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Scienceware 371021238 Rare Earth Samarium Cobalt Spinbar Octagon Magnetic Stirrer Bar, 1/2" Length x 3/8" Height

3.5 out of 5 stars 4 customer reviews

Price: $8.10 ($8.10 / Each) & FREE Shipping on orders over $35. Details
Only 2 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
1/2 x 3/8" (1.30 x .95cm)
  • Enter your model number above to make sure this fits.
  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from samarium cobalt provides stronger magnetic attraction in viscous solutions and at high speeds than a magnet made from an alloy of alnico V
  • Green color for quick identification

Product Specifications
Part Number 371021238
Number of Items 1
Outside Diameter 0.375  inches
Overall Height 3/8  inches
Overall Length 0.5  inches
Size 1/2 x 3/8" (1.30 x .95cm)
Specification for this product family
Brand Name Bel-Art Products
Material Type PTFE (Polytetrafluoroethylene)
Color Bright green
Shape Octagon
UNSPSC Code 41121802

The Bel-Art Scienceware Spinbar octagonal-shaped stir bar with built-in piv... See more product details


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$8.10 ($8.10 / Each) & FREE Shipping on orders over $35. Details Only 2 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Scienceware 371021238 Rare Earth Samarium Cobalt Spinbar Octagon Magnetic Stirrer Bar, 1/2" Length x 3/8" Height
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  • Bel-Art Scienceware 371440112 PTFE Cross Spinplus Magnetic Stirrer Bar, 1-1/2" x 5/8" Size
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  • Scienceware 371100118 PTFE Octagon Spinbar Magnetic Magnetic Stirrer Bar, with Integral Pivot Ring, White, 1-1/8" Length, 5/16" Diameter
Total price: $30.90
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Product Description

Size: 1/2 x 3/8" (1.30 x .95cm)

Scienceware rare earth samarium cobalt spinbar octagon magnetic stirring bars can provide up to three times stronger stirring power versus Alnico magnetic stirring bars. They reduce spinout in viscous solutions or in high speed stirring applications. Stronger coupling with the drive magnet keeps the stirring bar centered and rotating effectively. The octagon shape with pivot ring creates strong turbulence with minimal chattering and friction. Encapsulated in bright green Teflon PTFE, they are easy to differentiate from other stirring bars and are autoclave safe. Spinbar Samarium Cobalt magnetic stirring bars are manufactured in a Registered ISO 9001:2008, as Verified by SGS Certification. Applicable in Biotech, Pharmaceuticals, University, R and D, Clinical, Environmental industries.

From the Manufacturer

ASIN B005IAJDP0 B005IAJDIM B005IAJDS2 B005IAJDY6
Bel-Art Catalog No. F37102-0138 F37102-1238 F37102-0238 F37102-0003
Size 1 x ⅜" (2.54 x .95cm) ½ x ⅜" (1.30 x .95cm) 2 x ⅜" (5.10 x .95cm) 3 x ½" (7.60 x 1.30cm)

Product Details

Size: 1/2 x 3/8" (1.30 x .95cm)
  • Shipping Weight: 0.8 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B005IAJDIM
  • Item model number: 371021238
  • Average Customer Review: 3.5 out of 5 stars 4 customer reviews
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Customer Reviews

Top Customer Reviews

Size: 2 x 3/8" (5.10 x .95cm) Verified Purchase
Bought one for my lab. Only slightly more powerful than a typical alinco magnet teflon coated stir bar. Can pick up twice as many paper clips. But not what I expected given the powerful REE Nd magnets I own. Samarium-Cobalt magnets (chemical formula: SmCo5) are less powerful than Nd magents. But are needed because of the high temperatures that can be expected in a lab, that would demagnetize a Nd magnet (chemical formula Nd2Fe14B). But, still, a little disappointing. I will update with more observations when I get them.
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Size: 2 x 3/8" (5.10 x .95cm) Verified Purchase
This is definitely stronger than alnico V, but I wonder if it had been sitting in stock stored improperly. It should be stored with an iron cap, or if stored next to other magnets, alternating N-S. It came in a blister card, so I was thinking that if they were stacked next to each other and they all face the same way, then that is the worst way to retain their magnetism. This is a $20 item, so one would think it there would be consideration given to that.
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Size: 1 x 3/8" (2.54 x .95cm) Verified Purchase
This stirbar is very well made. I use this in a two litre Erlenmeyer flask for making yeast starters for homebrewing. It works perfectly.
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Size: 1/2 x 3/8" (1.30 x .95cm) Verified Purchase
The magnetic is too small to spin/agitate liquid even in a 50ml flask.
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Scienceware 371021238 Rare Earth Samarium Cobalt Spinbar Octagon Magnetic Stirrer Bar, 1/2" Length x 3/8" Height
This item: Scienceware 371021238 Rare Earth Samarium Cobalt Spinbar Octagon Magnetic Stirrer Bar, 1/2" Length x 3/8" Height
Price: $8.10
Ships from and sold by Amazon.com