China manufacturer carbon brush for electric motors

China manufacturer carbon brush for electric motors   Natural graphite brush The major raw material of this kind of carbon brush is nature graphite ,and resin adhesives with asphalt, after baking, or 1000 degrees of sintering.This type of brush has good lubrication performance and convergence performance.Most used for smooth operation of small and medium-sized dc motor and high speed turbo generator collector ring.   Electrization graphite brush Main ingredients is composition of carbon black, carbon and graphite powder material, through 2500 degrees high temperature treatment, make into artificial graphite crystallite type.This type of carbon brush have excellent directional reversing and self-lubricating properties, are widely used in all kinds of ac/dc motor with long working life.   Metal graphite brush The main material of this kind of carbon brush is electrolytic copper and graphite.According to using need ,sometimes also used silver powder (use of precision instruments), aluminum powder, lead powder and other meta.This type of carbon brush has both rubbing properties of graphite brush and metal of high electrical conductivity, therefore, is suitable for the high load , low reversing , low voltage motor (such as automobile starter motor, etc.).The circumferential speed not more than 30 m/s.   Physical and chemical indicators of carbon brush:

Model	Density g/cm3	Resistivity  µΩm	50hours wear mm	Circumferential  Velocity   m/s	Pressure kPa
	>=	<=	≤
S3	1.70	13	0.2	25	19.6-24.5
D104	1.64	10	0.25	40	14.7-19.6
J205	3.2	6	0.18	25	14.7-19.6
J113	5.85	0.13	0.6	20	17.64-22.54

            FAQ   1.When can i get the price? We usually quote within 24 hours after getting your detailed requirements,like size,quantity etc. If it is an urgent order, you can call us directly.   2. Do you provide samples? Yes, samples are available for you to check our quality.  Samples delivery time will be about 3-10 days.    3.What about the lead time for mass product? The lead time is based on the quantity,about 7-12days.For graphite product,apply Dual-use items license need about 15-20working days.    4.What is your terms of delivery? We accept FOB, CFR, CIF, EXW, etc. You can choose the most convenient wayfor you. Besides that, we can also shipping by Air and Express.    5.Product packaging? We are packed in wooden cases, or according to your requirements.   6.Notice Please note that the price on alibaba is a rough price.The actual price will depends on raw materials, exchange rate ,wage and your order quantity .   Hope to cooperation with you,Thanks !   Our Services   If you want to know more about us,please click here to our main page