(248) 348-7800

sales@belknaptools.com

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Contact Us

 Van F. Belknap Co., Inc.
29164 Wall Street
Wixom, MI 48393 USA
(248) 348-7800
sales@belknaptools.com

Printer-Friendly VersionNEED A SPECIALLY
DESIGNED TOOL?

You're at the right place! Belknap is the Leader in Specialty Torque Applications. Check out our Specialty Tools Gallery for a small sampling of what we've produced for our customers over the years.

EXTENSIONS CALCULATOR

USING ADAPTERS OR EXTENSIONS

Adapters or extensions should only be used in line with the wrench, as opposed to being at an angle, and the actual torque applied will be greater than the torque reading shown.

To obtain your desired torque reading, use the below calculator by inserting your values in the following order:

  1. Extension Length
  2. Wrench Length
  3. Actual Torque

This program is based on the ideal equation:
ACTUAL TQ = INDICATED TQ x (WRENCH LENGTH + EXTENSION LENGTH) / WRENCH LENGTH.

NOTE: We are not responsible for inaccuracies or errors. Please check the output for accuracy before using in a production environment.

Extension CalculatorDownload the desktop version:
ExtensionCalculator.zip
791 KB

  • Handling Hook for Automotive Frame
    Material Handling
    #11 Automotive Frame
    Handling Hook
  • Square Drive Nylon Sleeve Retaining Hex Socket
    Sockets
    #4 Retaining Hex Socket
    with Square Drive
    and Nylon Sleeve
  • Drive End Pipe Wrench
    Drive Ends
    #6 Pipe Wrench Drive End
  • Spring Install Tool Pneumatic Door Hinge
    Assembly & Installation
    #6 Pneumatic Door Hinge
    Spring Install Tool
  • Setting Spacer Front Curb Height
    Fixtures
    #11 Front Curb Height
    Setting Spacer
  • Shank Converter Square Drive
    Crowfoot Adapters
    #4 Square Drive to
    Shank Converter
  • Special Offset Ratcheting Box Drive End
    Drive Ends
    #11 Ratcheting Box Drive
    End with Special Offset
  • Tool Hand Hose Clamp
    Hose Clamp Tools
    #8 Hand Hose Clamp Tool
  • Crowfoot Holding Wrench Adapter
    Crowfoot Adapters
    #5 Holding Wrench Adapter
  • Fixture for Automotive Instrument Panel Build-Up
    Material Handling
    #10 Automotive Instrument Panel
    Build-Up Fixture
  • Reduced Thickness V-Bottom Drive End
    Drive Ends
    #9 V-Bottom Drive End
    with Reduced Thickness
  • Tool Hand Hose Clamp
    Hose Clamp Tools
    #10 Hand Hose Clamp Tool
  • Hand Tool Clip Removal
    Assembly & Installation
    #28 Clip Removal Hand Tool
  • Plastic Scrivit Pneumatic Install Tool
    Assembly & Installation
    #34 Pneumatic Plastic Scrivit
    Install Tool
  • Tool Spreader
    Assembly & Installation
    #31 Spreader Tool
  • Install Tool Pneumatic Snap Ring
    Assembly & Installation
    #11 Pneumatic Snap Ring
    Install Tool
  • Torque Wrench Transmission Plug
    Assembly & Installation
    #29 Transmission Plug
    Torque Wrench
  • Hose Clamp Tool Plier
    Hose Clamp Tools
    #11 Plier Hose Clamp Tool
  • Threaded Rod T-Handle
    Assembly & Installation
    #27 T-Handle with Threaded Rod
  • Square Drive Fast Lead Wobble Socket
    Sockets
    #11 Fast Lead Wobble
    Socket with Square Drive
  • Feeder Pneumatic Engine Pin Installer
