Description
Product Overview
The Nishimura Jig CD-412 Indexing Chuck is a compact, self-contained workholding solution designed to bring rotary indexing capability to the milling machine table, surface grinder, or toolroom bench without the footprint or cost of a full rotary table. Built around a robust 112mm 3-jaw chuck mounted to a 130mm square base, this unit lets you lock a workpiece in 12 repeatable indexed positions via a cam-lock lever — or clamp it solid at any angle using the indexing marks — making it equally useful for systematic angular operations and one-off setups that demand a specific, locked orientation.
- 12-position cam-lock indexing with any-angle clamp capability — The 12 detent positions give you 30° increments as repeatable reference points, which is enough to cover the most common bolt-circle, hex, and equi-spaced milling operations. The ability to clamp at any intermediate position means you’re not limited to those detents when the job demands an odd angle — a practical advantage over fixed-detent-only indexers.
- 130mm square base with T-slot compatible geometry — A square base in this size class registers cleanly against a machine vice or can be bolted directly to a mill table or surface grinder magnetic chuck. Square geometry also makes it straightforward to flip and re-orient the unit 90° and maintain a known reference — useful when you need the chuck axis vertical or horizontal depending on the operation.
- 3-jaw self-centring chuck with reverse jaw set included — The self-centring chuck handles round and hex stock quickly, while the included reverse jaws extend the gripping range to larger-diameter workpieces. For a jig-type indexer in this class, having both jaw sets on hand is a genuine productivity item — you’re not sourcing replacements before the tool is usable.
- Compact 140mm working height to top of jaws, 10kg mass — At 10kg and 140mm tall, this unit is heavy enough to stay planted under cutting loads without being impractical to move around the shop. The working height is worth checking against your machine’s Z-axis clearance before mounting — particularly on knee mills with limited spindle travel.
- Ideal for — milling equally spaced flats on round stock, drilling bolt-circle patterns without a full rotary table, grinding indexed faces on tooling, cutting hex forms on the mill, producing multi-sided components on a surface grinder, and any operation where you need to rotate a workpiece through fixed angular increments and lock it hard before cutting.
Condition
Used (Good Condition / Shopworn)
The CD-412 is in used working condition consistent with a tool that has seen genuine shop service. The machined surfaces carry the expected patina of a used indexer — light surface oxidation and handling marks on the body, which is typical and cosmetically normal for cast iron and steel tooling of this type. The critical bearing and indexing mechanism engages positively through all 12 positions, and the cam-lock lever locks the chuck body firmly without observable slop. The 3-jaw chuck jaws move freely and close concentrically — you should verify runout against a known-ground test bar or gauge pin before committing it to precision work, as any used 3-jaw will accumulate some jaw wear over time; for most indexing and jig work this is inconsequential, but for close-tolerance turned features it’s worth confirming. The square base reference faces should be checked for flatness on a surface plate before first use. No structural damage, cracking, or missing mechanical components are noted. This is a fully functional unit ready to go to work on the bench.
Included:
- 1 x Nishimura Jig CD-412 Indexing Chuck (130mm square base, 140mm working height)
- 1 x Set of standard (inside) chuck jaws (fitted)
- 1 x Set of reverse (outside) chuck jaws
- 1 x Chuck key
- 1 x Indexing cam-lock lever
Not included: Original carry case or storage box (if applicable), mounting bolts or T-slot hardware, any documentation or calibration certificate.
Brand Information
Nishimura Jig (also rendered as NishimurJIG on product labelling) is a Japanese manufacturer specialising in workholding and jig tooling for precision machining applications. Japanese-manufactured tooling in this category sits in a respected tier — known for consistent manufacturing tolerances, quality castings, and reliable mechanical function — and Nishimura product is generally regarded in the same bracket as other mid-to-upper Japanese toolroom workholding brands rather than budget offshore alternatives. For Australian toolmakers and machinists, Japanese origin is a meaningful indicator of build quality and dimensional consistency that holds up over a working life.
Specifications
| Feature | Specification |
|---|---|
| Brand | Nishimura Jig (NishimurJIG) |
| Model | CD-412 |
| Type | Indexing Chuck / Jig Indexer |
| Base Dimensions | 130mm × 130mm square |
| Working Height (base to top of jaws) | 140mm |
| Indexing Positions | 12 positions (30° increments) via cam-lock detent |
| Intermediate Locking | Yes — clampable at any rotational position using indexing mark |
| Chuck Type | 3-jaw self-centring |
| Jaw Sets Included | Standard (inside) jaws + reverse (outside) jaws |
| Unit Weight | Approx. 10kg |
| Country of Origin | Japan |
| Condition | Used — Good Condition / Shopworn |
| Included Items | Unit, standard jaws (fitted), reverse jaws, chuck key, indexing lever |
| Not Included | Case, mounting hardware, documentation |
Keywords
Nishimura Jig CD-412, Nishimura indexing chuck, CD-412 jig indexer, 3-jaw indexing chuck, rotary indexer milling machine, workholding jig chuck, 12-position indexer mill, Japanese toolroom workholding, indexing chuck surface grinder, bolt circle milling jig, angular indexing chuck, machining centre workholding
