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Parker EXACTOL 400 Series, Bulletin, Page: 3 / 13

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Parker EXACTOL 400 Series Bulletin Download Page 3

Bulletin 4391-B400S

EXACTOL

®

 400 Series Tube Benders

1

Parker Hannifin Corporation

Tube Fittings Division

Columbus, OH

www.parker.com/tfd

Introduction, Capacity and Specifications

EXACTOL

®

 Tube 

Benders

(For 1/4" – 1-1/2" diameter tubing)

Sturdy…Simple…Manual… 
Bends to exact tolerances.

The Parker Exactol Tube Benders are probably the 
most versatile bench benders available today. Built for 
easy manual bending of copper, brass, aluminum, steel 
and stainless steel tubes to exact tolerances, the 400 
Series benders are also compact and portable to any 
area for service use where a vise is available.

Along with the bender itself, Parker has developed a complete package of accessories to enable this tool to be 
used for all types of bending: close bend radius blocks, mandrels for thin wall tubes, bench mounting adapters  
and more.

Capacity

Tube 

O.D. 

(mm)

Material

Tube Wall Thickness (mm)

1.5

2

2.5

3

3.5

4

Bender Code*

18

S

AC

AC

AC

AC

C

C

SS

C

C

C

C

C

C

20

S

AC

AC

AC

C

C

C

SS

C

C

C

C

C

C

22

S

C

C

C

C

C

C

SS

C

C

C

C

C

25

S

C

C

C

C

C

SS

C

C

C

C

28

S

C

C

C

C

SS

C

C

30

S

C

C

C

C

SS

C

C

32

S

C

C

SS

C

38

S

C

SS

*Codes:

  A  Model 412 — Tubing (6mm through 20mm)

 

C  Model 424 — Tubing (6mm through 38mm)

Specifications

Description

Model 412 

Model 424

Min. tube size 

1/4”

1/4”

Max. tube size

3/4” 

1-1/2”

Max. bend

180°

180°

Max. radius

3”

5”

Gear ratio

60:1

60:1

Weight (base unit)

14 lbs.

40 lbs.

Finish

Natural Aluminum

Natural Aluminum

Notes:

1.  All benders are capable of bending 1/2” O.D. and under fully 

annealed steel and stainless steel tubing with no limit on wall 
thickness.

2.  All benders are capable of bending soft aluminum and copper 

tubing to the full range of each bender type capacity with no limit 
on wall thickness.

3.  For hard copper and high strength aluminum use the tabulations 

shown for stainless steel. Observe that very hard materials may 
not be ductile enough to bend without fracture.  

Tube Benders Maximum Capacity Guides

Tube 

O.D. Material

Tube Wall Thickness (Inches)

0.035 0.049 0.058 0.065 0.072 0.083 0.095 0.109 0.12 0.134 0.156 0.188

Bender Code*

3/4"

S

AC

AC

AC

AC

C

C

C

C

C

C

C

C

SS

AC

AC

C

C

C

C

C

C

C

C

C

C

1"

S

C

C

C

C

C

C

C

C

C

C

C

C

SS

C

C

C

C

C

C

C

C

C

C

1-1/4"

S

C

C

C

C

C

C

SS

C

C

C

C

C

1-1/2"

S

C

C

C

C

C

SS

C

C

*Codes:

A  Model 412 – Tubing (1/4" thru 

3/4") – Worm & Gear – Rated 
Torque 2,700 in. lbs.

C  Model 424 – Tubing (1/4" thru 

1-1/2") – Worm & Gear – Rated 
Torque 11,000 in. lbs.

Summary of Contents for EXACTOL 400 Series

Page 1: ...Parker 400 Series Tube Benders Bulletin 4391 B400S ...

Page 2: ...lely responsible for making the final selection of the products and systems and assuring that all performance safety and warning requirements of the application are met The products described herein including without limitation product features specifications designs availability and pricing are subject to change by Parker Hannifin Corporation and its subsidiaries at any time without notice WARNIN...

Page 3: ... S C C SS C 38 S C SS Codes A Model 412 Tubing 6mm through 20mm C Model 424 Tubing 6mm through 38mm Specifications Description Model 412 Model 424 Min tube size 1 4 1 4 Max tube size 3 4 1 1 2 Max bend 180 180 Max radius 3 5 Gear ratio 60 1 60 1 Weight base unit 14 lbs 40 lbs Finish Natural Aluminum Natural Aluminum Notes 1 All benders are capable of bending 1 2 O D and under fully annealed steel ...