    Assembly & Installation
    #2 Pneumatic Engine Pin
    Installer with Feeder
  • Female Torx Drive End Maxi-Break Torque Wrench
    Torque Wrenches
    #10 Maxi-Break Torque
    Wrench with Female
    Torx Drive End
  • Socket Heat Sensor
    Sockets
    #21 Heat Sensor Socket
  • Torx Bit for Rounded Fasteners Top Ink Marker Torque Wrench
    Torque Wrenches
    #11 Top Ink Marker
    with Torx Bit for
    Rounded Fasteners
  • Female Square Drive Spanner
    Crowfoot Adapters
    #3 Spanner with Female
    Square Drive
  • Slipper Torque Hand Tool T-Handle
    Torque Wrenches
    #9 T-Handle Slipper
    Torque Hand Tool
  • Support Stand Driveshaft
    Fixtures
    #13 Driveshaft Support Stand
  • Tool Belt Tensioning
    Assembly & Installation
    #16 Belt Tensioning Tool
  • Square Drive Hex Driver
    Sockets
    #19 Hex Drive with
    Square Drive
  • Table for Rear Axle Build-Up
    Fixtures
    #16 Rear Axle Build-Up Table
  • Nylon Housing Surface Drive Socket
    Sockets
    #1 Surface Drive Socket
    with Nylon Housing
  • Spanner Drive End Torque Wrench
    Torque Wrenches
    #6 Torque Wrench with
    Spanner Drive End
  • Tool Shaft Indexing
    Assembly & Installation
    #21 Tie Rod Adjusting Tool
  • Paint Marking Electronic Signal Torque Wrench
    Torque Wrenches
    #22 Electronic Signal Paint
    Marking Torque Wrench
  • Adapter for Air Muffler
    Crowfoot Adapters
    #9 Air Muffler Adapter
  • Adapter Allen Head
    Crowfoot Adapters
    #8 Allen Head Adapter
  • Drive End Offset Extended Box
    Drive Ends
    #23 Offset Extended
    Box Drive End
  • Handling Hook for Rear Axle
    Material Handling
    #9 Rear Axle Handling Hook
  • Torque Wrench Top Ink Marking
    Torque Wrenches
    #15 Top Ink Marking
    Torque Wrench
  • B Shank V-Bottom Drive End
    Drive Ends
    #17 V-Bottom Drive End
    with B Shank
  • Indexing Driveshaft Tool
    Torque Wrenches
    #24 Driveshaft Indexing Tool
  • Socket Special
    Sockets
    #14 Special Socket
  • Clean Out Thread Tool
    Sockets
    #15 Thread Clean Out Tool
  • Magnetic Inserts Non-Marring Hand Tool
    Material Handling
    #2 Non-Marring Hand Tool
    with Magnetic Inserts
  • Tool Scrivit Install
    Assembly & Installation
    #19 Scrivit Install Tool
  • Hex Drive End VB2T-I Preset Torque Wrench
    Torque Wrenches
    #8 VB2T-I Preset Torque
    Wrench with Hex Drive End
  • Adjustable Tension Pressure Roller
    Assembly & Installation
    #23 Pressure Roller with
    Adjustable Tension
  • Fixture Thread Checker Holding
    Fixtures
    #2 Thread Checker Holding
    Fixture
  • Removal Hand Hose Clamp Tool
    Hose Clamp Tools
    #9 Hand Hose Clamp
    Removal Tool
  • Drive End Control Arm
    Drive Ends
    #18 Control Arm Drive End
  • Install Tool Pneumatic Bumper Nut
    Assembly & Installation
    #12 Pneumatic Bumper Nut
    Install Tool
  • Brake Bleeder Ratcheting
    Torque Wrenches
    #21 Ratcheting Brake Bleeder
  • Torque Wrench Glass Adjustment
    Torque Wrenches
    #5 Glass Adjustment
    Torque Wrench
  • Socket Tail Light
    Sockets
    #17 Tail Light Socket
  • Enclosure Install Tool Gas Fill Door
    Assembly & Installation
    #25 Gas Fill Door Enclosure
    Install Tool
