4 Pcs BT30-ER20-70 Tool HolderOur BT30 tool holder series is high-quality, high-precision, offering stable performance for your machining applications in drilling, milling, coolant thru, etc.Dependable Combination Durable Design Excellent Performance Simple Operation key FeaturesReliable 4-Piece SetA set contains four collet chucks to meet your various needs.Heavy-Duty DesignIt is made of 40CR for long, durable service life: high heat strength and oxidation resistance, strong toughness, and excellent wear resistance.High PrecisionFace mill holder accuracy: 0.00015"/0.004mm.High SpeedHigh performance with high speed, can meet industrial standards.Effortless to OperateFully ground flange and V-groove easy on tool changers for less spindle and changer maintenance.Wide ApplicationSuitable for CNC Lathe/milling, drill press, and heavy-duty hand tools.SpecificationsSpindle: BT30 Collet Series: ER20 Quantity: 4 piecesGage Length: 2.76"/70 mm Drawbar Thread: M16 Concentrically/runout less than: 0.00015"/0.004 mm Gross Weight: 5.7 lb (2.6 kg)Product Size: 11.4 x 4.6 cm/4.5 x 1.8'' Package Dimensions: 10.2 x 6.7 x 3.1" (26 x 17 x 8 cm) Package Contents4 x Collet Chucks
A**.
Underwhelming
Your browser does not support HTML5 video. I can't remember details at this point. I've had them a while now. Going down my list of reviews that need done...I will say that these have 0 evidence of being balanced. I purchased these over less expensive options specifically for the balance claim.There were burrs, big ones where the drive dog slot is.I did measure runout outside of their spec (.0004 measured vs .00015 max claimed) on the inside of the collet taper.I also desperately needed these, and ran them anyway. They are now reserved for shower drill and tap duty. When running them at 15k, there is a noticeable vibration in my machine.Overall, I am not happy with them, but I suppose I got what I paid for.
J**E
Budget friendly for home hobby
These work very well for my home mill great value
A**R
Good quality
Liked the quality and the fit
Trustpilot
1 week ago
1 day ago
