Model > T-8422B > M. Threading mechanism
REF-NO QTY RM CODE NAME OF PARTS
 For -[][]3 
1 1 SA3417301 UPPER THREAD TENSION ASSY -3
2 2 SA3415001 TENSION SPRING, L
 For -[][]5 
1 1 SA2607301 UPPER THREAD TENSION ASSY -5
2 2 SA3416101 TENSION SPRING LL
 For -T[]F 
1 1 SA2818301 UPPER THREAD TENSION ASSY -1
2 2 SA3414101 TENSION SPRING M
  
3 1 SA4212001 TENSION PLATE ASSY
4 1 SA2613001 TENSION STUD
5 1 SA2614201 THREAD TAKE-UP SPRING L
6 2 SA2615001 GUIDE ASSY, T/TAKE-UP SPRING
7 1 SA2619001 SPACER
8 1 SA2623201 THREAD TAKE-UP SPRING R
9 1 SA2620001 COLLAR
10 1 SA2621001 STOPPER SUPPORT
11 1 021300106 NUT 1 M3
12 1 SA2626001 SET SCREW (CP) M3.5
13 1 SA2624001 SPRING GUIDE SET SCREW
14 1 SA2625001 ADJUSTING THUMB
15 1 SA2626001 SET SCREW (CP) M3.5
16 1 SA2627001 COLLAR
17 1 SA2628001 TENSION NUT
18 1 SA2629001 STOPPER
19 1 004350616 SCREW FLAT M3.5X6
20 1 SA2824001 NUT, WHIRL-STOP M3.5
21 1 SA2630001 STOPPER
22 1 062350512 SCREW PAN M3.5X5
23 4 145446001 DISC TENSION
24 2 159805001 TENSION DISC PRESSER
25 2 S20681000 WASHER
26 2 S20682105 TENSION NUT
27 4 144504001 THREAD GUIDE DISC
28 2 154560101 PRE-TENSION SPRING A
29 2 155510001 TENSION NUT
30 1 SA2632001 TENSION RELEASE PLATE
31 1 012500536 SET SCREW SOCKET (FT) M5X5
32 1 S38274001 T-RELEASE SPRING
33 2 SA2633001 SHOULDER SCREW, M3.5
34 1 SA4506001 TENSION RELEASE PIN, L
35 1 SA4507001 TENSION RELEASE PIN, R
36 1 SA2634001 THREAD GUIDE, U: ARM
37 2 004350616 SCREW FLAT M3.5X6
38 1 SA2635001 THREAD QUANTITY ADJUST
39 1 062300616 SCREW PAN M3X6
42 2 062500816 SCREW PAN M5X8
43 2 SA2636001 THREAD RETAINER
44 2 012060636 SET SCREW SOCKET (FT) M6X6
45 1 SA2637001 BAR, TENSION RELEASE
46 1 SA2638001 THREAD GUIDE, M: ARM
47 1 SA2640001 SCREW FLAT M5X8
50 1 SA6378001 CAP
  
