Application areasThe cemented carbide corrugated paper circular knives made by tungsten carbide and cobalt powder metallurgy have high hardness and wear resistance, and at the same time have good heat resistance and corrosion resistance, so that the knives are widely used in the cutting of corrugated cardboard. By adjusting the ratio of tungsten carbide and cobalt and the particle size of tungsten carbide powder, we obtain cemented carbides with different properties to meet the needs of different customers.Our advantageOur company has more than 20 years of production history of tungsten carbide slitting knives, specializing in the production of tungsten carbide corrugated paper round knives and various carbide slitting knives. More than half of the products are exported to Europe, the United States and other developed countries and regions. Product performance fully meets the strict requirements of various high-speed slitting equipments. Product quality is in a leading position in the domestic and foreign industrial tool market segments. Our company's goal is to become the most professional, best quality, and largest supplier of tungsten steel slitting knives.Recommended Materials

Grade	Grain Size	Density	Hardness	TRS(N/mm²)	Suitable for Cutting
		g/cm³	HRA
ZT20U	Sub-fine	14.35-14.5	91.4-91.8	3200	Corrugated board,Chemical fiber,Plastics,Leather
ZT26U	Sub-fine	14-14.1	90.4-90.8	3500	Corrugated board,Battery pole pieces
ZT30U	Sub-fine	13.85-14	89.7-90.2	3200	Paperboard

Common Specifications

Items No	OD (mm)	ID (mm)	T (mm)	Holes(mm)	Available for Machine
1	230	110	1.1	φ9*6holes	FOSBER
2	230	135	1.1	4 key slots	FOSBER
3	220	115	1	φ9*3holes	AGNATI
4	240	32	1.2	φ8.5*2holes	BHS
5	240	115	1	φ9*3holes	AGNATI
6	250	150	0.8		PETERS
7	257	135	1.1		FOSBER
8	260	112	1.5	φ11*6holes	ORANDA
9	260	140	1.5		ISOWA
10	260	168.3	1.2	φ10.5*8holes	MARQUIP
11	270	168.3	1.5	φ10.5*8holes	HSEIH
12	270	140	1.3	φ11*6holes	VATANMAKEINA
13	270	170	1.3	φ10.5*8holes
14	280	160	1	φ7.5*6holes	MITSUBISHI
15	280	202	1.4	φ8*6holes	MITSUBISHI
16	291	203	1.1	φ8.5*6holes	FOSBER
17	300	112	1.2	φ11*6holes	TCY

Knives for corrugated board cutting For Chinese Machines

Items No	OD (mm)	ID (mm)	T (mm)	Holes
1	200	122	1.2
2	210	110	1.5
3	210	122	1.3
4	230	110	1.3
5	230	130	1.5
6	250	105	1.5	φ11mm*6holes
7	250	140	1.5
8	260	112	1.5	φ11mm*6holes
9	260	114	1.6	φ11mm*8holes
10	260	140	1.5
11	260	158	1.5	φ11mm*8holes
12	260	112	1.4	φ11mm*6holes
13	260	158	1.5	φ9.2mm*3holes
14	260	168.3	1.6	φ10.5mm*8holes
15	260	170	1.5	φ9mm*8holes
16	265	112	1.4	φ11mm*6holes
17	265	170	1.5	φ10.5mm*8holes
18	270	168	1.5	φ10.5mm*8holes
19	270	168.3	1.5	φ10.5mm*8holes
20	270	170	1.6	φ10.5mm*8holes
21	280	168	1.6	φ12mm*8holes
22	290	112	1.5	φ12mm*6holes
23	290	168	1.5/1.6	φ12mm*6holes
24	300	112	1.5	φ11mm*6holes

FAQ for technical problems Analysis of the common problems of corrugated board slitting knives (Not: all the problems we discussed for the qualified knives ) Q1 Why The Short working life time of currugated board slitting knives? A :Is the grain size of the grinding wheel proper? Too coarse grain size of grinding wheel make a short working life time of knives Q2 Why the edges of corrugated boards cut by knives with burr and dent? A:Please check the cutting edge of your knives ,is the cutting edge keen enough? Or if the corrrugated board is too wet ? Q3 Knives broken A: Improper assembly (e.g deformed flange plate; improper screwing) will cause the quick break of blades , any improper touch of the blades is strictly prohibited during the working , Unstable swing grinding wheels break the knives,please check the bearing of grinding wheels . Improper touch or strike with other hard things. Accident collision of knives Q4 Chips on the cutting edge after the grinding. A: Unstable swing grinding wheels may cause this problem , even break the knives , The strike of hard things may cause the chips on the cutting edge also . Q5 Why the edge of corrugated board is not straight ? A:Unmatched strength of knives for the corrugated board with high density . FAQ about pre-sales and after-sales Q:Can I get free testing samples? A:Yes, if you have a clear demand, we can provide free samples for testing. Q:How about the leading time ? A:We have regular specifications in stock, and can be shipped within three days after confirming the contract. Q:Can you also supply steel handles? Yes, we have handle suppliers that have cooperated for many years, and can provide you stell scraper handles with high-quality, low-price . Q:Can your factory provide OEM production? A:Yes, if your purchase quantity meets the requirements, we can design the packaging for you according to your requirements Q:Do you guarantee the quality? Yes, we have quality-guaranteed tracking services for the products that have been sold. If you have any questions, please feel free to contact our sales staff. You will get satisfactory after-sales service within 24 hours.