Singer · verified physical machine

321D-241M-24

View cited identity evidence · 2 unique proof passages

Jump to: Proof E5, Proof E6

Identity verified · evidence for each owner answer

Identity verified · evidence for each answer

Using and maintaining this machine

Check the conditions alongside each answer. Foot attachment, shank type and adapter requirements are separate; one does not establish universal accessory fit.

Needles and threading

Specified needle

conditional

The Singer Needle Cat row lists 6120-06 75/11.

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Literal OEM notation; not a conversion to a third-party system or an implied retail-item fit. Shared instruction says use only Singer Cat.6120 needles.

Source evidence · 2 unique proof passages: Proof E1, Proof E2

Insertion orientation

conditional

Insert needle with long groove facing toward the operator, fully up to the bar end; tighten the clamp screw.

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Only properly trained personnel operate the machine; repair/fitting/maintenance by properly trained personnel. Source says turn off or unplug for threading, replacing needle/foot and maintenance. Read the complete cited procedure and retain safety devices; this is not stand-alone service instruction.; Use Allen key wrench as illustrated to loosen screw1 and insert/remove needle; source figure distinguishes one- and two-needle versions. No size substitution inferred.

Source evidence · 2 unique proof passages: Proof E2, Proof E3

Presser feet and adapters

Pressure guidance

conditional

Loosen adjusting nut1 and turn adjusting bar2; pressure should be as light as possible while sufficient for proper stitch formation.

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Only properly trained personnel operate the machine; repair/fitting/maintenance by properly trained personnel. Source says turn off or unplug for threading, replacing needle/foot and maintenance. Read the complete cited procedure and retain safety devices; this is not stand-alone service instruction.; Follow Figure18; no holder/shank/adapter or compatible accessory established.

Source evidence · 2 unique proof passages: Proof E4, Proof E3

Features and specifications

Listed sewing speed

conditional

The Speed [spm] row lists 7500 stitches/min.

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Listed specification only; manual does not label this row maximum or prescribe this speed for all fabrics.

Source evidence · 1 unique proof passage: Proof E1

Overedge bight

conditional

The Overedge Bight [mm] row lists 4 mm.

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Not needle gauge, overall stitch width capability or accessory fit.

Source evidence · 1 unique proof passage: Proof E1

Stitch formation

conditional

Four-thread overlock machine

  • Exact Singer 321D-241M-24, retained English manual copyright2010; original physical7/printed4 model row only. No adjacent /KS, /KH or D/K sibling transfer; specifications are not universal operating settings.; Literal application description; no sibling or optional cutter/AFL equipment inferred.

Source evidence · 1 unique proof passage: Proof E1

Bobbins and hook

Detailed specifications, compatible parts, and source library

Evidence coverage

Core answers and cited items

Machine category: Not yet established

Core domains answered: None yet

Domains with cited compatible items: None yet

Unknown is not incompatible. A missing answer means the current official evidence does not support one yet.

Official source library

Documents used on this page

Open the exact OEM PDF page or captured HTML edition when a safe destination exists; otherwise SewGraph labels the OEM support-page fallback honestly.

Singer 321D / 321K

instruction manual

Source authority: Official OEM PDF

Open official source destination · 1 unique proof passage: Proof E1

Evidence library

6 exact proof passages from 1 OEM document

Every passage below says exactly what visible fact it proves. Repeated references to the same locator are counted once; identity evidence never counts as compatibility evidence.

Open exact proof passages · 6 unique proof passages
Official OEM PDF

What this passage proves

  • Specified needle: The Singer Needle Cat row lists 6120-06 75/11.
  • Listed sewing speed: The Speed [spm] row lists 7500 stitches/min.
  • Overedge bight: The Overedge Bight [mm] row lists 4 mm.
  • Stitch formation: Four-thread overlock machine
Singer Model 321D-241M-24; Singer Needle Cat 6120-06 75/11; Speed [spm] 7500; Overedge Bight [mm] 4; Application Four-thread overlock machine
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Visually verified transcription of a scanned page
Visual verification
Checked 2026-10-01T22:17:51.011201+00:00. The page image and transcription are hash-bound in the evidence record.
PDF page
7
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
e7d1f28767616c856ccbf308927cde87fb96174098e30e4bd5a093be7ea4001e
Destination status
direct_pdf
Official OEM PDF

What this passage proves

  • Specified needle: The Singer Needle Cat row lists 6120-06 75/11.
  • Insertion orientation: Insert needle with long groove facing toward the operator, fully up to the bar end; tighten the clamp screw.
Fill Silicon Oil to Reservoir Figure 8 Figure 9 (b) Figure 9 (a) For 1 needle 1 For 2 needle Figure 10 10 Ultra High Speed Overedge and Safety Stitch Machine | Instruction Manual and Parts List Needle Attachment (or Replacement) 3.5 3.4 When sewing in ultra high speed, fill the device with silicon oil in order to prevent needle thread Use only Singer’s Cat. 6120 needles Loosen screw ‘1’ as indicated on Figure 9 & 10 with the Allen key wrench in the accessory box and insert the needle (or remove the old needle). Insert the needle with its long groove facing towards you and push it up until the bar end.. Tighten screw ‘1’. breakage and fabric damage. As show on Figure 8. OK! Insert the needle to the proper depth. 1
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Native document text
PDF page
13
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
08d7b58e5cadb2b7b0c245c6801ab1de60c94ff6d9cf48cb9bf4e98fe827af3d
Destination status
direct_pdf
Official OEM PDF

