Hefei Ruyue Electric Technology Co., Ltd.  

Product Name: Silicon Steel Core of Chokes and Other Magnetic Components Model NO.: SST Shape: Toroidal Technique: Cold Rolled Standard: GB Type: Oriented Silicon Steel Trademark: Ruyue Transport Package: Woodencase Specification: VARIOUS SIZE Origin: China HS Code: 8504909090 Product Description Samples: 7~10 days;Batches(order): 7~30 days accordingly.Range of dimension:- Strip width: minimum 3mm- Inside diameter: minimum 5mm- Outside diameter: minimum 8mm, maximum 1100mmToroidal cores tolerance (mm)Outside DiameterInside DiameterHeightOD△DID△d△h≤10±0.4≤10±0.30±0.3≤25±0.5≤25±0.40±0.3≤50±1.0≤50±0.50±0.4≤80±1.0≤80±0.75±0.5≤100±1.0≤100±0.80±0.5≤160±2.0≤160±1.30±0.8≤200±2.5≤200±1.50±1.5≤320±2.5≤320±2.00±2.0≤500±3.5≤500±2.50±2.5≤800±5.0≤800±3.50±3.0>800±7.5>800±5.00±4.0Optional forms of finished core:(1) Uncut, non-impregnated.(2) Uncut, lightly impregnated with epoxy varnish.(3) Cut, fully impregnated with epoxy resin.(4) Multi-cut, fully imprenated with epoxy resin.(5) Assembled with plastic cases [PP, maximum working temperature 110ºC, thickness 0.4~0.8mm].(6) Green epoxy coating [maximum working temperature 180ºC, thickness 0.20~0.50mm].(7) Black epoxy paiting.Material:High quality CRGO steels with low iron-loss and high permeability in thickness of 0.23mm, 0.27mm and 0.3mm.Characteristic:It is toroidal and wounded in the same direction of closed flux path, no magnetic leakage, so its magnetic performance is best. The coil winding is easy and high efficiency with Toroidal winding machine.Application:Toroidal core is widely used in 50Hz and 400Hz transformers, current transformers, reactors, chokes and other magnetic components of electronic equipment.