China Slitting Round Blade Suppliers - High Precision Disc Knife for Steel and Non-Ferrous Metal Factories
Product Introduction
We can now guarantee a thickness tolerance of ±0.0005mm. For a certain inner circle, the tolerance can reach H3. All high-precision products are tested in a constant temperature room. With the continuous improvement of machining precision, we have developed ultra high precision cutting tools — whose accuracy has been matched by precision milling tools — achieving a ±0.001mm thickness tolerance and Ra 0.1µ surface roughness as our routine standards.
Using our expertise and know-how, we also meet our customers' higher tolerances for thickness, parallelism, flatness, outer and inner rings. We can also attach a rubber sleeve to the outer diameter according to the customer's request, so that it can be exported smoothly with the knife to prevent scratches.
The rubber sleeve is made of natural primary rubber. The blade sleeve material options and their common use cases are listed below:
| Material / Component | Specification / Standard | Notes |
|---|---|---|
| Green Amine & Acrylonitrile Butadiene Rubber (Rubber Sleeve) | IRHD: 78 ~ 75 | Natural primary rubber |
| Polyurethane Isolation Ring | IRHD: 80 ~ 85 | Isolation & protection |
| Blade Sleeve — S45C Common | Thickness: 0.9mm ~ 100mm | After forging, machining, heat treatment & leveling grinding |
| Blade Sleeve — S50C | Thickness: 0.9mm ~ 100mm | Hardness: 47 ±2 HRC; Tolerance: ±0.003mm/mt |
| Blade Sleeve — 65Mn | Thickness: 0.9mm ~ 100mm | High-durability option |
| Aluminum Spacer — AL7075 | Tolerance: ±0.003mm/mt | Lightweight design for weight reduction |
The purpose of the blade bushing is to maintain a certain width between the dividing round knife, the upper knife and the lower knife, and for horizontal gap adjustment. In order to reduce weight, we can also produce an aluminum spacer using AL7075, with thickness tolerance also controlled within ±0.003mm/mt.
Frequently Asked Questions
-
1 What is the finest thickness tolerance your high-precision cutting tools can achieve?Our manufacturing process can guarantee a thickness tolerance of ±0.0005mm. For certain inner circles, the tolerance can reach the H3 grade. All high-precision products are measured and verified in a controlled constant temperature room to ensure accuracy.
-
2 What surface roughness standard do your products meet?Our routine manufacturing standard achieves a surface roughness of Ra 0.1µ, along with a ±0.001mm thickness tolerance. We also accommodate customers requiring even higher tolerances for thickness, parallelism, flatness, and outer/inner rings.
-
3 Can a rubber sleeve be added to the outer diameter of the blade?Yes. Upon customer request, we can attach a rubber sleeve to the outer diameter to protect the blade during export and prevent scratches. The sleeve is made from natural primary rubber, including green amine and acrylonitrile butadiene rubber (IRHD: 78–75), or polyurethane isolation ring material (IRHD: 80–85).
-
4 What materials are available for blade sleeves, and what is their hardness?Blade sleeves are commonly made from S45C (most common), S50C, and 65Mn. After forging, machining, heat treatment, and leveling grinding, the hardness reaches 47 ±2 HRC. The thickness tolerance is tightly controlled within ±0.003mm/mt.
-
5 What is the purpose of a blade bushing / sleeve?The blade bushing is used to set and maintain a precise width between the dividing round knife, the upper knife, and the lower knife, as well as for horizontal gap adjustment. Blade sleeve thickness commonly ranges from 0.9mm to 100mm, depending on application requirements.
-
6 Is a lightweight aluminum spacer option available?Yes. To reduce weight, we offer aluminum spacers made from AL7075. These spacers maintain the same tight dimensional control as steel options, with thickness tolerance also held within ±0.003mm/mt.