  • Rubber Install Tool Cup Holder
    Material Handling
    #6 Cup Holder Rubber
    Install Tool
  • Pipe Wrench Drive End Torque Wrench
    Torque Wrenches
    #4 Torque Wrench with Pipe
    Wrench Drive End
  • Hinge Pin Pneumatic Installer
    Assembly & Installation
    #30 Pneumatic Hinge Pin Installer
  • Drive End Half Moon
    Drive Ends
    #12 Half Moon Drive End
  • Speeder Drive End Punch Marking Torque Wrench
    Torque Wrenches
    #13 Punch Marking Torque
    Wrench with Speeder
    Drive End
  • Removal Tool Hand Clip
    Assembly & Installation
    #22 Hand Clip Removal Tool
  • Fixture Drill Location
    Fixtures
    #4 Drill Location Fixture
  • Adjust Tool Door Glass
    Assembly & Installation
    #8 Door Glass Adjust Tool
  • Interchangeable Tips Locking Hose Clamp Tool
    Hose Clamp Tools
    #4 Locking Hose Clamp Tool
    with Interchangeable Tips
  • Hand Tool Special
    Torque Wrenches
    #16 Special Hand Tool
  • Gauge AC Line Location
    Assembly & Installation
    #20 AC Line Location Gauge
  • Drive End Install Fan
    Drive Ends
    #28 Fan Install Drive End
  • Socket Spring Loaded Wobble
    Sockets
    #13 Spring Loaded
    Wobble Socket
  • Tips Interchangeable Hose Clamp Tool
    Hose Clamp Tools
    #3 Interchangeable Hose
    Clamp Tool Tips
  • Crowfoot Male Square Drive by Female Square Drive
    Crowfoot Adapters
    #1 Male Square Drive
    by Female Square
    Drive Crowfoot
  • Drive End Adjustable
    Drive Ends
    #14 Adjustable Drive End
  • Drive End Brake Line
    Drive Ends
    #8 Brake Line Drive End
  • Drive End Adapter Hose Fitting End
    Drive Ends
    #30 Hose Fitting End
    Adapter Drive End
  • Retainer Pneumatic Hose Clamp Tool
    Hose Clamp Tools
    #7 Pneumatic Hose Clamp
    Tool with Retainer
  • Spline Socket Steering Column
    Sockets
    #3 Steering Column
    Spline Socket
  • Drive End Non-Marring Pipe Wrench
    Drive Ends
    #24 Non-Marring Pipe
    Wrench Drive End
  • Drive End Special
    Drive Ends
    #22 Special Drive End
  • Drive End Axle to Transmission Gauge
    Drive Ends
    #13 Axle to Transmission
    Gauge Drive End
  • Jam Nut Adapter Tie-Rod
    Drive Ends
    #25 Tie-Rod Jam Nut Adapter
  • Ratcheting Allen Head Drive End Torque Wrench
    Torque Wrenches
    #18 Torque Wrench with
    Ratcheting Allen Head
    Drive End
  • Removal Tool Breather Valve
    Assembly & Installation
    #1 Breather Valve
    Removal Tool
  • Socket Battery Terminal
    Sockets
    #12 Battery Terminal Socket
  • Crowfoot Box Offset Female Square Drive
    Crowfoot Adapters
    #2 Box Offset Female
    Square Drive Crowfoot
  • Drive End Torque Wrench Hex Flare Offset
    Torque Wrenches
    #12 Torque Wrench with Hex
    Flare Offset Drive End
  • Fixture Rear Axle Sway Bar
    Fixtures
    #9 Rear Axle Sway
    Bar Fixture
  • Insert Hand Tool
    Assembly & Installation
    #3 Hand Tool for Insert
  • Install Tool Push Pin
    Assembly & Installation
    #7 Push Pin Install Tool
  • Drive End Special
    Drive Ends
    #26 Special Drive End
  • Tool Heat Shield Install
    Material Handling
    #7 Heat Shield Install Tool
  • Install Tool Pneumatic Snap Ring
    Assembly & Installation
    #5 Pneumatic Snap Ring
