INTRODUCTION
EWC type needle roller clutch
In addition to the metric and inch sizes of drawn cup clutches and clutch and bearing assemblies already discussed, Zhi hua offers other types of drawn cup clutches to address special customer needs:
Main application： Fishing reels
| Shaft Oia | Part Number | Oimension (mm) | Torque Rating | Limiting Speed | Weight | ||||
| Fw | 1 | 2 | C | Shaft | Housing | ||||
| mm | mm | RPM | g | ||||||
| 4 | EWC 0406 | 4 | 8 | 8.4 | 6 | 0.08 | 32000 | 5000 | |
| 6 | EWC 0606 | 6 | 10 | 10.4 | 6 | 0.19 | 16000 | 8000 | 1.4 |
| 6 | EWC 0608 | 6 | 10 | 10.4 | 8 | 0.25 | 16000 | 8000 | 1.7 |
| 8 | EWC 0809 | 8 | 12 | 12.4 | 9 | 0.49 | 16000 | 9000 | 2.4 |
| 8 | EWC 0812 | 8 | 14 | 15 | 12 | 1.18 | 16000 | 9000 | 5.8 |
| 10 | EWC 1010 | 10 | 16 | 17 | 10 | 1.16 | 14000 | 11000 | 6 |
| 10 | EWC 1012 | 10 | 16 | 17 | 12 | 1.37 | 14000 | 11000 | 6.8 |
| 12 | EWC 1209 | 12 | 18 | 19 | 9 | 3.04 | 12000 | 10000 | 6.2 |
DRAWN CUP ROLLER CLUTCHES FOR USE IN PLASTIC HOUSINGS
EWC FCP AND DF TYPES
Types FCP and DF clutches feature axial grooves in the outside surface of the clutch cup. It is important that these grooves align with similar protrusions in the housing bore to prevent the clutch from slipping relative to the housing.
Types FCP and DF clutches are available with bore diameters of 4, 6, 8 and 10 mm.
These clutches may be made available already mounted in a plastic housing such as a gear or a pulley to meet the customer’s design specifi cations.
CHARACTERISTICS
• Easily unitized – they can be unitized with plastic parts such as gears, pulleys, rollers, etc. as needed.
• Creep preventing structure – creep is prevented by mating a thin cross section roller clutch, which has special grooves on O.D. formed by a precision press, with a plastic part that has an equal number of bosses on the bore of the housing.
• High precision and good durability – high precision and good durability is obtained because cam surfaces are formed by precision deep drawing.
• Small and compact – this series satisfi es the need for a lighter compact product.
STRUCTURE
Drawn cup roller clutches for plastic housings are composed of a drawn cup with internal cam surfaces and creep preventing grooves on O.D., rollers, and a retainer with either integral plastic or stainless steel springs.
The plastic housings can be a plastic gear, a pulley, a roller, etc., so it is possible to design the housing to meet any customers’ needs.
ROLLER CLUTCH UNITS WITH PLASTIC HOUSINGS
FCU TYPES
Type FCU clutches were developed for offi ce equipment and similar applications.
The FCU clutches are available with bore diameters of 6 and 8 mm.
They can be supplied with housings of various shapes to meet customer needs.
RECOMMENDED FIT FOR SHAFT AND HOUSING
Drawn cup roller clutches for plastic housings are at their designed
dimensions and tolerances only when they are installed in plastic
housings.
• Shaft Material:
• Carbon steel for machine structural use
• Rolled steel for general use
• Stainless steel
• Shaft Tolerance: h9 class
• Shaft surface fi nish: 0.4 micrometers
• Housing: Please consult your representative for housing bore sizes if purchasing roller clutches without housings. These roller clutches can be used with cylindrical steel or aluminum housings. In this case, please consult your representative for proper fi t.
