HARVEY AH-3 User manual

Contents
1. Foreword................................................................................................2
2. Warranty Information & Limitations...............................................3
3. Application............................................................................................ 3
4. Identification & Specification...........................................................4
5. Operations.............................................................................................6
6. Maintenance..........................................................................................9
1.前言..........................................................................................................12
2.质保信息..................................................................................................12
3.适用范围..................................................................................................12
4.组成及参数信息......................................................................................13
5.操作说明..................................................................................................15
6.日常维护..................................................................................................17
Exploded View and Parts List............................................................. 18

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English Version

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1. Foreword
Congratulations on your new AH-3 /AH-3T Arch Hold Down! We appreciate
your support in Harvey and hope that this product will serve you well for
many years to come!
In order to acquaint you to your new AH-3 /AH-3T Arch Hold Down, please
carefully review the information provided in this manual before assembling
or operating this product. This user manual is intended to help you better
understand how to safely assembly, properly use, and maintain your tool.
While this manual tries to cover all aspects of proper usage and safety
regulations, unfortunately we cannot cover everything. It is assumed that
the operator has experience with operating all tools and machineries used
in conjunction with our product. Failure to follow necessary and proper
safety precautions can result in serious damage or bodily injuries. We
recommend that the operator familiarize themselves with the product
before using the product. If you are unsure or need additional information
about our product, then please contact Harvey service team for assistance.
As a company, Harvey strives to continuously improve our products. We
reserve the rights to modify specifications, designs, operation, and
maintenance instructions as necessary without advance notice.

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2. Warranty Information & Limitations
All Harvey products are warranted to be free from defects in material and
craftsmanship. We stand by our product and offer a limited one-year
warranty from the date of purchase. All warranty claims, repairs,
replacements should be serviced by Harvey or an authorized Harvey
service professional. Defective parts will be repaired or replaced by Harvey
at no additional charge. The warranty will not cover the following:
◆Normal wear, tear, and consumable parts
◆Abuse, misuse, or neglect of the product
◆Lack of proper care and maintenance
◆Use of non-genuine Harvey parts and/or components
◆Unauthorized repairs, alterations or modifications
◆Any force majeure, fire or explosion
3. Application
The AH-3 /AH-3T Arch Hold Down can be used for holding down a
workpiece in many different applications, however the intended purpose of
the two versions offered are as follows:
Model AH-3 (suitable for workbenches): Secured onto a
workbench by inserting through a workbench dog holes.
Model AH-3T (suitable for Harvey sliding table & sliding table
saws): Secured onto the T-slot of your Harvey ST-1400/ST-1500
sliding tables or any sliding table saw with a suitable T-slot.
IMPORTANT NOTE:
For AH-3T Arch Hold Down, the hold down does NOT fit standard 3/4”
T-slots as it was designed for sliding tables. The T-slot Locking Block has
two sectional dimensions to adapt to different types of T-slots. The
dimensions for T-Slot are as follows:
T-Slot Top Width: 15.5mm (5/8” in.)
T-Slot Height: 13mm (1/2” in.)
T-Slot Bottom Width (Cross Section 1): 30mm (1-3/16” in.)
T-Slot Bottom Width (Cross Section 2): 20mm (25/32” in.)

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4. Identification & Specification
4.1 AH-3T Arch Hold Down
Specification
Max. Holding Force：246 lb
Max. Holding Thickness: 4-5/16"
Max. Throat Depth：3-5/32"
Package Dimension：16-1/2"×9-5/16"×3"
Gross / Net Weight：3.68lbs / 2.27lbs
Note: The size of the T-slot locking block is mainly suitable for the T-slot on
the woodworking sliding table. It can be installed into the T-slot from two
directions to adapt to different T-slots. The cross sections of the T-slot
locking block are shown in Fig.2, among which Cross Section 2 is designed
mainly be compatible with the Harvey ST-1400 and ST-1500 series sliding
tables.
The longer leg is the balancing leg, and the shorter leg is the working leg
used to clamp the workpiece.
No.
Name
A
Pressure Knob
B
Quick Release Button
C
Locking Slider
D
Arch Set
E
Knurled Knob
F
T-slot Locking Block
G
Jaw Block
E
F
D
G
C
A
B
Fig.1
Fig.2
Cross Section 2
Cross Section 1

