SPK – Flanged wheel and caster series
Cast iron flanged wheels
The wheels in the SPK series are made from high-quality gray cast iron with machined treads and edges. These features improve concentricity. Due to their hardness of 180 to 220 HB, the wheels provide excellent rolling and swivel resistance. They are also highly resistant to wear. The wheels in this series meet the tread requirements specified in crane rail standard DIN 536.
The wheels are frequently used for rail vehicles and for machine and systems engineering applications. They are also used in mobile shelving systems.
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SPK – Wheels
The wheels in the SPK series are available in sizes 2 to 10 inch with a ball bearing and plain bore.
Wheel Ø without
flange
[inch]Wheel Ø
including flange
[inch]Wheel
width
[inch]Running
width
[inch]Flange
location
[inch]Load capacity
at +158 °F
[lbs]Bearing type
Axle bore Ø
[inch]Hub
length
[inch]SPK 50G 2 2 ⁷⁄₁₆ 1 ¹⁄₄ 1 ¹⁄₄ 880 plain bore ⁹⁄₁₆ 1 ¹⁄₄ To the product SPK 75G 3 4 1 ⁹⁄₁₆ 1 ³⁄₁₆ ⁹⁄₁₆ 1,545 plain bore ¹³⁄₁₆ 1 ⁷⁄₈ To the product SPK 75K 3 4 1 ⁹⁄₁₆ 1 ³⁄₁₆ ⁹⁄₁₆ 1,545 ball bearing ¹³⁄₁₆ 1 ⁷⁄₈ To the product SPK 100G 4 5 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,765 plain bore ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 100K 4 5 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,765 ball bearing ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 125G 5 5 ¹¹⁄₁₆ 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,985 plain bore ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 125K 5 5 ¹¹⁄₁₆ 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,985 ball bearing ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 150G 6 7 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 2,205 plain bore ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 150K 6 7 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 2,205 ball bearing ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 180G 7 ¹⁄₁₆ 8 ¹⁄₄ 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 2,645 plain bore 1 ³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 180K 7 ¹⁄₁₆ 8 ¹⁄₄ 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 2,645 ball bearing ¹³⁄₁₆ 2 ¹⁄₁₆ To the product SPK 200G 8 9 ¹⁄₁₆ 2 ¹⁄₁₆ 1 ¹⁄₂ ¹³⁄₁₆ 3,305 plain bore 1 ³⁄₁₆ 2 ³⁄₈ To the product SPK 200K 8 9 ¹⁄₁₆ 2 ¹⁄₁₆ 1 ¹⁄₂ ¹³⁄₁₆ 3,305 ball bearing 1 2 ³⁄₈ To the product SPK 201K 8 9 ¹⁄₁₆ 3 ¹⁄₈ 2 ³⁄₈ 1 6,615 ball bearing 1 ⁹⁄₁₆ 3 ⁹⁄₁₆ To the product SPK 250G 10 12 2 ⁹⁄₁₆ 1 ¹⁵⁄₁₆ ¹¹⁄₁₆ 5,510 plain bore 1 ⁹⁄₁₆ 2 ³⁄₄ To the product SPK 250K 10 12 2 ⁹⁄₁₆ 1 ¹⁵⁄₁₆ ¹¹⁄₁₆ 5,510 ball bearing 1 ³⁄₁₆ 2 ³⁄₄ To the product SPK 251K 10 12 3 ¹⁄₈ 2 ³⁄₈ 1 7,715 ball bearing 1 ⁹⁄₁₆ 3 ⁹⁄₁₆ To the product -
SPK – Rigid casters
The SPK series is also available as a caster with a rigid rig:
BS series: Heavy duty welded steel rigid rig with top plate fitting
A detailed description of the rig series is available in our guide.
Wheel Ø
[inch]Wheel Ø
including flange
[inch]Wheel
width
[inch]Running
width
[inch]Flange
location
[inch]Load capacity
at 2.5 mph
[lbs]Bearing type
Total height
[inch]Plate
dimensions
[inch]Bolt hole
spacing
[inch]Bolt
hole Ø
[inch]BS-SPK 100K 4 4 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,765 ball bearing 6 ³⁄₁₆ 5 ¹⁄₂ x 4 ⁵⁄₁₆ 4 1/8 x 2 31/32-3 5/32 To the product BS-SPK 125K 5 5 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 1,985 ball bearing 6 ¹¹⁄₁₆ 5 ¹⁄₂ x 4 ⁵⁄₁₆ 4 1/8 x 2 31/32-3 5/32 To the product BS-SPK 150K 6 6 1 ¹³⁄₁₆ 1 ⁷⁄₁₆ ¹⁄₂ 2,205 ball bearing 7 ⁷⁄₈ 5 ¹⁄₂ x 4 ⁵⁄₁₆ 4 1/8 x 2 31/32-3 5/32 To the product BS-SPK 200K 8 8 2 ¹⁄₁₆ 1 ¹⁄₂ ¹³⁄₁₆ 3,305 ball bearing 9 ⁵⁄₈ 5 ¹⁄₂ x 4 ⁵⁄₁₆ 4 1/8 x 2 31/32-3 5/32 To the product BS-SPK 201K 8 8 3 ¹⁄₈ 2 ³⁄₈ 1 6,615 ball bearing 9 ⁵⁄₈ 6 ⁷⁄₈ x 5 ¹⁄₂ 5 1/2 x 4 1/8 To the product BS-SPK 250K 10 10 2 ⁹⁄₁₆ 1 ¹⁵⁄₁₆ ¹¹⁄₁₆ 5,510 ball bearing 12 6 ⁷⁄₈ x 5 ¹⁄₂ 5 1/2 x 4 1/8 To the product BS-SPK 251K 10 10 3 ¹⁄₈ 2 ³⁄₈ 1 7,715 ball bearing 12 7 ⁷⁄₈ x 6 ⁵⁄₁₆ 6 5/16 x 4 3/4 To the product