Description
Brand - RINGSPANN
Part Number - FON 72 SFT RINGSPANN
Category - Integrated Freewheels FON
Principal Dimensions & Specifications (Metric):
Standard Bore Diameter (d) - 40 mm
Maximum Bore Diameter (d) - 55* mm
Dimension (A) - 29.5 mm
Dimension (B) - 38 mm
Dimension (D) - 132 mm
Dimension (F) - 90 mm
Thread (G)** - M8
Dimension (J) - 72 mm
Dimension (L) - 60 mm
Dimension (P) - 1 mm
Dimension (T) - 115 mm
Number of Fastening Holes (Z)** - 12
Weight - 3 kg
Type - Type with RIDUVIT for Extended Service Life Using Coated Sprags
Nominal Torque (MN) - 1250 Nm
Maximum Speed for Inner Ring Freewheels/ Overruns - 1120 RPM
Maximum Speed for Outer Ring Freewheels/ Overruns - 1600 RPM
Description of Suffix:
SFT - Type with RIDUVIT for Extended Service Life Using Coated Sprags
Other salient points to be noted:
• The specified maximum speeds apply for installation conditions as given with Complete Freewheels. Knowing the actual installation conditions higher speeds can be permitted under some circumstances
• Bolting to the face with sprags, available in three types
* Keyway according to DIN 6885
** Z = Number of fastening holes for screws G on pitch circle T
Features:
• Integrated Freewheels FON are sprag freewheels that come without bearing support
• In addition to the standard version, two additional types are available for extended service life and improved indexing accuracy
• Designed to handle nominal torques up to 25,000 Nm
• Available with bores up to 155 mm
Application as: Backstop, Overrunning Clutch, Indexing Freewheel
Application Example:
• Integrated Freewheel FON 57 SFT is used as an overrunning clutch on the main drive shaft of a packaging machine
• During setup mode, the freewheel operates in driving mode, rotating the main shaft at very low speed
• During normal machine operation, the inner ring overruns, and the creep drive is automatically disengaged (freewheeling mode)
• The use of RIDUVIT® sprags provides the freewheel with an extended service life
Mounting:
• Integrated Freewheels FON are supplied without bearing support
• The permissible runout (T.I.R.) must be strictly observed
• The Integrated Freewheel FON is centered using the outer track F on the customer’s attachment part and bolted in place
• The pilot diameter of the customer’s attachment part must have a tolerance of ISO h6
• The shaft tolerance must comply with ISO h6 or j6
Lubrication:
• For both the standard type and the type with RIDUVIT®, an oil lubrication of the specified oil quality must be provided.
• For the type with sprag lift-off Z:
     • At speeds above the sprag lift-off speed, no special lubrication is required; the freewheel operates maintenance-free.
     • At speeds below the sprag lift-off speed, an oil lubrication of the specified oil quality must be provided.
♦ ♦ Images are for representation purposes only
Part Number - FON 72 SFT RINGSPANN
Category - Integrated Freewheels FON
Principal Dimensions & Specifications (Metric):
Standard Bore Diameter (d) - 40 mm
Maximum Bore Diameter (d) - 55* mm
Dimension (A) - 29.5 mm
Dimension (B) - 38 mm
Dimension (D) - 132 mm
Dimension (F) - 90 mm
Thread (G)** - M8
Dimension (J) - 72 mm
Dimension (L) - 60 mm
Dimension (P) - 1 mm
Dimension (T) - 115 mm
Number of Fastening Holes (Z)** - 12
Weight - 3 kg
Type - Type with RIDUVIT for Extended Service Life Using Coated Sprags
Nominal Torque (MN) - 1250 Nm
Maximum Speed for Inner Ring Freewheels/ Overruns - 1120 RPM
Maximum Speed for Outer Ring Freewheels/ Overruns - 1600 RPM
Description of Suffix:
SFT - Type with RIDUVIT for Extended Service Life Using Coated Sprags
Other salient points to be noted:
• The specified maximum speeds apply for installation conditions as given with Complete Freewheels. Knowing the actual installation conditions higher speeds can be permitted under some circumstances
• Bolting to the face with sprags, available in three types
* Keyway according to DIN 6885
** Z = Number of fastening holes for screws G on pitch circle T
Features:
• Integrated Freewheels FON are sprag freewheels that come without bearing support
• In addition to the standard version, two additional types are available for extended service life and improved indexing accuracy
• Designed to handle nominal torques up to 25,000 Nm
• Available with bores up to 155 mm
Application as: Backstop, Overrunning Clutch, Indexing Freewheel
Application Example:
• Integrated Freewheel FON 57 SFT is used as an overrunning clutch on the main drive shaft of a packaging machine
• During setup mode, the freewheel operates in driving mode, rotating the main shaft at very low speed
• During normal machine operation, the inner ring overruns, and the creep drive is automatically disengaged (freewheeling mode)
• The use of RIDUVIT® sprags provides the freewheel with an extended service life
Mounting:
• Integrated Freewheels FON are supplied without bearing support
• The permissible runout (T.I.R.) must be strictly observed
• The Integrated Freewheel FON is centered using the outer track F on the customer’s attachment part and bolted in place
• The pilot diameter of the customer’s attachment part must have a tolerance of ISO h6
• The shaft tolerance must comply with ISO h6 or j6
Lubrication:
• For both the standard type and the type with RIDUVIT®, an oil lubrication of the specified oil quality must be provided.
• For the type with sprag lift-off Z:
     • At speeds above the sprag lift-off speed, no special lubrication is required; the freewheel operates maintenance-free.
     • At speeds below the sprag lift-off speed, an oil lubrication of the specified oil quality must be provided.
♦ ♦ Images are for representation purposes only
