Yost Vise 750-DI User manual

_________________________________________________________________________________
388 West 24th Street Holland, MI 49423 [phone] [phone] Fax
www.yostvises.com [e-mail]
Thank you for choosing a vise from Yost Vises, LLC. For future reference please record
the following:
Model #: 750-DI
Purchase Date: _____________
Supplier: _____________
Inspection and Acceptance
Claims for damage, shortage or errors in shipping must be reported within one (1) day
following delivery to Buyer. Buyer shall have seven (7) days from the date Buyer
receives any products to inspect such products and services for defects and
nonconformance which are not due to damage, shortage or errors in shipping and notify
Seller, in writing, of any defects, nonconformance or rejection of such products. After
such seven (7) day period, Buyer shall be deemed to have irrevocably accepted the
products, if not previously accepted. After such acceptance, Buyer shall have no right to
reject the products for any reason or to revoke acceptance. Buyer hereby agrees that such
seven (7) day period is a reasonable amount of time for such inspection and revocation.
Buyer shall have no right to order any change or modification to any product or services
previously ordered by Buyer or its representatives or cancel any order without Seller's
written consent and payment to Seller of all charges, expenses, commissions and
reasonable profits owed to or incurred by Seller. Specially fabricated or ordered items
may not be canceled or returned, and no refund will be made. The sole and exclusive
remedy for merchandise alleged to be defective in workmanship or material would be the
replacement of the merchandise subject to the manufacturer's inspection and warranty.
Product Specifications:
1. Technical Statistics:
Model Item Jaw Jaw Pipe Throat Gross
Number Number Width Opening Capacity Depth Weight
750-DI 11750 5” 5” ¼” – 3-1/2" 3-3/4" 63 lb.
2. Jaws able to withstand a load of no less than 1600 inch pounds without distortion
of the vise or any components.
3. Vise body (front bar, back jaw, swivel base) Ductile Iron.

IMPORTANT SAFETY INSTRUCTIONS
Warnings: Misuse of vises can cause serious injury to eyes, hands and or
other body parts. Vises must be set up and used properly. Before setup
and use, read, understand and follow all instructions outlined below.
ALWAYS make sure bench
tops are properly secured.
ALWAYS use proper nuts,
bolts and lock washers in all
mounting holes, to hold bench
vise down.
ALWAYS use vise of proper
size and capacity to hold work
object.
ALWAYS wear eye, face, and
ear protection when striking or
using power tools with a vise.
ALWAYS wear dust mask or
respirator when working with
w
ood, metal, chemical dusts
or mists.
ALWAYS wear restrictive
hair covering and anti slip
footwear while operating vise.
ALWAYS hand tighten
handles of lockdowns for
swivel base.
ALWAYS inspect vise for
stress fatigue or damage to the
vise before using.
ALWAYS maintain the vise
–
grease main screw regularly.
Never use a hammer, extension
pipe, or cheater bar on spindle
handle of vise.
NEVER unscrew movable jaw
beyond maximum specified
opening of vise.
NEVER weld base of vise to any
metal object.
NEVER use a vise to press an
object into or out of another
object.
NEVER use and extension pipe to
tighten handles of lockdowns.
NEVER place pressurized
containers or combustible
materials in vise.
NEVER wear loose clothing or
jewelry while operating
vise.
NEVER
apply extreme heat or
prolong heat to the vise as it may
alter structural properties.

