High Precision Bushings, Tubes and Guides
Pre-fabricated High Precision Bushings and Tubes in Steel and
Tungsten Carbide
Prefabricated Bushings and Tubes in Steel and Tungsten Carbide
High precision hole polish
Outer-Diameter and Length raw
Material: Steel and Tungsten Carbide
Zonco produces small and high precision bushings and tubes.
Inside geometry is available in cylindrical, conical design, with
cylindrical relief or custom designed characteristics. If required,
inside bores can be produced ultra precise within tolerances less
than 2 micron, polished or ground.
For standard products or custom design you can select from many
different materials with excelent properties. Our prefered
materials are:
Tungsten Carbide, steel, hardened steel, powder metallurgical steel
and high speed steel. See also our Materials Overview...
Supplying different industries for years adds to our experience to
be your partner for bushings.
Geometrical specifications and tolerances:
High precision hole polish. Tolerance: +/-0.001 mm
High precision Outer-Diameter. Tolerance: +/-0.001 mm
High precision concentricity TIR. Standard: 0.003 mm / Special:
0.002 mm
Cobalt Binder Grades:
| Grade | Binder(Wt%) | Density(g/cm3) | Hardness(HRA) | TRS(≥N/mm2) |
| ZK6 | 6 | 14.8 | 90 | 1520 |
| ZK6X | 6 | 14.9 | 91 | 1450 |
| ZK6A | 6 | 14.9 | 92 | 1540 |
| ZK8 | 8 | 14.7 | 89.5 | 1750 |
| ZK12 | 12 | 14.2 | 88 | 1810 |
| ZK15 | 15 | 14.0 | 87 | 2050 |
| ZK20 | 20 | 13.5 | 85.5 | 2450 |
| Common Alloy Grades, Ghysical Mechanical Properties And Recommended
Application |
| Grade | WC% | Co/Ni % | Physical and mechanical properties | Grain size (μm) | Recommended application |
| Density (g/cm3) | TRS (N/mm2) | Hardness (HRA) |
| ZG01 | 100 | 0 | 15.3-15.5 | 1200 | 95.5 | 0.3 | Ultra-high hardness, high wear resistance, anti-corrosion, with
certain anti-destructive ability |
| ZG04X | 96 | 4 | 15.0-15.2 | 1600 | 92.8 | 0.8-1.0 | Suitable for drawing die, non-ferrous metal wire drawing and
wear-resistant parts |
| ZG06 | 94 | 6 | 14.8-15.1 | 2500 | 90.0 | 1.2 | Good abrasion resistance, good compression resistance, suitable for
wear-resistant parts that resist abrasion and high pressure. |
| ZG06X | 94 | 6 | 14.8-15.1 | 2400 | 91.5 | 1.0 | Superio wear resistance,good comprehensive properties,suitable for
making non-standard structure components with higher wear
resistance. |
| ZG06A | 94 | 6 | 14.8-15.1 | 2150 | 92.5 | 0.6-0.8 |
| ZG08 | 92 | 8 | 14.6-14.9 | 2700 | 89.0 | 1.2-1.6 | Good general performance, used for general wear parts, molds,
general tools, etc. |
| ZG10.2 | 90 | 10 | 14.3-14.6 | 3800 | 91.7 | 0.7 | Good general performance, suitable for casing and oil nozzle
products |
| ZG11 | 89 | 11 | 14.3-14.7 | 2800 | 88.5 | 1.2-1.6 | Anti-wear, anti-erosion, good comprehensive mechanical strength,
suitable for wear-resistant parts in the petroleum, chemical and
mechanical industries. |
| ZG12X | 88 | 12 | 14.2-14.5 | 3000 | 89.5 | 1.0-1.2 | Anti-erosion, good comprehensive mechanical strength, suitable for
impact-resistant wear-resistant parts, molds, and roller rings. |
| ZG15 | 85 | 15 | 13.8-14.2 | 3000 | 86.5 | 1.2-1.6 |
| ZG15X | 85 | 15 | 13.8-14.2 | 4500 | 89.0 | 0.7 | Excellent wear resistance and toughness,it is suitable for making
integral stamping dies, anti-vibration toolholders, etc. |
| ZG20 | 80 | 20 | 13.4-13.8 | 3100 | 85.0 | 1.0 | Excellent wear resistance and toughness |
| ZN06 | 94 | 6 | 14.5-14.9 | 2000 | 90.0 | 1.2 | Non-magnetic alloy, suitable for sealing ring, non-magnetic
wear-resistant parts and corrosion-resistant parts. |
| ZN09 | 91 | 9 | 14.3-14.6 | 2300 | 89.0 | 1.2-1.6 |
| ZN11 | 89 | 11 | 14.0-14.3 | 2600 | 88.0 | 1.2 |