    Install Tool
  • Install Tool Trunk Latch
    Assembly & Installation
    #9 Trunk Latch Install Tool
  • Removal Tool Freeze Plug
    Assembly & Installation
    #4 Freeze Plug Removal Tool
  • Puller for Transmission Shaft Seal
    Assembly & Installation
    #35 Transmission Shaft
    Seal Puller
  • Operator Hose Clamp Fixture
    Fixtures
    #3 Hose Clamp Fixture
    with Operator
  • Installation Transmission Seal
    Assembly & Installation
    #33 Transmission Seal Installer
  • Torque Wrench Holding Offset
    Torque Wrenches
    #23 Offset Holding
    Torque Wrench
  • Nylon Sleeve Lug Nut Socket
    Sockets
    #23 Lug Nut Socket
    with Nylon Sleeve
  • Open End 12 Point Crowfoot
    Crowfoot Adapters
    #6 12 Point U-Bottom
    Crowfoot
  • Side Ink Marking Torque Wrench Formax Drive End
    Drive Ends
    #5 Formax Drive End
    for Side Ink Marking
    Torque Wrench
  • Torque Wrench Large Octal Nut
    Torque Wrenches
    #7 Large Octal Nut
    Torque Wrench
  • Automotive VIN Stamping Holding Fixture
    Fixtures
    #17 Holding Fixture for Stamping
    Automotive VIN
  • Pin Deck Locating
    Material Handling
    #3 Deck Locating Pin
  • Tool Jam Nut
    Torque Wrenches
    #20 Jam Nut Tool
  • Magnet Hand Socket Tool
    Sockets
    #16 Hand Socket
    Tool with Magnet
  • Torque Wrench Maxi-Break Click
    Torque Wrenches
    #14 Maxi-Break Click
    Torque Wrench
  • Holding Tool Water Pump
    Material Handling
    #8 Water Pump Holding
    Torque Wrench
  • Drive End Special Formax
    Drive Ends
    #1 Special Formax Drive End
  • Drive End Allen Head
    Drive Ends
    #27 Allen Head Drive End
  • V-Bottom Drive End Offset Extended
    Drive Ends
    #29 Offset Extended
    V-Bottom Drive End
  • Special Screwdriver
    Assembly & Installation
    #32 Special Screwdriver
  • Nylon Sleeve Antenna Socket
    Sockets
    #22 Antenna Socket
    with Nylon Sleeve
  • Holding Bracket Power Tool
    Material Handling
    #1 Power Tool Holding Bracket
  • Special Offset Adapter Torque Wrench
    Torque Wrenches
    #19 Torque Wrench with
    Special Offset Adapter
  • Adjustable Force Pneumatic Nut Install Tool
    Assembly & Installation
    #14 Pneumatic Nut Install
    Tool with Adjustable Force
  • Socket Spring Loaded Dual
    Sockets
    #8 Spring Loaded Dual Socket
  • Spacer Rear Curb Height Setting
    Fixtures
    #8 Rear Curb Height
    Setting Spacer
  • Extended Socket Ratchet Slip-Torq
    Torque Wrenches
    #1 Ratchet with Slip-Torq
    and Extended Socket
  • Male Hex Drive V-Bottom Extended Adapter
    Drive Ends
    #19 V-Bottom Extended Adapter
    with Male Hex Drive
  • Special Grip Ratcheting Torque Wrench
    Torque Wrenches
    #17 Ratcheting Torque
    Wrench with Special Grip
  • Handle Square Drive
    Assembly & Installation
    #15 Square Drive with Handle
  • Extension Spring Loaded
    Sockets
    #9 Spring Loaded Extension
  • Hose Clamp Tool Inverted
    Hose Clamp Tools
    #12 Inverted Hose Clamp Tool
  • Tool Inline Pneumatic Hose Clamp
    Hose Clamp Tools
    #6 Inline Pneumatic Hose
    Clamp Tool
  • Square Drive Slotted Nut Driver
    Sockets
    #6 Slotted Nut Driver
    with Square Drive
  • Install Tool Pneumatic Drum Handle