Page 4: ...s a ball type thrust bearing and is completely enclosed for safety and protection from external damage The main base of the benders has a square base for clamping in a vise or each bender can also be mounted in an adapter unit and fastened to a workbench Slide Block Inch Sizes Part 4 5 6 8 10 12 550585 14 16 18 20 621045 24 870150 Metric Sizes Part 6 8 10 12 14mm 820091 15 16 18 20mm 820092 22 25 ...

Page 5: ...e end of the tube Each radius die block has a graduated marking at inter vals of 15 to indicate the degree of bend Each radius die block also has an integral clamp arrangement for easy quick positive clamping of the tube except for the close bend radius blocks Radius bocks are marked with the tube size and radius for identification Radius Block Charts Size Tube O D Small Radius Block Large Radius ...

Page 6: ...1 4 through 3 4 are made to drive with two pins radius blocks 7 8 through 1 1 2 are made to drive with three pins After selecting the proper size radius block remove or add one drive pin in the drive plate to correspond with the radius block Mount the selected radius block on the center post and drive post Position the radius block so the 0 mark is toward the vise face and handle end of bender Rad...

Page 7: ...omplished with ease by means of the crank handle operating the mechanism through 60 1 ratio worm gear As the bend is being made the slide block travels with the tube and bears lightly against the radius block to form a true round die enclosing the tube providing a smooth full cross section bend The angle of the bend is indicated by the marks on the radius block At the completion of bend the desire...

Page 8: ...during bending Mandrel Graph Chart Mandrel Mandrel Rod Specifications Data Mandrel Rod Dia in Tube I D in Part No Mandrel Type 1 4 0 283 to 0 362 520506 solid 5 16 0 363 to 0 484 520507 solid 13 32 0 485 to 1 489 520508 solid To order mandrel rods specify mandrel rod size and mandrel type Mandrels Plug Type Size Tube O D in Part No Wall Thickness in 6 3 8 924417 0 035 0 042 8 1 2 924417 0 035 0 04...

Page 9: ...he bottom of the adapter slide Then place the bender in the mounting assembly with the axis of its drive handle shaft parallel with the T slot This places the handle end of the bender towards the opera tor with the adapter scale to the right The adapter slide and scale will be used later to align the bender with the mandrel Step 2 Install Mandrel Rod Stop Assembly Draw a centerline for the mandrel...

Page 10: ...against the radius block to form a true round die enclosing the tube pro viding a smooth full cross section bend Step 11 After Bending Tube At the completion of the bend remove the tie bar retract the slide block vise and unscrew the wing nut on the radius block clamp Then to remove the tube slide it out to the left back along the axis of the mandrel assemble Loosen the mandrel assembly if necessa...

Page 11: ... No Req d 1 Body 13001 1 2 Worm 550602 1 3 Shaft 550603 1 4 Collar 550604 1 5 Pin 3 16 x 3 4 Driv lok C 48 x 238 Drive Pin 1 6 Snap Ring Truarc 5100 75 56 x 207 Snap Ring 1 7 Key 1 8 sq x 1 long 13008 2 8 Bearing Nice 1207 22 550606 1 9 Bearing Nice 400 26 550608 1 10 Worm Gear and Drive Post Assembly 550587 1 11 Bearing N D 99504 550592 2 12 Center Post 13016 1 13 Bearing Stop 550615 2 14 Screw 1...

Page 12: ...621066 1 10 Bearing D2620 13113 1 11 Bearing 3038DS 13114 1 12 Bearing 607 13115 1 13 Pin Driv lok Type E 1 4 dia x 1 1 4 13117 1 14 Nut Drive 621071 1 15 Plug Bearing Retainer 621072 1 16 Screw Pilot Adjusting 621073 1 17 Bearing Flange FF 1102 6 Oilite 13123 2 18 Nut Vise Jaw 621074 1 19 Pin Vise Jaw Nut 621075 1 20 Screw Vise Jaw Adjusting 621076 1 21 Vise Jaw 621077 1 22 Pin Vise Jaw Adjusting...

Page 13: ...k 550583 Size 10 Radius Block 550584 Size 12 Radius Block Carrying case designed specifically for the 412 Kit Model 424 Bender Kit Part No Description 621044 424 Bender Body 550585 Slide Block for Sizes 4 6 8 10 12 621045 Slide Block for Sizes 14 16 18 20 870150 Slide Block for Size 24 550579 Size 4 Radius Block 550581 Size 6 Radius Block 550582 Size 8 Radius Block 550583 Size 10 Radius Block 5505...

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