Engel Transverse Duct Flange (TDF) Roll Formers

Engel Transverse Duct Flange (TDF) Roll Formers allow you to roll form your own sealable flanges on transverse duct joints during the fabrication process eliminating the need for add-on flange. Our TDF roll formers produce flange on the machine’s left-hand auxiliary and have unique, snap-in corners that eliminate spot welding. Optional rolls are also available for Z-Bar and Clip. Engel’s line-up of TDF Roll Formers include:

  • Model HB-1640: uses 16 roll-forming stations with a capacity of 18 to 26 ga. at speeds of 75 feet per minute
  • Model TDF V: uses 16 forming stations with a capacity of 18 to 26 ga. at speeds of 50-60 feet per minute.
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Instead of add-on flange, roll forming your own sealable flanges on transverse duct joints during the fabrication process has never been easier. Engel Transverse Duct Flange (TDF) Roll Formers produce flange on the machine’s left-hand auxiliary, and has unique, snap-in corners that eliminate spot welding. Optional rolls are also available for Z-Bar and Clip. Engel’s line-up of TDF Roll Formers include:

  • Model HB-1640: uses 16 roll-forming stations and operates at a speed of 75 feet per minute. There are no adjustments when going from 26 gauge to 18 gauge material (competition requires adjustments) and the “short parts feeder” — 6″ length minimum — requires no manual adjustment and removal of machine guard when running short parts (competition does).
  • Model TDF V: uses 16 roll-forming stations and operates at a speed of 50-60 feet per minute. This is the only transverse duct connector machine on the market certified to comply with SMACNA Duct Construction Standard (DCS) T-25b based on actual laboratory tests across the full range of water gauges.

Each model also features:

  • Rated for 18-26 gauge mild steel (22 gauge for optional clip rolls)
  • Unitized steel construction
  • High yield and tensile strength shafts and “off the shelf” ball bearings
  • Heavy duty gears are Mod4 (6 pitch) heavy duty style
  • Extended roll shafts for mounting auxiliary rolls, one side outboard only
  • Optional tooling sets available for outboard mounting
  • All steel forming head, hardened steel infeed guide and hardened steel forming rolls mounted on turned and ground spindles
  • No adjustments necessary when going from 26ga to 18ga material
  • Includes Snap Flange Feature
  • Comes standard with short parts feeder
  • 16 Station includes Patented TDF Rolls

Model

Capacity

Depth of Pocket / Size

Speed

Motor / Voltage

Dimensions / Weight

HB-1640

18-26 gauge mild steel

1-11/16"

75 feet per minute

208, 230-460/3/60 VAC, 7-1/2 hp, 1,800 RPM

Length: 127"
Width: 27.5"
Height: 43"
Passline: 36"
Weight: 3,000 lbs.

TDF V

18–26 gauge mild steel
22 gauge for optional clip rolls

1-11/16"

50-60 feet per minute

208, 230-460/3/60 VAC, 7-1/2 hp, 1,800 RPM.

Length: 134"
Width: 28"
Height: 45"
Passline: 38.5"
Weight: 3,000 lbs.

Engel Transverse Duct Flange (TDF) Roll Formers



 
Engel | Transverse Duct Flange (TDF) vs. Slip-On Flange

TDF-V ROI

Material Cost of TDC/TDF Flange

TDC/TDF Cost Per Foot

TDC/TDF Flange uses 2″ of metal (24 sq. inches per linear foot)

TDC/TDF Material Cost per Linear Foot $ per foot
2 Edges to process per joint of ductwork
total material cost per ft. per joint of TDC/TDF Flange
$ per foot (per joint)
Corners

TDC/TDF corner cost
each x 8 Corners/joint
= $

Material Cost of Slip on Flange

Cost Per Stick

20 foot section
5% scrap factor = $

Flange Cost Per Foot

$ per foot
$ per foot
$ per foot

2 Edges to process per joint of ductowork, total material cost per ft per joint of slip on flange = $ per foot (per joint)


Additional Labor Cost for Slip on Flange Fabrication $ per foot (per joint)
Total Cost $ per foot (per joint)

Corners

Slip on corner cost
each x 8 Corners/joint = $ per joint


Comparison Analysis

Slip on Flange: cost/ft $
Cost/ft/joint $
Corner cost/joint $

TDC/TDF FLANGE: cost/ft $
Cost/ft/joint $
Corner cost/joint $

TDC/TDF Flange Savings: $ per ft of Flange
$ per ft. per joint
$ per joint

Example

Duct Size
Slip on Cost/Join $
TDC/TDF Cost/Joint $
TDC/TDF Savings per Join: $

Calculate Shop Savings using TDC/TDF


Estimated Savings per month for your shop using TDC/TDF: $ plus $ per joint for corners

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