 For T-8421B 
40 1 SA2639001 THREAD GUIDE, D: ARM
41 1 114941001 FELT
48 1 SA2640001 SCREW FLAT M5X8
 For T-8422B 
48 1 SA2640001 SCREW FLAT M5X8
49 1 SA2638001 THREAD GUIDE, M: ARM
  • A. Machine body
  • B. Upper shaft mechanism
  • C. Needle bar rocking mechanism
  • D. Presser foot mechanism
  • E. Feed mechanism
  • F. Quick reverse mechanism
  • G. Feed shaft mechanism
  • H. Gauge parts
  • J1. Rotary hook mechanism (T-8421B)
  • J2. Rotary hook mechanism (T-8422B)
  • J3. Rotary hook mechanism
  • K. Lower shaft mechanism
  • L. Lubrication
  • M. Threading mechanism
  • N. Bobbin winder mechanism
  • P. Thread trimmer mechanism
  • Q. Tension release mechanism (T-8422B)
  • R. Thread wiper mechanism (T-8422B)
  • S1. Control box and motor mechanism
  • S2. Control box mechanism
  • T. Quick reverse switch mechanism
  • U. Power supply equipment mechanism
  • V. Presser foot lifting solenoid set mechanism (Option parts)
  • Z1. Accessories
  • Z2. Accessories
  • Wa. Warning labels
  • Sp1. Different parts list (Without Thread trimmer)
  • Sp2. Different parts list (With Thread trimmer)
  • Ga1-1. Gauge parts list (T-8421B) (For normal)
  • Ga1-2. Gauge parts list (T-8421B) (For foundation)
  • Ga1-3. Gauge parts list (T-8421B) (For sewing without material)
  • Ga1-4. Gauge parts list (T-8421B) (For light materials)
  • Ga1-5. Gauge parts list (T-8421B) (For heavy materials)
  • Ga1-6. Gauge parts list (T-8421B) (For extra heavy materials)
  • Ga1-7. Gauge parts list (T-8421B) (For extra light materials)
  • Ga1-8. Gauge parts list (T-8421B) (For Option parts)
  • Ga1-9. Gauge parts list (T-8421B) (For drop feed)
  • Ga1-10. Gauge parts list (T-8421B) (For shirt fronts)
  • Ga2-1. Gauge parts list (T-8422B) (For normal)
  • Ga2-2. Gauge parts list (T-8422B) (For sewing without material)
  • Ga2-3. Gauge parts list (T-8422B) (For heavy materials)
  • Ga2-4. Gauge parts list (T-8422B) (For extra light materials)
  • Ga2-5. Gauge parts list (T-8422B) (For drop feed)
  

[How to search using an illustration]

[How to search by part code]

Notes on Brother WWW Server

Web sites Terms of Use

Brother World Wide Web Site <> , and Brother Solutions Center Web Site <> (collectively, these "Web Sites") are provided by Brother Industries, Ltd., Japan ("Brother") and may be used for informational purposes only. By using these Web Sites or downloading materials from these Web Sites, you agree to be bound by the terms and conditions set forth in these Terms of Use. If you do not agree to be bound by these Terms of Use, do not use these Web Sites or download materials from these Web Sites.

These Web Sites include links to the web sites operated by affiliates of Brother. Use of such web sites shall be subject to the terms of use particular to such web sites. In addition, you may be required to agree with other terms and conditions (including but not limited to those of "End User License Agreement") when you download certain contents, which, in the avoidance of doubt and in the case of possible conflict, will prevail.

Use of Materials
Brother or third parties who have licensed Brother shall reserve all intellectual property rights (the rights which could be protected by the copyright law, the design law, the trademark law and other intellectual property laws) concerning any documents, programs, movies, animations, articles, sketches, drawings, software, databases, trademarks, logos and other materials available on these Web Sites (the "Information"). Except to enable your personal use of the Information available on these Web Sites as well as rights granted in terms of mandatory law, YOU ARE PROHIBITED FROM REPRODUCING, DISTRIBUTING, MODIFYING, DISPLAYING, SHOWING, PUBLICLY TRANSMITTING OR OTHERWISE CREATING DERIVATIVE PRODUCTS OF ANY OF THE INFORMATION, IN WHOLE OR IN PART, REGARDLESS OF FORM OR MEDIUM, WITHOUT PRIOR WRITTEN PERMISSION FROM THE INTELLECTUAL PROPERTY RIGHT OWNER(S).
Disclaimer
WHILE BROTHER USES ITS BEST EFFORTS TO INCLUDE ACCURATE AND UP-TO-DATE INFORMATION ON THESE WEB SITES, BROTHER MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND, EXPRESSED OR IMPLIED, AS TO ITS ACCURACY OR APPROPRIATENESS (INCLUDING WARRANTIES OR REPRESENTATIONS THAT ANY PARTICULAR IMFORMATION FITS YOUR PURPOSE OR THAT THE INFORMATION IS FREE FROM BUGS OR COMPUTER VIRUSES). BROTHER ASSUMES NO LIABILITY OR RESPONSIBILITY FOR ANY ERRORS OR OMISSIONS IN THE INFORMATION ON THESE WEB SITES. IN NO EVENT SHALL BROTHER BE LIABLE FOR ANY INFRINGEMENT, LOSS OR DAMAGES OF ANY KIND, INCLUDING BUT NOT LIMITED TO PC TROUBLE, LOSS OF DATA, LOSS OF PROFITS, LOSS OF BUSINESS OPPORTUNITIES, INTERRUPTION OF BUSINESS, OR FOR INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, EXEMPLARY OR CONSEQUENTIAL DAMAGES OF ANY KIND THAT RESULTS FROM YOUR USE OF THE INFORMATION ON THESE WEB SITES, YOUR USE OF ANY INFORMATION OBTAINED FROM WEB SITES LINKED FROM THESE WEB SITES, OR INABILITY TO USE THESE WEB SITES OR OTHER WEB SITES LINKED FROM THESE WEB SITES. PLEASE NOTE THAT THE INFORMATION ON THESE WEB SITES MAY BE MODIFIED OR DELETED WITHOUT PRIOR NOTICE.
Links to Other Sites
Any sites of third parties linked to or from these Web Sites are not under the control of Brother and Brother is not responsible for the contents of any such linked site. Brother provides those links to you only for your convenience, and the inclusion of any link to a site does not imply endorsement by Brother of the site.
Protection of Privacy
Brother respects your privacy. When we collect or use your personal data, we will protect your privacy and adhere to our Privacy Policy. As these Web Sites may contain third party links, Brother shall not be held responsible for how your personal information may be used when accessing or visiting these linked sites. During the course of your visit to these Web Sites, we may place a small file called "cookie" on your computer to make the browsing more convenient to you. Though your computer can be identified with cookie, we will not, without prior notification, use cookies, with other personal data, to identify you. You can set your browser to reject cookie.
Trademarks
Brother and the "brother" logo (*) are both trademarks of Brother Industries, Ltd., Japan registered in Japan and certain other countries. Any trade names and product names of other companies appearing on these Web Sites are all trademarks or registered trademarks of those respective companies.
Governing Law
This notice is governed and controlled under the jurisdiction of the laws of Japan.
Inquiries
Please contact us for any inquiries or comments regarding these Web Sites at webmaster@brother.co.jp.