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4.2 AH-3 Arch Hold Down
Specification
Max. Holding Force：246 lb
Max. Holding Thickness：4-5/16"
Max. Throat Depth：3-5/32"
Compatible Table Hole Diameter: 3/4"~13/16"
Compatible Table Thickness：2"~6"
Package Dimension：16-1/2"×9-5/16"×3"
Gross / Net Weight：4.01lbs / 2.6lbs
Note: For 6" bench tops, the maximum holding thickness is 4-5/16” inches.
For bench tops of other thicknesses, the maximum holding thickness can
be increased by padding one end of the arch set.
The longer leg is the balancing leg, and the shorter leg is the working leg
used to clamp the workpiece.
No.
Name
A
Pressure Knob
B
Quick Release Button
C
D
Locking Slider
Arch Set
E
F
G
H
Stop Block
Knurled Knob
Jaw Block
Tension Block Set
I
Tension Block
Fig.3
G
A
B
C
D
E
H
F
I

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5. Operations
5.1 Operations of AH-3T (for Sliding Tables)
AH-3T is primarily intended for holding down a workpiece on the sliding
table. The following instruction is applicable to the Harvey ST-1500 Sliding
Table as an example to detail the operation of the hold down. However, for
other applications, please use these instructions as reference.
1. Press and hold the Quick Release Button (B) to move the Arch
Set Assembly upward along the lead screw (as shown in Fig. 4a).
2. Choose a suitable side for installing the T-slot Locking Block (F)
and insert the T-slot Locking Block F into the T-slot on the sliding table
(as shown in Fig. 4a).
For ST-1500 Sliding Table, Cross Section 2 of the T-slot
Locking Block should be used.
3. Rotate the Knurled Knob (E) to secure the hold down to the sliding
table (as shown in Fig. 4b).
4. With workpiece positioned underneath the hold down, press and
hold the Quick Release Button (B) to slide the Arch Set Assembly
downwards. The two Jaw Blocks (G) should be positioned close to
Fig.4
A
B
F
G
E

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the workpiece and the table surface respectively.
5. Once positioned correctly, release Quick Release Button (B) and
rotate the Pressure Knob (A) to secure the workpiece down to the
sliding table.
Note: Always double check the hold down to ensure that the workpiece is
firmly held down before performing any task. Multiple hold downs may be
necessary to properly secure a workpiece.
5.2 Operations of AH-3 (for Workbenches)
The AH-3 Arch Down is primarily intended for the benches with a
thickness of 2"～6". For benches of different thickness, the position of
Stop Block (E) must be set before using. The adjusting method is as
follows:
1. Measure the thickness (t) of the bench.
2. Loosen the two set screws on the
Stop Block (E) and set distance (L)
between the Stop Block (E) and the
bottom of the arch hold down as
shown in Fig. 5.
The distance of (L) = (t) + 2-3/16"
3. Once the position of Stop Block (E)
is determined and set, then secure
the set screws tightly.
Fig.5
E

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The following instruction is applicable for a 2” bench as an example to
detail the operation of the hold down. However, for other applications,
please use these instructions as reference.
1. Before setting the Stop Block (E), press and hold the Quick Release
Button (B) to move the Arch Set Assembly upward along the lead screw
allowing clearance for adjusting the Stop Block (E).
2. Adjust the Stop Block (E) to be suitable for a 2" bench as directed in the
previous section above. For a 2” bench, the distance (L) should be as
follow:
L = 2" (Bench thickness) + 2-3/16"
L = 4-3/16"
3. Rotate and raise the Knurled Knob (F) to lightly touch the Stop Block
(E).
Fig.6
A
B
F
E
H
I
G