DEWALT D25416 Critical Connection Undercut Anchoring System Instruction Manual
CCU Critical Connection Undercut Anchoring System
The DeWALT Critical Connection Undercut (CCU+TM) Anchoring system is a specified anchor system incorporating an undercut anchor and various installation accessories and specific power tools. The contents of this manual will help guide the installer through proper preparation, installation, maintenance and troubleshooting of the CCU+TM anchoring system. This manual is not a substitute for construction drawings or specifications. CCU+TM anchors may be part of an engineered structure. Proper anchor placement and installation are critical to the performance of the structure.
The installer should make sure they have the correct anchors, bits, hammers, vacs and accessories to install CCU+TM anchors as per any construction drawings.
THE CRITICAL CONNECTION UNDERCUT SYSTEM (CCU+™)
A. Anchor
B. Primary bit
HSDB: Hollow stop drill bit for specific drilling depth, primarily used for drilling until collar touches the concrete surface in case of preset installation
HDB: Hollow drill bit for variable drilling depth, primarily used for drilling through the fixture in case of thrubolt installation.
C. Undercut bit
HUCB: Hollow undercut bit for dust-free undercutting
UCB: Undercut bit for economic undercutting.
D. Setting tool
Setting tool for power tool installation with SDS connector
Setting tool for manual installation with hand held hammer
COMPLIANCE
A. ICC-ES
Steel grades A36 and A193, Gr. B7 and SS316 qualified according
to ACI 355.2 for design according to ACI 318: ESR-4810
Download Anchor Design Software DDA™ at:
DEWALT.COM/DDA
B. OSHA
Part of an OSHA Table 1 compliant system.
Dust Extractor System with HEPA Filtration and /Auto Cleaning
Hollow Bit System: HDB, HSDB, HUCB (see above)
Use hood, shroud, etc. to control dust when using conventional bits.
C. Anchors Made In The USA*
We can certify CCU+™ anchors for Trade Agreements Act (TAA), Buy American Act (BAA), American Iron and Steel (AIS), Build America, Buy America Act (BABA), and Buy America (FHWA, FAA, FRA, FTA). Please email anchors@dewalt.com for certification information.
*As of the date of this Instruction Manual, DeWALT Critical Connection Undercut Anchors meet the requirements of the Trade Agreements Act (TAA), Buy American Act (BAA), American Iron and Steel (AIS), Build America, Buy America Act (BABA), and Buy America (FHWA, FAA, FRA, FTA).
SPECIFICATION OF THE ANCHOR
A. Material
- Rod
- Sleeve
- Cone
- Nut
- Washer
| Component No. | Description | Specifications | |
| Carbon Steel Version (A36 or B7) | High Strength Stainless Steel (316 SS) | ||
| 1 | Rod | ASTM A36 or ASTM A193 Grade B7,Zinc Plated ASTM B633, SC1 (Fe/Zn 5) | ASTM A193, Grade 8BM, Class 2 (316 SS) |
| 2 | Sleeve | Carbon Steel, Zinc Plated ASTM B633, SC1 (Fe/Zn 5) | AISI 316 SS |
| 3 | Cone | Carbon Steel, Zinc Plated ASTM B633, SC1 (Fe/Zn 5) | AISI 316 SS |
| 4 | Nut | 3/8″ DIA A36: SAE J955 Grade 23/8″ DIA B7: SAE J955 Grade 81/2″, 5/8″, 3/4″ DIA: ASTM A563, Grade C | 3/8″ DIA SS2: ASTM F594SS 316 Alloy Group 21/2″, 5/8″, 3/4″ DIA: ASTM A194, Grade 8M (316 SS) |
| 5 | Washer | ASTM F844; Meets ANSI/ASMEB18.22.1, Type A plain (wide) | AISI 316 SS; meets ANSI/ASMEB18.22.1, Type A plain (wide) |
Head of Anchor Rod
| Material Identification Code | A36 | B7 | SS2 |