    Assembly & Installation
    #10 Pneumatic Drum Handle
    Install Tool
  • Speeder Open End Crowfoot
    Crowfoot Adapters
    #7 Open End Speeder
    Crowfoot
  • Fixture Park Brake Lever Assembly
    Fixtures
    #6 Park Brake Lever
    Assembly Fixture
  • Socket Ink Marking Torque Wrench
    Sockets
    #2 Ink Marking Torque
    Wrench Socket
  • Tool Pneumatic Push Nut Install
    Assembly & Installation
    #17 Pneumatic Push Nut
    Install Tool
  • Handling Hook Front Axle
    Material Handling
    #4 Front Axle Handling Hook
  • Moving Battery Tool
    Material Handling
    #5 Battery Moving Tool
  • ISO Adapter Heavy Duty U-Bottom Drive End
    Drive Ends
    #4 Heavy Duty U-Bottom
    Drive End with ISO Adapter
  • Interchangeable Tips Hand Hose Clamp Tool
    Hose Clamp Tools
    #5 Hand Hose Clamp Tool
    with Interchangeable Tips
  • Socket Top Ink Marking Torque Wrench
    Torque Wrenches
    #3 Top Ink Marking Torque
    Wrench with Socket
  • Square Drive Spring Loaded Socket
    Sockets
    #10 Spring Loaded Socket
    with Square Drive
  • Gauge Sunroof Height
    Fixtures
    #1 Sunroof Height Gauge
  • Socket Adjustable Runoff Surface Drive
    Sockets
    #18 Surface Drive Socket
    with Adjustable Runoff
  • Tool Clip
    Assembly & Installation
    #24 Clip Tool
  • Square Drive Torx
    Sockets
    #5 Torx with Square Drive
  • Special Sockets Yankee Screwdriver
    Sockets
    #7 Yankee Screwdriver
    with Special Sockets
  • Fixture Window Button
    Fixtures
    #12 Window Button Fixture
  • Adjusting Tool Camber
    Torque Wrenches
    #2 Camber Adjusting Tool
  • Drive End Cam Adjust
    Drive Ends
    #20 Cam Adjust Drive End
  • Drive End Torx Offset
    Drive Ends
    #3 Torx Offset Drive End
  • Drive End Spanner
    Drive Ends
    #16 Spanner Drive End
  • Pneumatic Install Tool AC Line
    Assembly & Installation
    #13 AC Line Pneumatic
    Install Tool
  • Pneumatic Hose Clamp Tool Bench Mounted
    Hose Clamp Tools
    #2 Bench Mounted Pneumatic
    Hose Clamp Tool
  • Drive End Special Allen
    Drive Ends
    #21 Special Allen Drive End
  • Drive End Flare Nut Half Moon
    Drive Ends
    #10 Flare Nut Half
    Moon Drive End
  • Spreader Pneumatic Driveshaft
    Assembly & Installation
    #18 Pneumatic Driveshaft
    Spreader
  • Hose Clamp Tool Hand
    Hose Clamp Tools
    #1 Hand Hose Clamp Tool
  • Brake Tester Hand Park
    Assembly & Installation
    #26 Hand Park Brake Tester
  • Fixture VIN Plate Split
    Fixtures
    #5 VIN Plate Split Fixture
  • Fixture Holding
    Fixtures
    #14 Holding Fixture
  • Magnet Socket Shortened
    Sockets
    #20 Shortened Socket
    with Magnet
  • Drive End Special
    Drive Ends
    #7 Special Drive End
  • Fixture Steering Shaft
    Fixtures
    #7 Steering Shaft Fixture
  • Gage Tailpipe
    Fixtures
    #15 Tailpipe Gage
  • Drive End Spanner
    Drive Ends
    #15 Spanner Drive End
  • Male Hex U-Bottom Drive End
    Drive Ends
    #2 U-Bottom with Male
    Hex Drive End
  • Fixture Front Brake Line
    Fixtures
    #10 Front Brake Line Fixture
© 2003-2012 Van F. BELKNAP Co., Inc. • 29164 Wall Street, Wixom, MI 48393 • CALL 248-348-7800 • FAX 248-348-9821 • EMAIL sales@belknaptools.com