SF Type Single Flanged Flexible Jaw Coupling
The SF Type Single Flanged Flexible Jaw Coupling connects heavy machinery via a single radially removable flange, allowing in-situ elastomer replacement without moving either connected machine. Torque range 35–19,650 N·m, bore to Ø200 mm. Designed for high-availability industrial drives where maintenance downtime is tightly controlled.
SF Type Single Flanged Flexible Jaw Coupling
Single radially removable flange design for heavy machinery — elastomer replacement without moving either connected machine, cutting planned maintenance time on high-availability drives.
Designed for High-Availability Heavy Machinery
In high-availability plant environments, the time cost of moving a motor or driven machine to access a coupling spider is often unacceptable. The SF Type Single Flanged Flexible Jaw Coupling eliminates this constraint by incorporating a single radially removable flange, giving direct access to the elastomeric spider without requiring any axial displacement of connected equipment.
The SF Type covers drive torques from 35 N·m (TS24 SF) to 19,650 N·m (TS180 SF) — spanning light conveyor auxiliaries through to large process plant main drives. Bore capacity reaches Ø200 mm, accommodating the large shaft diameters common in heavy industry. The flanged hub provides positive axial retention, making the SF Type suitable for both horizontal and vertical shaft arrangements.
All SF Type couplings share the same elastomeric spider technology found across the GBC jaw coupling range — polyurethane, zero-lubrication, and available in 92 ShA or 98 ShA hardness for applications requiring higher torque capacity with the same hub assembly.
Key Engineering Features
Radial Flange Removal
Loosening the flange bolts and removing the flange radially allows the spider to be extracted without moving either the motor or the driven machine — reducing planned maintenance time by hours on large drive assemblies.
Heavy Machinery Flange Connection
The flanged hub is rated for heavy machinery bolted connections, providing positive axial and radial retention that exceeds the holding capacity of plain bore hub couplings under cyclic loading and shock conditions.
Zero-Lubrication Elastomer
Polyurethane spider elements require no grease at any point in their service life, eliminating contamination risk in food-grade, pharmaceutical, and environmentally sensitive process areas.
Starting Torque Absorption
During direct-on-line motor starts, starting torque can reach 5–7× nominal. The SF Type elastomer absorbs these transient peaks, protecting gearbox teeth, motor bearings, and shaft keyways from fretting damage caused by repeated starting cycles.
Broad Torque & Bore Range
Fifteen model sizes from TS24 SF to TS180 SF cover nominal torques from 35 to 19,650 N·m and bore diameters up to Ø200 mm, providing a complete solution from light through to very heavy industrial drives.
Vertical & Horizontal Orientation
The flanged connection provides the axial retention required for vertical shaft applications including vertical turbine pumps, submersible pump column drives, and vertical mixing vessels, without additional retention hardware.
SF Type Series — Technical Specifications
| Model | Nom. Torque (N·m) | Max Speed (rpm) | Bore (mm) | D (mm) | D₁ (mm) | D₂ (mm) | D₃ (mm) | E (mm) | L_SF (mm) |
|---|---|---|---|---|---|---|---|---|---|
| TS24 SF | 35 | 14000 | 8–24 | 55 | 36 | 40 | 55 | 18 | 94 |
| TS28 SF | 95 | 11800 | 8–28 | 65 | 42 | 48 | 65 | 20 | 110 |
| TS38 SF | 190 | 9500 | 10–38 | 80 | 52 | 66 | 78 | 24 | 134 |
| TS42 SF | 265 | 8000 | 10–42 | 95 | 62 | 75 | 94 | 26 | 150 |
| TS48 SF | 310 | 7100 | 10–48 | 105 | 70 | 85 | 104 | 28 | 164 |
| TS55 SF | 410 | 6300 | 15–55 | 120 | 80 | 98 | 118 | 30 | 192 |
| TS65 SF | 625 | 5600 | 15–65 | 135 | 94 | 115 | 134 | 35 | 217 |
| TS75 SF | 1280 | 4750 | 20–75 | 160 | 108 | 135 | 158 | 40 | 248 |
| TS90 SF | 2400 | 3750 | 30–90 | 200 | 142 | 160 | 180 | 45 | 285 |
| TS100 SF | 3300 | 3350 | 30–115 | 225 | 158 | 180 | 200 | 50 | 320 |
| TS110 SF | 4800 | 3000 | 40–125 | 255 | 178 | 200 | 230 | 55 | 347 |
| TS125 SF | 6650 | 2650 | 40–145 | 290 | 206 | 230 | 265 | 60 | 400 |
| TS140 SF | 8600 | 2360 | 40–160 | 320 | 235 | 256 | 300 | 65 | 443 |
| TS160 SF | 12800 | 2000 | 60–180 | 370 | 270 | 290 | 345 | 75 | 501 |
| TS180 SF | 19650 | 1800 | 85–200 | 420 | 315 | 325 | 400 | 85 | 555 |
Customer Reviews & Case Studies
🇦🇺 Australia — Paper & Pulp Manufacturing
A paper mill in Victoria specified TS110 SF couplings on four Fourdrinier wire section drive rolls. The radial flange design reduced scheduled spider replacement time from 4 hours per coupling to 45 minutes, without any motor movement. Over a year of operation, this saved an estimated 52 hours of production time across four coupling positions.
★★★★★
"45 minutes versus 4 hours. That's not a minor improvement — it's transformative for our maintenance cycle."
🇸🇦 Saudi Arabia — Petrochemical Processing
A downstream petrochemical facility near Jubail installed TS90 SF couplings on boiler feed pump drives in a Zone 2 classified area. The zero-lubrication spider eliminated a potential source of hydrocarbon contamination, and the radial maintenance procedure reduced exposure time for maintenance personnel in the classified zone.
★★★★★
"No grease, short access time in the classified zone. The safety case practically writes itself."
🇦🇺 Australia — Wastewater Treatment
A wastewater authority in New South Wales used TS75 SF couplings on vertical turbine pump column drives at a major pumping station. The flanged retention eliminated axial slip concerns, and elastomeric damping reduced pump pulsation transmission into the pump building structure — resolving a long-standing residential noise complaint.
★★★★☆
"Fixed the noise complaint and simplified maintenance. Two problems solved in one product."
🇪🇸 Spain — Food & Beverage
A large olive oil processing facility near Jaén installed TS55 SF couplings on centrifugal decanter drives. The polyurethane spider's chemical resistance to oils and cleaning agents was confirmed by 18 months of operation without spider degradation, and the short planned maintenance window during harvest season was accommodated by the rapid radial replacement procedure.
★★★★★
"Perfect for our short harvest season maintenance windows. Quick and clean."
Frequently Asked Questions
Where both ends of the drive require flange connection with the same rapid-access maintenance capability, review the DF Type Double Flanged Flexible Jaw Coupling for a symmetric double-flange solution across the same model range.
Minimise Coupling Maintenance Downtime on Your Plant?
GBC supplies SF Type single flanged flexible jaw couplings to process plant operators, maintenance contractors, and OEM builders across Australia and internationally. Send us your drive details — torque, bore, speed, and installation constraints — and our team will confirm the right model within one business day.
The SF Type Single Flanged Flexible Jaw Coupling connects heavy machinery via a single radially removable flange, allowing in-situ elastomer replacement without moving either connected machine. Torque range 35–19,650 N·m, bore to Ø200 mm. Designed for high-availability industrial drives where maintenance downtime is tightly controlled.