| Length Identification Code | Refer to Installation Parameter Section | ||
| Anchor Size | Symbol | Unit | 3/8″ | 1/2″ | 5/8″ | 3/4″ | |
| Nominal anchor diameter [equals rod diameter] | da | in. (mm) | 3/8 = 0.375(9.5) | 1/2 = 0.5(12.7) | 5/8 = 0.625(15.9) | 3/4 = 0.75(19.1) | |
| Outside anchor diameter [equals drill bit diameter] | dnom = dbit | in. (mm) | 11/16 = 0.688(17.5) | 13/16 = 0.813(20.6) | 1 = 1.000(25.4) | 1-1/4 = 1.250(31.8) | |
| Nominal embedment depth [equals drill hole depth] | hnom | in. (mm) | 4-1/4 (108) | 5-3/8 (137) | 8(203) | 10-5/8 (270) | |
| Effective embedment depth [the anchor is designed for] | hef | in. (mm) | 4.0(102) | 5.0(127) | 7.5(191) | 10.0(254) | |
| Minimum concrete member thickness | hmin | in. (mm) | 6.0(152) | 7.0(178) | 9.75(248) | 12.0(305) | |
| Minimum edge distance | cmin | in. (mm) | 2.5(64) | 3.0(76) | 4.5(114) | 6.0(152) | |
| Minimum spacing distance | smin | in. (mm) | 3.0(76) | 3.75(95) | 5.625(143) | 7.5(191) | |
| Installation torque | A36 | Tinst | ft.-lbf. (Nm) | 11(15) | 29(38) | 70(95) | 118(160) |
| B7 and SS2 | 37(50) | 70(95) | 118(160) | 221(300) | |||
| Torque wrench / socket size | – | in. | 9/16 | 7/8 | 11/16 | 1-1/4 | |
B. Installation parameter
In case of the Preset (PS), installation, the anchor is installed first, and then the attachment (fixture or baseplate) is put in place.
Preset Anchor Installation System Components
| Rod Dia. | in. (mm) | 3/8″ | 1/2″ | 5/8″ | 3/4″ | |||
| Max. Fixture Thickness | 0.875(22) | 1.25(32) | 2(51) | 1.625(41) | 2.375(60) | 2.0(51) | 4.0(102) | |
| Steel Grade | PS A36 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 |
| DFM1311050 | DFM1311100 | DFM1311150 | DFM1311200 | DFM1311250 | DFM1311300 | DFM1311350 | ||
| PS B7 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 | |
| DFM1371050 | DFM1371100 | DFM1371150 | DFM1371200 | DFM1371250 | DFM1371300 | DFM1371350 | ||
| PS SS2 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 | |
| DFM1361050 | DFM1361100 | DFM1361150 | DFM1361200 | DFM1361250 | DFM1361300 | DFM1361350 | ||
In case of the Thrubolt (TB) installation, the anchor is installed through the attachment (fixture or baseplate).
Thrubolt Anchor Installation System Components
| Rod Dia. | in. (mm) | 3/8″ | 1/2″ | 5/8″ | 3/4″ | |||
| Max. Fixture Thickness | 0.875(22) | 1.25(32) | 2(51) | 1.625(41) | 2.375(60) | 2.0(51) | 4.0(102) | |
| Steel Grade | TB A36 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 |
| DFM1311550 | DFM1311600 | DFM1311650 | DFM1311700 | DFM1311750 | DFM1311800 | DFM1311850 | ||
| TB B7 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 | |
| DFM1371550 | DFM1371600 | DFM1371650 | DFM1371700 | DFM1371750 | DFM1371800 | DFM1371850 | ||
| TB SS2 | 3/8 X 6 | 1/2 X 7-1/2 | 1/2 X 8-1/4 | 5/8 X 10-3/4 | 5/8 X 11-1/2 | 3/4 X 14 | 3/4 X 16 | |
| DFM1361550 | DFM1361600 | DFM1361650 | DFM1361700 | DFM1361750 | DFM1361800 | DFM1361850 | ||
INSTALLATION
A. Power Tools
- Vacuums
DCV585
DWV010
DWV012 or DWV015
- SDS+ Hammers
DCH416 Cordless / Battery / DC Tool
D25416 Corded / AC tool
- SDSMAX Hammers
DCH614 Cordless / Battery / DC Tool
D25614 Corded / AC tool
| Anchor Size | Hole Diameter | Hole Depth | Hammer | Vacuum | Primary Bit | Undercut Bit | Setting Tool | ||||||
| Version | HSDB | HDB | Conventional | HUCB | UCB | Manual | Power | ||||||