What this passage proves

  • Insertion orientation: Insert needle with long groove facing toward the operator, fully up to the bar end; tighten the clamp screw.
  • Pressure guidance: Loosen adjusting nut1 and turn adjusting bar2; pressure should be as light as possible while sufficient for proper stitch formation.
1 Ultra High Speed Overedge and Safety Stitch Machine | Instruction Manual and Parts List Safety Instructions 1.1 Important Safety Instructions Important • Before running the machine, make sure all relevant safety specifica- tions are adequate to specifica- tions and technical standards in your country. • The machine should not be run without its safety devices. • The machine should only be oper- ated by properly trained personnel. • For your safety, goggles must be used while running the machine. • Turn off or unplug the machine when the following situations arise: • Passing the thread by the nee- dle or replacing the bobbin or looper. • Replacing the needle, presser foot, throat plate, feed dog and sliding plate. • When the machine is in mainte- nance. • When the operator is not run- ning the machine. • In case of lubricant oil contact with the eyes or skin, washed the surface with plenty of icy water with a generous amount of cold water. In case of ingestion, seek medical help immediately. • Repair, fitting or maintenance should only be performed by properly trained personnel. • Maintenance and repair on elec- tric equipment should only be made by qualified personnel. If any electric device is damaged, the machine should be immedi- ately stopped. • Before starting the machine in full running, a test must be conducted to assure that machine and opera- tor are able to perform the task. • The machine should not be placed next to a sound source as an ultra- sonic welding machine and other equipment. • The machine should only be run with the proper electric cable and connectors, and also the adequate grounding. • The machine should only be used to sew materials as indicated in its instructions manual, and indi- cations of use should be followed. Singer will not be held responsible for any damage caused by unau- thorized changes in the product. When using the machine, basic safety procedures must be followed. Read with attention all instructions before using the machine. When using it, understand that all basic safety instructions are not limited to the following items. Read all instructions, take care of this manual, and use it as reference when necessary.
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Native document text
PDF page
4
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
893d5ca9c2d9b024480811d0c04444db011686e7b4dbcb53cd27a755a99046e6
Destination status
direct_pdf
Official OEM PDF

What this passage proves

  • Pressure guidance: Loosen adjusting nut1 and turn adjusting bar2; pressure should be as light as possible while sufficient for proper stitch formation.
Presser foot pressure Figure 18 Figure 19 14 Ultra High Speed Overedge and Safety Stitch Machine | Instruction Manual and Parts List 3.9 Loosen adjusting nut ‘1’ of Figure 18 and turn adjusting bar ‘2’ to adjust the presser foot pressure.It The differential feed ratio is the ratio of movements between the main feed dog and differential feed dog. When the movement of main feed dog is bigger than the differen- tial feed dog, the fabric is stretched Adjusting the Differential Feed Rate 3.10 at sewing. Otherwise the fabric will be shrunk. Loosen the adjusting nut 1 and turn the adjusting nut 2 to adjust the differential feed ratio. As shown on Figure 19. To stretch To shrink 2 1 1 2 Heavy Light should be as light as possible to be sufficient to obtain the proper stitch formation.
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Native document text
PDF page
17
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
ebf00c5482f41f6e81e46346ef99b0615e599155e8373500617443edcbb6d8ca
Destination status
direct_pdf
Official OEM PDF

What this passage proves

  • Identity — model code: 321D-241M-24
321D-241M-24
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Native document text
PDF page
7
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
0128cf0c92aa742388c2bff9ed018d74400ee4001e713e058100476672ab972b
Destination status
direct_pdf
Official OEM PDF

What this passage proves

  • Identity — preferred display name: 321D-241M-24
321D-241M-24
Document
Singer 321D / 321K
Issuer
Singer
Extraction
Native document text
PDF page
7
Open source
Advanced technical receipt
Asset SHA-256
1ef223ee9bfe59eb8b9ae3c58c532c79eaf8fb1eff897545f907649a61203cf2
Locator
c7dfcf737f32b892058876c230f15a95810400f543695b46dc58524ecf0373c6
Destination status
direct_pdf

What is supported, and what remains open?

0 supported answers and 6 answers with conditions or remaining limits. Evidence coverage is not a probability of accuracy.

Unresolved owner questions (2)
  • Standardized fit: Not established — Not yet verified: No standardized mount/adapter/aftermarket foot compatibility established.
  • Class or fit: Not established — Not yet verified: No bobbin class, case, part or substitution claim made.

Report a correction or share an OEM source

Advanced provenance and dataset receipt

Public snapshot 20dd0eca470109a5ea1abbe3ebe3bd6ef0e9d5d117e0149fdbfb4812de2d49ec

Source export 2008b45263bfd04e482054aa9288d96be865509a039afe9b518a52c2d759d6f0 · source method recorded on each citation