Yost Vises 34C - Manual (Page 3)

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.
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. Yost
recommends at the minimum the following configuration:
Install proper length & diameter bolts along with flat washer through the swivel
base of the vise. The bolt should be long enough to protrude at least 1” beyond,
the underside of the workbench and wood / metal plate. 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.
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).