If there is any question about a condition being safe or unsafe, do not operate the vise.
To avoid risk of personal injury, equipment damage, fire & shock, make sure work area
has the following conditions:
Floor is dry. Damp, wet or rainy conditions can cause operator to slip.
Operator must be of sufficient age to operate vise in a safe condition.
Well Lit.
Clean and unobstructed.
Workbench is properly secured to floor or wall.
Workbench is designed sufficiently to handle vise and work load (torque placed
upon the vise and workbench).
Mount Vise To A Secure Workbench
1. Place vise on the workbench to identify location of mounting holes. Most right
handed prefer a vise mounted on the left end of the bench, the opposite for a left
handed person.
2. For added strength to the workbench prior to installing and securing vise, place an
18” x 18” x 2” piece of wood (18” x 18” x ¼” metal plate) to the underneath side
of the workbench.
3. Mark and drill holes through the workbench and wood / metal plate using the
swivel base as the template for the mounting holes. Prior to drilling, make sure
area is free & clear of any hazards.
4. Install proper length & diameter bolts into the swivel base of the vise. At a
minimum use a hex bolt of sufficient diameter to fully encase the diameter of the
swivel base bolt hole. Yost recommends at hex bolt 2” longer than the bench top
thickness to accommodate for flat & locking washers as well as nuts. Use
minimum grade 5 bolts. On the underside of the workbench and wood / metal
plate, place a flat washer, lock washer and locking nut to the bolt. Securely
tighten vise to the workbench. Periodically, recheck and re-tighten the nuts.
5. As a possible suggestion mount the vise on the lower left hand corner of the work
bench that way the side of the vise and the handle end of the vise have maximum
work exposure (Rotation of the swivel base and the vise head). The swivel base
plate should be mounted (bolted) near the bottom edge of the work bench -- so
that there is sufficient bolt down capability. The head of the 750 should then be
able to rotate 360 degrees with respect to the horizon.
Vise Operation
Make sure vise selection (size and type) is appropriate for use and application. Larger
vises are readily available through Yost Vises. Never force or use cheater bars, pipe
extensions on the screw handle of the vise as this places excessive pressure on the vise
components and they may fail resulting in severe bodily injury.
Step 1: Make sure vise is securely mounted to the workbench.

Step 2: Make sure the swivel base lockdowns are secure.
Step 3: Open the vise by turning the vise handle counterclockwise. Do not open
beyond the vises rated capacity (jaw opening).
Step 4: Place item between the serrated jaws of the vise.
Step 5: Close the vise by turning the vise handle clockwise until the item is snug
between the serrated jaws.
Step 6: Continue to tighten the screw handle until you can no longer move (twist) the
clamped item. Do not over tighten as this may damage item and / or the vise.
Step 7: When finished working on the item, slowly turn screw handle counterclockwise
to release the item.
Swivel Base Operation
The vise is generally operated perpendicular to the workbench, enabling work to be
performed from either side of the vise. In some cases, the vise may need to be rotated to
allow better and safer access to the item. In order to change the position of the vise,
please follow the steps below:
Step 1: After item is securely mounted in the vise, slowly loosen each lockdown located
on both sides of the vise. Care should be taken not to over-loosen or remove the
lockdowns as this may cause the vise to tip over and cause great bodily injury.
Loosen (turn counterclockwise) each lock down about ¼of a turn until the vise
is able to swivel from the base.
Step 2: Swivel the vise to allow better and safer access to the item.
Step 3: Tighten (turn clockwise) each lockdown so that the vise is securely clamped to
the base.
Full Version of Terms and Conditions of Sale
Available on-line at www.yostvises.com (select “Help” and then Terms Of Sale).
Yost Vises, LLC.
388 West 24th Street
Holland, MI 49423
[phone]
[phone] Fax
www.yostvises.com
[email protected]

Isometric view of Yost Model 750-DI
Updated 11/14/2013
11/14/2013
Omitted Retaining Ring
Used on part 750-19

Part Description for Yost Model 750-DI
Updated 11/14/2013
Part Number
Description
1
Vise Body
2
Outer Base
3
Inner Base Plate
4
Stationary Jaw
5
6 x 1 x 14mm Socket Cap Screws
6
Retaining Pin - Moveable Jaw
7
12 x 1.75 x 65mm Carriage Bolts ZP
8
Retaining Pin- Stationary Jaw
9
Moveable V-Jaw Insert
10
Moveable Jaw
11
5 – 0.8 x 16mm Flat Head Screw
12
Pipe Jaw Insert
13
Lead Screw With Handle, Balled Ends, (2) Rubber Washers
14
Flat Washer - Spacer
15
14-1.5mm Locking Hex Nut
16
Serrated Jaw (1 Pair)
17
Lockdown
18
Spring
19
Lock Pin
20
Pull Knob
21
5-0.8 x 45mm Socket Head Bolt
22
V-Jaw Insert (Stationary Jaw)
23
Rear Cover
24
Flat Washer - Spacer
Changes -- 11/14/2013
Omitted Retaining Ring used on part #750-19