A-Type Lifter Bases, P20 Nitrided — Single-Side T-Slot
Standard-part returns: request authorization within 14 days after delivery; item must be unused, uninstalled, undamaged and in original packaging. Review the full return policy.
Need a non-standard size? Request a Quote →A-type lifter bases (angle lifter seats) with a single-side T-slot, supplied singly. Sizes are given as base × base × height in millimetres, with the mounting thread in brackets where the size has one.
What the lifter base does
The lifter base is the sliding foot that carries an angle lifter in the ejector plate. As the ejector plate rises, the lifter rod is driven up at its angle and the base slides sideways in its slot to absorb the horizontal component. Every millimetre of sideways travel the rod demands has to be available in the base's slot — that is the whole job.
Two things follow from that. The base has to slide freely under load without picking up, which is why these are nitrided rather than left soft. And the slot has to be long enough for the full stroke: a base that runs out of travel does not fail gently, it jams and bends the lifter rod on the same shot.
Standard specification
| Property | Value |
|---|---|
| Material | P20 mould steel |
| Treatment | Nitrided |
| Surface hardness | 900 HV |
| Type | A-type, single-side T-slot |
| Base sizes | 10, 11, 12, 26 and 32 mm square |
| Heights | 24–120 mm, depending on base size |
| Mounting thread | M6 on Ø26 bases, M8 on Ø32; smaller sizes are unthreaded |
| Supplied | Single piece |
| Origin | Danyang, Jiangsu, China |
That is the standard specification for this part type. Note that the surface figure is quoted in Vickers, as a nitrided case should be — the case is too shallow for a meaningful Rockwell C reading. We confirm the material certificate and the measured hardness for your batch in writing before shipping.
Choosing a height
Height sets how far the base sits below the lifter rod, and it interacts with your plate stack rather than standing alone. Measure from the ejector plate face to the underside of the rod at the home position, with the plate fully returned. If you are replacing a base on a running tool, measure the old one — do not scale from the drawing, because bases are frequently machined down at fitting.
Single-side T-slot: orientation matters
An A-type base has the T-slot on one side only. It must be installed with the slot facing the direction the base needs to travel, which is the direction the lifter leans. Fitted a quarter turn out, the base binds on the first ejection stroke.
This is worth a moment at assembly rather than at first trial. If your layout needs travel in both directions, or the lifter angle is compound, a B-type or peanut-head base is the right part instead — ask and we will quote it.
Not listed here
Several variants are deliberately not in the size selector:
- 14 × 14 bases and other sizes carrying an "A" sub-type suffix in the maker's code. We have not confirmed what that suffix designates, and we would rather quote it than guess.
- Rectangular bases such as 32 × 48. The two base dimensions are not interchangeable on a single-side T-slot, and the maker's code does not make the orientation unambiguous. Tell us which face carries the slot and we will confirm it in writing.
- B-type, peanut-head, JIS and adjustable bases, and matching lifter rods and guides.
Request a quote for any of these with your dimensions and lifter angle.
Shipping
International freight is calculated on packed chargeable weight. See Shipping & Delivery for destinations and transit times. Import duties and taxes are the buyer's responsibility — please read the duties section on that page before ordering.
- Material grade
- Confirm before ordering
- Hardness / load grade
- Confirm before ordering
- Surface treatment
- Confirm before ordering
- Key tolerance
- Confirm controlling dimensions before ordering
- Metric specification
- 10 × 10 × 25
- Package quantity
- 1 piece
- Single-piece weight
- To be confirmed
- Package weight
- To be confirmed
- Country of origin
- Danyang, Jiangsu, China
- Processing time
- Varies by specification; confirm before ordering when timing is critical
- International freight
- Quoted from packed chargeable weight; carrier transit time is estimated separately
- Typical application
- Mold maintenance and replacement
- How to select
- Match the listed metric specification to the mating assembly.
- Check before ordering
- Confirm every controlling dimension before ordering.
- Non-standard dimensions
- Submit an RFQ with a drawing, photo or measured dimensions