Brother T-8421C manual Gauge parts Refer to the parts book for more details

Twin needle lock stitcher series

Gauge parts (Refer to the parts book for more details)

●NEEDLE FEED Standard gauge parts

Needle gauge	T-8420C, T-8421C		T-8422C		T-8450C	T-8452C		T-8720C	T-8722C	T-8750C	T-8752C
	-□□F	-□□3,	-□□3	-□□5	-□□3,	-□□3	-□□5	-□□5	-□□5	-□□5	-□□3,
		-□□5			-□□5						-□□5
3.2mm(1/8)		○	○	○	○	○	○	○	○	○	○
4.0mm(5/32)		○	○	○	○	○	○	○	○	○	○
4.8mm(3/16)	◎	○	○	○	○	○	○	○	○	○	○
5.6mm(7/32)						○					○
6.4mm(1/4)	○	◎	◎	◎	◎	◎	◎	◎	◎	◎	◎
7.1mm(9/32)						○	○
7.9mm(5/16)	○	○	○	○	○	○	○	○	○	○	○
9.5mm(3/8)		○	○	○	○	○	○	○	○	○	○
11.1mm(7/16)		○	○		○	○
12.7mm(1/2)		○	○	○	○	○	○	○	○	○	○
15.9mm(5/8)		○	○	○	○	○	○	○	○	○	○
19.1mm(3/4)				○
22.2mm(7/8)				○
25.4mm(1)		○	○	○					○
31.8mm(1-1/4)		○							○
34.9mm(1-3/8)		○						○	○
38.1mm(1-1/2)		○		○					○

◎Included as a standard gauge at the time of shipment from Brother

●NEEDLE FEED Chaining-off gauge parts

（Different in needle plate, feed dog and presser foot assembly from the standard gauge parts. Suitable for sewing small articles continuously.）

Needle gauge	T-8420C, T-8421C	T-8422C	T-8450C	T-8452C	T-8720C	T-8722C
4.8mm(3/16)	○		○		○
6.4mm(1/4)	○	○	○	○	○	○

●NEEDLE FEED Gauge parts for heavy materials

（Different in feed dog from the standard gauge parts. The feed dog needle hole is larger than that of ﾐ□□5 gauge parts.）

Needle gauge	T-8420C T-8421C	T-8422C	T-8450C	T-8452C	T-8720C	T-8722C	T-8750C	T-8752C
4.8mm(3/16)	○	○	○	○	○	○	○	○
6.4mm(1/4)	○	○	○	○	○	○	○	○

●NEEDLE FEED Gauge parts for extra heavy materials

（Different in feed dog from the standard gauge parts. The feed dog needle hole is larger than that of the gauge parts for heavy materials.）

Needle gauge	T-8420C, T-8421C	T-8450C	T-8720C	T-8750C
3.2mm(1/8)	○	○	○	○
4.8mm(3/16)	○	○	○	○
6.4mm(1/4)	○	○	○	○
9.5mm(3/8)	○	○	○	○
12.7mm(1/2)	○	○	○	○
15.9mm(5/8)	○	○	○	○