| SDS+ | DWV010or DWV012or DCV585 | Preset | DFX11380 | ||||||||||
| 3/8″ | 11/16″ | 4-1/4″ | DCH416 | DWA54116 | DW58081 | DFX21380 | DFX213811 | DFX313805 | DFX313825 | ||||
| Thrubolt | – | ||||||||||||
| or D25416 | |||||||||||||
| SDS+ | Preset | DFX11120 | |||||||||||
| 1/2″ | 13/16″ | 5-3/8″ | DCH416 | DWA54316 | DW58141 | DFX21120 | DFX211211 | DFX311210 | DFX311230 | ||||
| Thrubolt | – | ||||||||||||
| or D25416 | |||||||||||||
| SDSMAX | Preset | DFX11580 | |||||||||||
| 5/8″ | 1″ | 8″ | DCH614 | DWA58001 | DW58521 | DFX215802 | DFX215811,2 | DFX315815 | DFX315835 | ||||
| Thrubolt | – | ||||||||||||
| or D25614 | |||||||||||||
| SDSMAX | Preset | DFX11340 | |||||||||||
| 3/4″ | 1-1/4″ | 10-5/8″ | DCH614 | DWA58115 | DW58551 | DFX21340 | DFX213411 | DFX313420 | DFX313440 | ||||
| Thrubolt | – | ||||||||||||
| or D25614 | |||||||||||||
DWH050K 1
The hood allows dust free drilling if conventional primary bits or UCB are used; use of hollow bits is suggested.
DW5891 2
SDSMAX to SDS+ adapter, allowing to use a SDSMAX hammer for a bit with a SDS+ shank; alternatively, use a SDS+ hammer tool.
B. Installation instructions
GENERAL / GETTING PREPARED
Power Tool: Hammer and Vacuum
Connect the bit to the proper hammer and, in case of a hollow bit, to the proper vacuum using the DEWALT AirLock™ connector system.
Hollow Bits
Make sure that air flows freely, clean if required.
Undercut Bits
Make sure the cutter blades slides easily over the bow jaw and the gap can be fully closed.
PRIMARY HOLE DRILLING
HOLLOW BITS
Preset Installation
1a. Before drilling, ensure hollow drill bit holes are not clogged. Using a HSDB of proper size, drill a hole into the base material to the required depth, i.e. until the collar of the bit touches the concrete surface. Continue with Step 3.
Thrubolt Installation
1b. Before drilling, ensure hollow drill bit holes are not clogged. Using a HDB of proper size drill a hole into the base material to the required depth. For this, mark the depth on the bit shank taking the fixture thickness into account. Continue with Step 3.
Preset Installation
1c. Using the proper drill bit size, drill a hole into the base material to the required depth. The tolerances of the drill bit used should meet the requirements of ANSI Standard B212.15. Mark the depth on the bit. Continue with Step 2.
2. Remove dust and debris from the hole following drilling (e.g. suction, forced air). Continue with Step 3.
Thrubolt Installation
1c. Using the proper drill bit size, drill a hole into the base material to the required depth. The tolerances of the drill bit used should meet the requirements of ANSI Standard B212.15. Mark the depth on the bit taking the fixture thickness into account. Continue with Step 2.
2. Remove dust and debris from the hole following drilling (e.g. suction, forced air). Continue with Step 3
HOLLOW BITS
Preset Installation
3a. Insert a HUCB of proper size until it hits the bottom of the hole. Start the hammer at low speed and undercut. Undercutting is complete when the stopper sleeve is fully compressed, i.e. the gap is closed. Continue with Step 5.
UNDERCUTTING
Thrubolt Installation
3b. Insert a HUCB of proper size until it hits the bottom of the hole. Start the hammer at low speed and undercut. Undercutting is complete when the stopper sleeve is fully compressed, i.e. the gap is closed. Continue with Step 5.