Privacy Policy

Brother Industries, Ltd. (hereinafter referred to as "Brother", "we" or "us") is committed to protect your personal data that you share with us. The following statement explains how we protect your personal data:

1. What Is Personal Data?
Personal data is any information which, in itself or tied with other information, could identify you as a specific individual and which may be contained in the information we collect by means set out in clause 2 below such as name, postal address, telephone number, email address, information related to the products or services which you purchased or used, returned questionnaire, any contacts, information related repairs or access logs of our websites.
2. How Brother Collects Your Personal Data
We collect your personal data:

1. through our websites;
2. by email, mail, telephone or other oral means;
3. and by any other means.
3. How Brother Uses Your Personal Data
We will not use your personal data for purposes other than those notified to you in advance, except:

1. to supply you with our products or services that you requested from us;
2. to respond to your requests for after-sales service including queries and repairs.
(There will be cases where we use your personal data, such as for communication to solve problems which occurred with our products or services provided to you.); and
3. in compliance with the laws or the regulations of Japan.
4. Who Will Your Personal Data Be Disclosed To?
We will not, without your prior consent, disclose your personal data to third parties except:

1. in a form or manner where the personal data is not identifiable as yours;
2. to our affiliated companies and business partners, who are bound by confidentiality obligations, to the extent necessary to fulfill the purpose; or
3. when required by law.
5. Compliance To Laws
We will comply with the laws and the regulations provided for the protection of personal data and guidelines issued by government agencies of Japan and the industry associations.
6. How Brother Handles Your Personal Data
To assure adequate level of personal data protection, we will maintain effective internal rules, have our assigned managers oversee the operations on your personal data and make our directors, employees and temporary staff aware of and abide by such rules.
7. How Brother Secures Your Personal Data
We take the security of your personal data very seriously and will protect it from leakage, destruction or alteration, so that you can feel confident in the security of information you provide to us.
8. Cookies
During the course of your visit to our websites, we may place a small file called a cookie on your computer to make the browsing more convenient to you. Although your computer could be identified with a cookie, we will not, without prior notification, use cookies with other personal data to identify you. You can set your browser to reject cookies.
9. Amendment to this Privacy Policy
We may amend this Privacy Policy in accordance with the revision of the applicable laws or any other reasons.

To best view our site

We recommend you to have the following requirements provided.

Browser Version
Microsoft Internet Explorer9.0 or higher
Screen resolution
1440 x 900 pixels or more