Instron 2716-010, Справочное руководство

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Description
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Components
The major grip components are the body, control mechanism, faces and optional
specimen centering device.
Figure 2 illustrates the grip components.
Body
The front of the alloy steel U-shaped body has a center cavity with integral wedges which
taper toward the open end. The back of the body has two angled slots.
Two screws hold a recessed side plate which overlaps each body wedge and jaw face.
Two steel pins hold the face retainer springs on the front and back of the body.
The closed end of the body has a threaded stud with a machined bore. A control nut
threads on the stud and a spindle passes through the bore. An anti-rotation pin passes
through the body and sits in the control mechanism spindle slot.
Control Mechanism
The control mechanism consists of a control nut and a spindle. The control nut threads
onto the body stud and has two horizontal handles. The thin spindle end passes through
the control nut to the body cavity. A screw attaches a bearing plate to the spindle end.
An anti-rotation pin passes through a vertical slot in the spindle shaft. The spindle shank
has a horizontal bore through which a clevis pin passes. A control nut retainer pin
passes through a smaller horizontal bore at the spindle center. A check nut attaches to
the external threads between the two horizontal bores.
Faces
A pair of tool steel, wedge-shaped jaw faces rest on the body’s integral wedges. Two
posts on each face attach springs to the body. There is a series of serrations cut into the
side of the face which contacts the specimen. Faces may be flat, for flat specimens, or
vee-shaped, for round specimens, with different grades of serrations. Faces with other
contact surfaces are also available, including rubber coated and surfalloy. An optional
specimen centering device attaches to one of the jaw faces.
Specimen Centering Device
The optional specimen centering device is a small metal block which two screws attach
to the outside of a jaw face. A knurled thumb screw secures a thin L-shaped arm which
extends outward across the face.