CONVENTIONAL BITS
Preset Installation
3c. Insert a UCB of proper size until it hits the bottom of the hole. Start the hammer at low speed and undercut. Undercutting is complete when the stopper sleeve is fully compressed, i.e. the gap is closed. Continue with Step 5.
4. Remove dust and debris from the hole following drilling (e.g. suction, forced air).
Thrubolt Installation
3c. Insert a UCB of proper size until it hits the bottom of the hole. Start the hammer at low speed and undercut. Undercutting is complete when the stopper sleeve is fully compressed, i.e. the gap is closed. Continue with Step 5.
4. Remove dust and debris from the hole following drilling (e.g. suction, forced air).
ANCHOR SETTING
Preset Installation
5. Insert the anchor into hole. Place setting sleeve over anchor and drive the sleeve over the cone. For this, use either a setting tool for manual installation or a setting tool for power tool installation. Take care that the thread does not get damaged during installation.
6. Verify that the red setting mark is visible on the theaded rod at or above the sleeve.
7. Apply proper torque; Do not exceed maximum torque.
Thrubolt Installation
5. Insert the anchor into hole. Place setting sleeve over anchor and drive the sleeve over the cone. For this, use either a setting tool for manual installation or a setting tool for power tool installation. Take care that the thread does not get damaged during installation.
6. Verify that the red setting mark is visible on the theaded rod at or above the sleeve.
7. Apply proper torque; Do not exceed maximum torque.
REPLACING WEAR PARTS
A. Bow jaw
B. Cutter blade
C. Instructions
| Anchors | Bow Jaw | Cutter Blade | |
| HUCB | UCB | HUCB & UCB | |
| 3/8″ | DFX213807 | DFX213805 | DFX213825 |
| 1/2″ | DFX211212 | DFX211210 | DFX211230 |
| 5/8″ | DFX215817 | DFX215815 | DFX215835 |
| 3/4″ | DFX213422 | DFX213420 | DFX213440 |
The cutter blade wears and has to be replaced, depending on the condition of the concrete. Also the bow jaw experience wear at its head over time and needs to be replaced occasionally. The following procedure explains how the cutter blade and the bow jaw, if required, can be changed.
- Press the pin on the undercutter using a screwdriver
- Pull out the bow jaw
- Change the cutter blade
- Insert the bow jaw
Note: The bow jaw used for the HUCB has an air exhaust on one side. Therefore it is important to ensure that the bow jaw is oriented correctly to match the air inlet in the bit chassis! - Align the pin and pinhole and reinsert
TROUBLE SHOOTING
A. Cleaning of primary hollow bit Hollow bits work best in dry concrete. Take care when drilling in wet concrete. The internal hollow channel of smaller diameter HSDB can clog with concrete dust. It is recommended to occasionally blow through the small hole at the rear of the bit using dry compressed air in case of SDS+ bits. The SDSMAX bits can be cleaned from the inlets at the front using a thin gauge wire to dislodge material build up..
B. Un-jamming of undercut bit When the cutter blade of the UCB is stuck while undercutting and it cannot be pulled out from the hole, use wrenches as shown in below picture to relieve the cutter blade closed and remove the undercutter from the hole. After removal, retighten the loosened screw and continue undercutting. This feature is not available for HUCB as these do not tend to jam because of the dust constantly removed during undercutting.
FOR TECHNICAL ASSISTANCE PLEASE CONTACT:
anchors@DEWALT.com
1-800-524-3244
The information contained herein is accurate to the best of DEWALT’s knowledge as of the date of publication and is provided for guidance and informational purposes only. Refer to website for most up to date version of this document. To obtain a project specific certification contact DEWALT engineering at anchors@DEWALT.com
Documents / Resources
 |
DEWALT D25416 Critical Connection Undercut Anchoring System [pdf] Instruction Manual D25416 Critical Connection Undercut Anchoring System, D25416, Critical Connection Undercut Anchoring System, Connection Undercut Anchoring System, Undercut Anchoring System, Anchoring System, System |