lugs which are designed to interlock with the corresponding Barrel Gear.

All Spring Blocks are supplied with a Boss to accept the Torsion Spring which can be either a Solid Round Boss or a Ribbed Boss depending on the Torsion Spring size to be used.

Spring Blocks are offered in a range of bore sizes and types including Plain Bore, Clear Bore, fitted with Oilite Bush or fitted with a Bearing.