SUNTES DB-2021B Hydraulic Disc Brake
Customer: What is this product used for?
KAYO: Compare the disc size and operating conditions with the values below to select the correct SUNTES hydraulic or pneumatic disc brake.
Customer: Which specifications should I compare?
KAYO: Check the model-specific values below. Where a group has several variants, each column or row retains its own configuration. Lettered dimensions refer to the matching product drawing; a blank or dash does not state a value.
| Cylinder size (inch) | 1･3/8 | 2･1/8 |
|---|---|---|
| Cylinder area (cm2) | 9.57 | 22.88 |
| Operating hydraulic pressure (MPa) | 1.00–6.86※1 | 0.50–4.90※1 |
| Required fluid volume (cm3) | 1.0 (2.5) | 2.5 (6.0) |
| Applicable disc outside diameter (mm) | φ222–702 | |
| Disc thickness (mm) | 10.4 | |
| Effective braking radius (m) | r = ((Disc diameter)/2 －31 ) / 1000 | |
| Pad model | DB-0400 | |
| Usable pad wear allowance (mm) | 10.0 | |
| Pad friction coefficient (μ) | Dynamic: 0.3 Static: 0.15※2 | |
| Operating fluid | Brake fluid (DOT3 equivalent) or Mineral oil (ISO VG32 equivalent) | |
| Mass (kg) | 4.2 | 4.4 |
Customer: Are there important operating notes?
KAYO: The minimum operating pressure is a reference value and can vary with individual sliding resistance. Bed in new pads to obtain the required braking torque. The stated friction coefficients apply after bedding-in. Values in parentheses for fluid volume refer to the large-retraction version.
Customer: How do I choose the correct version?
KAYO: Match the complete model, disc dimensions, mounting arrangement and operating duty. Check the required torque, speed, control pressure or electrical supply against the actual application.
Customer: What should I send for an enquiry?
KAYO: Send the model or nameplate photo, quantity, existing drawing, installation dimensions and operating conditions. For a replacement part, include the full brake or clamper code and photos of the existing component so that fit and configuration can be checked.