Seiko TH-8B User Manual

Operating Instructiona
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SEIKO SEWING. MACHINE CO.
From the library of: Superior Sewing Machine & Supply LLC

Seiko TH-8B Specifications

General

Type	Industrial Sewing Machine
Stitch Type	Lockstitch
Application	Heavy Duty
Hook Type	Rotary
Buttonhole	No
Bobbin	Rotary bobbin

Summary

Lubrication

Setting the needle

Removal and insertion of bobbin

Tension of bobbin thread and needle thread

Adjustment of stitch length

Timing of thread tension releasing mechanism

Adjusting on the each points

Adjusting needle position against needle hole of feed dog

Positioning the needle at the center of the feed dog's needle hole and moving it with the feed dog.

Adjusting the height of feed dog

Adjusting the height of the feed dog relative to the needle plate, typically 1.5mm ±0.5mm.

Adjustment for timing of feed dog-rise

Ensuring the crossing point of needle, feed dog, and vibrating foot is at the same position.

Adjusting the forward and backward position of needle bar frame

Timing of needle and hook

Position of Cam for Connecting Rod

Position of Feeding Cam

Height of Needle

Position of Shuttle Hook